bluuebunny/crossref_metadata_2025 huggingface dataset:
ANALISIS PERBANDINGAN EFISIENSI MODAL KERJA ANTARA PT. MAYORA INDAH Tbk. DAN PT. SIANTAR TOP Tbk. YANG TERDAFTAR DI BURSA EFEK INDONESIA
Authors: Nur Sri Wahyuni
Published: December 2022

Working capital is one of the most important asset elements in the company. Because without working capital, the company cannot meet the funding needs to carry out its activities. The working capital turnover period is since cash is invested in working capital elements until it becomes cash again. It is less than one year or short-term. This working capital turnover period shows the level of efficiency in the use of working capital. This research aims to determine which company is more efficient in using working capital between PT. Mayora Indah Tbk. and PT. Siantar Top Tbk. In this research, the data collection techniques used were 1) Documentation, this method is used to obtain information in the form of secondary data that refers to documents related to the working capital efficiency of PT. Mayora Indah Tbk and PT. Siantar Top Tbk. 2) Literature Research, namely data collection techniques by conducting searches using references from books, journals, and papers correlated to the research object for obtaining concepts and data relevant to the problems research as research support. The analytical method used is the descriptive analysis method with financial ratio analysis, where the financial ratio used is the activity ratio, namely the working capital turnover ratio. Based on the research results, PT. Mayora Indah Tbk. Obtaining an average working capital turnover of 3.61 times or 4 times for 5 years, while PT. Siantar Top, Tbk of - 182.14. Therefore, it concludes that PT. Mayora Indah Tbk is more efficient in using its working capital than PT. Siantar Top Tbk.
ANALISIS METODE ON THE JOB TRAINING TERHADAP KINERJA KARYAWAN (STUDI PADA PDAM KOTA MAGELANG)
Authors: Aditya Rachman , Verawati Dian Marlina
Published: December 2022

This research was conducted to determine the effect of on the job training method on employee performance. On the Job Training method is one of the training methods used by PDAM Magelang such as job rotation and special tasks. This research uses quantitative methods. In this research the population is the employees of PDAM Magelang City of Engineering and Customer Relations section and the number of samples taken was 90 respondents. The data analysis technique used is a simple linear regression test which aims to determine the effect of on the job training method variables on employee performance. The results of this research indicate that there is a significant effect of the on the job training method on employee performance. The t-count value of 5.126 is greater than the t-table of 1.987 at the 95% confidence level (α=5%) and DF = 90, with a significance value of 0.000 less than 0.05. So it can be interpreted that the on the job training method has a significant effect on employee performance at PDAM Magelang City. And from the findings in the field, it shows that the on the job training method helps to get the job done and provides additional knowledge.
PERBANDINGAN RISIKO LIKUIDITAS DAN TINGKAT PROFITABILITAS PENERAPAN ASSET LIABILITY MANAGEMENT PADA BANK YANG TERDAFTAR DI BURSA EFEK INDONESIA
Authors: Kamar Karnawi , Cakranegara Pandu Adi , Sartika Karina Dewi , Yakub Rahman
Published: December 2022

The emergence of Covid 19 in the Industrial Era 4.0 where countries in the world are competing to innovate in various fields, both health, education, and the economy to be able to follow the era towards the era of Society 5.0. The purpose of this study was to analyze differences in liquidity risk and profitability level in the application of asset management between state banks and national private banks. The analytical method used is descriptive comparative analysis by providing an overview of the liquidity ratios and profitability levels in the application of asset management at State Banks and National Private Banks listed on the Indonesia Stock Exchange using the formula Cash Ratio and Return on Assets. The results of the study indicate that (1) there is no difference in liquidity risk in the application of asset liability management between state banks and national private banks. The liquidity of the two banks is equally well above the standard set by Bank Indonesia, but there is no insignificant difference in terms of the amount of liquidity. (2) there is no difference in the level of profitability in the application of asset liability management between state banks and national private banks. The profitability of the two banks is above the standard set by Bank Indonesia, but in terms of profitability, there is a slight difference which is not significant.
PENGARUH PENDIDIKAN PELATIHAN DAN PEMANFAATAN TEKNOLOGI TERHADAP KINERJA GURU SMP DI KABUPATEN SIDRAP
Authors: Indrayani Indrayani , Aulia Nurul , Arwin Arwin
Published: December 2022

Organizing training for teachers can be a form of management efforts in schools to be able to improve and develop knowledge and skills for teachers to become teaching staff who have superior competencies so that they can provide the best education for students. This study aims to analyze the effect of the variable Education Training (X1) and Technology Utilization (X2) on Teacher Performance (Y) in public junior high school teachers in Sidrap Regency. This research was conducted at the Department of Education and Culture, especially in SMPN 1, 2, 3, and 5 Pangsid by distributing questionnaires to 90 respondents, where the data were analyzed using multiple linear regression by performing the coefficient of determination test technique, correlation coefficient test, t-test, and test. F by using SPSS application software. The results of this study partially show that Educational Training (X1) and Utilization of Technology (X2) each have a positive and significant effect on Teacher Performance (Y). The results of the research simultaneously show that X1 and X2 together have a significant effect on Y, while the correlation coefficient test (R) shows a value of 0.786 which means that it is moderately correlated, and the coefficient of determination test (R Square) shows 61.8%
The Effect Of Independence and Work Schedule On Employee Performance and Job Satisfaction In The Department Agriculture, Marine and Fisheries Parepare City
Authors: Parman Parman
Published: December 2022

This study aims to determine 1) The Effect of Independence on Employee Performance, 2) The Effect of Work Schedule on Employee Performance, 3) The Effect of Independence on Job Satisfaction, 4) The Effect  of Work Schedule on Job Satisfaction, 5) The Effect of Independence on Employee Performance and Job Satisfaction  6) The Effect of Work Schedule on Employee Performance and Job Satisfaction  . The data collection techniques used are Observation and Questionnaire Division. The population in this study was all employees who worked in the Agriculture, Marine and Fisheries Service of Parepare City which amounted to 107 respondents. The analysis technique used is the SEM-PLS (Structural Equation Modelling-Partial Least Square) analysis technique using the WarpPLS 7.0 application.  Theresearch objectives  are 1) Independence does not have a Significant effect on Employee Performance, 2) Work Schedule Has a significant effect on Employee Performance, 3) Independence has a significant effect on Job Satisfaction, 4) Work Schedule has a Significant effect on Job Satisfaction, 5) Independence does not have a significant effect on employee performance and is not mediated by Job Satisfaction, 6)  Work Schedule on Performance has a significant effect on Performance and is mediated by job satisfaction and experiences partial or partial mediation.
The Influence of Transformational Leadership Style on The Work Motivation of Parepare City Health Service Employees With The Work Environment As a Mediation Variable
Authors: Tasrif Tasrif , Asisah Nur
Published: December 2022

The Influence of Transformational Leadership Style On Employee Work Motivation With Work Environment As A Mediation Variable". This study aims to know 1) The influence of transformational leadership style on work motivation, 2) The influence of leadership style on the work environment 3) The influence of the work environment on work motivation, 4) The influence of leadership style on work motivation with the work environment as a mediator. The data collection techniques used are observation and distribution of questionnaires. The population in this study was all employees of the ASN (State Civil Apparatus) of the Parepare City Health Service which amounted to 348 with a proportionate stratified sampling technique randem sampling 50% peer sample so that a peer sample of 177 respondents was obtained.the data acquisition technique used was the SEM-PLS (Structural Equation Modeling-Partial Least Square) analysis technique.  by using the WarpPLS 7.0 application. The results of this study are 1) Transformational leadership style has a significant effect on employee work motivation, 2) Leadership style has a significant effect on the work environment, 3) The work environment has a significant effect on employee work motivation, and 4) Leadership style has a significant effect on employee work motivation and is mediated by the work environment
Зміст та технологічна схема геотектонічних досліджень при геологічному картуванні фундаменту Українського щита
Authors: Kyrylyuk V. P. , Shevchenko O. M.
Published: December 2022

Одним із важливих результатів державного геологічного картування є уявлення про тектоніку та історію геологічного розвитку територій зйомки. За своїм призначенням вони мають бути основним синтезуючим підсумком виконаних робіт та одночасно науковою основою подальших прогнозно-металогенічних досліджень. Тим часом у сучасній літературі досі відсутні чіткі визначення змісту та методики регіональних геотектонічних досліджень, у тому числі під час проведення державної геологічної зйомки. Це відбивається на повноті збирання, використання та узагальнення необхідних даних, особливо щодо ранньодокембрійського кристалічного фундаменту щитів давніх платформ, у тому числі Українського щита. У цій статті дається розгорнуте визначення регіональних геотектонічних досліджень та їх складових частин – геотектонічного аналізу та синтезу. У розвиток цих визначень пропонується методика – технологічна схема – геотектонічного аналізу при геологічному картуванні, що складається з низки послідовних операцій. Вони спрямовані на виявлення структурних та речовинних особливостей території дослідження, зумовлених тектонічними рухами та пов'язаними з ними процесами. Результати геотектонічного аналізу є основою геотектонічного синтезу, метою якого є створення геоеволюційної моделі розвитку досліджуваної території. Спеціально розглянуто питання геотектонічної періодизації раннього докембрію, на якій має базуватись ця модель. Сучасні дані про склад та структурну позицію головних стратигенних метаморфічних комплексів щитів дозволяють виділити два великих етапи ранньодокембрійської еволюції земної кори: еогей – етап нечіткої (догеоблокової) геотектонічної диференціації та протогей – етап чіткої геоблокової геотектонічної диференціації. Запропонована методика опробована під час складання оглядових тектонічних карт фундаменту Українського щита. Вона є першим досвідом неупередженого регіонального геотектонічного дослідження нижнього докембрію та може бути використана при проведенні державного геологічного картування як доповнення до існуючих інструкцій.
Перспективи підвищення вуглеводневилучення нафтогазових родовищ у рамках декарбонізації енергетичного сектору України
Authors: Matkivskyi S. V.
Published: December 2022

Більшість підприємств важкої промисловості України працюють на викопному паливі та є морально і фізично застарілими. В результаті спалювання вугілля для вироблення енергії та забезпечення потреб промисловості з кожним роком зростає концентрація техногенного діоксиду вуглецю в атмосфері. Питання врегулювання екологічних проблем неодноразово піднімалися та піднімаються світовою спільнотою, усвідомлюючи можливі наслідки для людського існування. Кліматичні норми в цілому світі з кожним днем стають все більш вимогливішими та жорсткішими і вимагають невідкладних дій щодо зниження рівня промислових викидів діоксиду вуглецю в атмосферу. Для вирішення проблем, пов’язаних зі зміною клімату та глобальним потеплінням, слід вживати заходів з швидкого уловлювання діоксиду вуглецю з подальшим його зберіганням без контакту з навколишнім середовищем. Перспективним напрямом на шляху до декарбонізації енергетичного сектору України є використання техногенного діоксиду вуглецю в нафтогазовій промисловості для інтенсифікації дорозробки виснажених нафтогазових родовищ. На основі результатів моделювання встановлено високу технологічну ефективність впровадження технологій нагнітання діоксиду вуглецю з метою регулювання процесу обводнення продуктивних покладів та видобувних свердловин. Результати проведених досліджень свідчать про те, що у випадку впровадження технології нагнітання діоксиду вуглецю в поклад горизонту В-16 Гадяцького нафтогазоконденсатного родовища підвищується кінцевий коефіцієнт вилучення газу на 2,95 %, а конденсату – на 1,24 % від залишкових запасів вуглеводнів. Впровадження вторинних та третинних методів підвищення вуглеводневилучення з використанням діоксиду вуглецю дозволить знизити навантаження на навколишнє середовище та підвищити ефективність розробки розвіданих запасів в умовах значного дефіциту вуглеводневої сировини в Україні.
Процеси міграції пестицидів і поводження з пестицидами у геологічному середовищі
Authors: Osokina N. P.
Published: December 2022

Досліджено вміст пестицидів у підземних водах та інших об’єктах довкілля окремих регіонів України. Методом газової хроматографії визначено стійкі хлорорганічні пестициди: ДДТ та його метаболіти, ГХЦГ та його ізомери, альдрин, гептахлор; фосфорорганічні пестициди: метафос, карбофос, фосфамід, фозалон; фторвміщуючі пестициди: трефлан та ін. З 1960 по 2011 р. на сільгоспугіддя України надійшло 2 млн 85 тис. т пестицидів. Навантаження пестицидів на ґрунти сільгоспугідь перевищили захисні властивості природного середовища, що призвело до їх потрапляння в підземну геосистему. За нашими розрахунками (за 10-річний період), середньостатистична концентрація ХОП в основних водоносних горизонтах України становить за сумою ДДТ 3,6·10⁻⁵ мг/дм³; за сумою ГХЦГ – 3·10⁻⁵ мг/дм³. У воді свердловин одночасно виявлено до 8 сільськогосподарських забруднювачів, сумарний ефект дії яких на організм людини не вивчений.Проведено широкий комплекс польових та лабораторних експериментальних робіт із вивчення хімічного стану підземних вод еоценового водоносного горизонту (вмісту пестицидів) у Київській області; досліджено головні процеси і фактори, які впливають на міграцію пестицидів у підземній геосистемі, та формування хімічного складу підземних вод зони активного водообміну у різних гідрогеологічних умовах. Узагальнено публікації і виконано власні дослідження по процесах міграції в системі “пестицид–грунт–вода”. Нами зроблено висновки щодо міграції пестицидів у підземній геосистемі.Розроблено методологію застосування пестицидів у геологічному середовищі. Необхідний контроль і сувора регламентація обсягів того чи іншого класу пестицидних препаратів при внесенні їх на сільгоспугіддя. Необхідний регулярний контроль якості підземних вод. Необхідно проводити моніторинг забруднення пестицидами підземних вод та інших об’єктів природного середовища пестицидами. Результати нових аналізів по забрудненню об’єктів природного середовища пестицидами необхідно порівнювати з ГДК. Якщо рівні забруднення об’єктів природного середовища пестицидами будуть збільшуватися (перевищення ГДК), то треба зменшити навантаження пестицидів на сільгоспугіддях та замінити старі пестициди на нові. Необхідно формувати збалансовану систему природокористування в контексті сталого розвитку та впровадження екологічних та інноваційних технологій в сільському господарстві, а також сучасні механізми національної екологічної політики.
Faktor yang Mempengaruhi Kelompok Usia Muda Mengunjungi Kafe Selama Pandemi Covid-19
Authors: Meilinda Helza Putri  , Hanson E. Kusuma  , Allis Nurdini
Published: December 2022

Kelompok usia muda mengalami perubahan pola aktivitas di luar rumah sejak adanya pandemi Covid-19, salah satunya adalah aktivitas mengunjungi kafe. Pertimbangan terhadap kafe yang akan dikunjungi pun dipertimbangkan demi memenuhi kebutuhan ruang mereka saat berada di dalamnya. Penelitian ini dilakukan dalam dua tahap penelitian, pada tahap pertama menggunakan metode kualitatif dengan mengumpulkan data yang dilakukan melalui penyebaran kuesioner daring yang bersifat terbuka (open-ended) dan pemilihan sampel dilakukan secara bebas (non-random sampling), dengan hasil yang didapatkan bahwa terdapat beberapa faktor yang merupakan preferensi kelompok usia muda saat hendak mengunjungi kafe selama pandemi Covid-19, dan digunakan sebagai variabel penelitian kedua. Tahap kedua dilakukan dengan metode kuantitatif dengan menggunakan analisis distribusi, faktor analisis, dan korelasi multivariat, Hasil analisis pada penelitian ini didapatkan bahwa kebutuhan ruang kelompok usia muda terhadap kafe selama pandemi Covid-19 dipengaruhi oleh kategori fisik dan kategori kegiatan. Aspek yang berpengaruh terhadap kategori fisik adalah aspek ruang dan aspek yang berpengaruh terhadap kategori kegiatan merupakan aspek perilaku.
Experimental Simulation of Hydraulic Jump for the Study of Sequent Depth Using an Obstruction
Authors: Singh Daisy , Paswan Abhishek Prakash , Anbukumar S. , Meena Rahul Kumar
Published: December 2022

Hydrological jump characteristics in a rectangular open channel flume with sluice gates at both ends are the focus of this article. Among the many aspects of hydraulic jump that have been examined analytically and experimentally are: (i) Sequent depth relation (y2y1), (ii) Length of the jump, (iii) Relative loss of energy (ELE1), (iv) Water profile of the jump. There was a total of 15 inflow tests conducted. With values between 1.5 and 1.7, Froude’s number displays considerable variation. The results show that when the slope increases, the sequent depth ratio, leap length, and Relative energy loss all decrease. The fluctuation of the relative energy loss (ELE1) with Pre-jump Froude’s number (F1) for different slopes is also indicated by the graph. The graph also depicts the water profile of the leap. Continuous flow is shown by the relatively uniform discharge at each location.
Determination of Water-Saturated Tailings Compaction Characteristics During Geotechnical Massif Formation
Authors: Lolaev Alan , Oganesyan Aleksan , Badoev Aleksandr , Oganesyan Emil
Published: December 2022

The research focuses on the tailing dump, which is located in the Norilsk industrial region’s (Northern Siberia) territory. The difficulty of precisely calculating the period of tailings consolidation presented itself to the authors while they conducted research on improving the technological parameters of the tailings alluvium. Without resolving this issue, it is impossible to improve the technology of the tailings alluvium. In order to assure safety and efficiency at all phases of construction and to strengthen the stability of the examined tailings, a sophisticated set of model tests and calculations was conducted. This work provided the foundation for modifying the work techniques. The method for defining the maximum density at the optimum humidity, when the formation of a geotechnical massif at the tailing dam’s inwash occurs, has been devised on the basis of laboratory testing. The findings from study may be effectively used as the foundation for building tailing dams.
Technical Characteristics and Development Trend of Russian High-Rise Buildings
Authors: Abramovich Lapidus Azariy , Yan Jingjing
Published: December 2022

The article briefly describes the technical characteristics of Russian high-rise buildings. It presents an in-depth study and analysis of the historical background and the main problems of Russian high-rise buildings today and assesses the trends in the Russian high-rise construction industry. This study is based on an extensive review of the scientific literature, focusing on the historical development and technical characteristics of tall buildings in Russia, The current shortcomings and development prospects of high-rise buildings in Russia are analyzed, and the analogy and graphic methods. Within the framework of which goals and objectives were formulated, methods and means were selected, criteria for evaluating empirical information and analysis results were established. It is hoped that it can bring some reference to Russian high-rise construction, enhance the understanding of Chinese construction enterprises in Russia and research universities about Russian high-rise buildings, and lay the foundation for smooth development and research of construction projects.
PVC Waste Plastic Bottle Strip Used for Improvement of Engineering Properties of Clayey Soil
Authors: Kumar Amrendra , Singh Ajay , Roy Bishwajit , Bhattacharjee Shiladitya , Bhowmik Tanmay
Published: December 2022

The influence of scrap plastic drinking bottles on the strength and swelling qualities of lean clay is investigated in this paper. Before use, waste plastic bottles (WPB) were cut into 4 mm strips and mixed with soil in proportions of 1, 2, 3, 4, and 5% (dry weight of soil). The prepared materials were subjected to three standard tests: Proctor test, swelling, and strength penetration test California Bering Ratio (CBR). The results of tests revealed that WPB have a substantial impact on the clay’s compaction, swelling, and strength qualities.
Research and Application of Construction Technology of Intelligent Functional Area Based on BIM+GIS in Highway Engineering
Authors: Pan Fang , Mao Yijia
Published: December 2022

In order to solve the problems of poor timeliness of data collection, scattered information management and difficulty of quality traceability in the process of highway construction, this paper, according to the development needs of the industry, uses information technology to carry out the top-level design and function development of intelligent functional area around personnel, equipment, materials, process engineering method, environmental protection and quality safety in the process of engineering construction, and through the application of actual engineering, realize The transformation and development of engineering construction management has important application significance and reference value.
Preliminary Study on Rainfall Infiltration of a Homogeneous SAP-Enhanced Cover
Authors: Lu Shaopeng , Wu Yuedong , Liu Jian , Wu Huiguo
Published: December 2022

In order to improve the anti-seepage performance of the cover, this paper proposed to use super absorbent polymer (SAP) particles to improve the water storage capacity of the soil, and mixed them into the soil to build an SAP composite soil cover, but the law of water movement in which is not clear. In this paper, a series of soil column model tests were carried out to measure the changes of pore water pressure and volume water content in SAP composite soil cover at different depths. The results showed that under the extreme rainfall condition of once-in-a-century in Nanjing, the infiltration amount of SAP was only 12.7 ml, while that of homogeneous sandy soil cover is 2510 ml, indicating that the anti-seepage performance is good.
Urban Land Subsidence Analysis Based on Oblique Photogrammetry 3D Models and InSAR Technology
Authors: Liu Yi
Published: December 2022

With the rapid socio-economic development in the past three decades, the pace of urban construction in Shenzhen has been accelerating, and the ground subsidence phenomenon in Shenzhen has been intensifying. The widespread ground subsidence in Shenzhen produces important hazards to the urban environment and important urban infrastructures, leading to disasters such as tilting and collapse of buildings, and back-up of seawater. In this paper, based on satellite synthetic aperture radar interferometry (InSAR) technology to obtain the overall subsidence information in Nanshan District, Shenzhen, we use high-precision laser point cloud, 3D building model and other data to monitor the specific subsidence information of buildings and carry out the risk assessment of housing buildings in Nanshan District to provide scientific decision-making basis for its subsidence cause analysis and prevention and control.
Study on Cycling Damage of Abrasion and Carbonization on Ship Lock Concrete
Authors: Han Xuesong , Sun Yong , Xiao Huaiqian , Dai Sheng , Ding Yue , Xu Fei
Published: December 2022

In the actual working conditions, the ship lock concrete is affected by the friction of the ship’s hull and erosion and wear of the ship’s traveling wave during the flood period and is damaged by CO2 in the air during the waterfall period. To study the performance degradation law of the ship lock concrete under this working condition, the underwater method was used to approximate the physical wear in the rising water period, and the accelerated carbonization was used to simulate the CO2 erosion in the falling water period. The duration of abrasion and carbonization are determined according to the design service index of the lock and the characteristics of navigability. The degradation of the concrete is reflected by the carbonation depth and anti-abrasion strength, and the composition and pore structure evolution of the concrete is characterized based on the Mercury Intrusion Porosimetry. The analysis show that the concrete of the inland ship lock exhibits a more obvious deterioration trend under the action of surface physical wear and carbonization cycle, and the abrasion accelerates the carbonization reaction to a certain extent.
Application of Prestress in Construction of Building Engineering
Authors: Lu Chao , Wang Kenan , Han Shiliang , Shi Zhenzhe , Zi Jiantao , Lu Qunfu
Published: December 2022

With the acceleration of the urbanization process, the housing construction industry is increasing, and it also promotes the continuous improvement of its construction technology. The pre-stressed construction technology of housing construction is one of the new technologies promoted by the Ministry of Construction. At this stage, the pre-stressed construction technology of housing construction is gradually widely used and plays a very important role in the construction of housing. Adopting bonding prestressing technology in construction projects can solve the span problem of concrete structures and enhance the load capacity of equipment. In the process of project construction, it can effectively reduce the size of the concrete cross-section and the amount of steel bars, improve the space utilization rate, and increase the economic benefits of the project. The application of prestress in engineering construction has a very good effect.
Application of Basalt Fiber Synchronous Surface Dressing Technology in Highway Maintenance in Qingyang Area
Authors: Sun Zhigang , Pan Xiaogang , Dong Dawei
Published: December 2022

Asphalt fiber synchronous surface dressing has good stress absorption and dispersion ability. It has a network winding structure, which can effectively absorb, diffuse and redistribute the local concentrated stress in the pavement structure, and effectively reduce the stress in the pavement structure. Asphalt fiber synchronous surface dressing reduces the generation of cracks in the pavement structure layer, and prevents and suppresses the occurrence of reflection cracks. For three consecutive years, Qingyang highway development center of Gansu Province has applied asphalt fiber synchronous surface dressing in the managed and maintained trunk highway, which has effectively improved the traffic condition of the pavement, extended the service life of the highway and achieved good results.
Longitudinal Force Distribution Law of Continuously Welded Rail on Suspension Bridge over Kilometer
Authors: Gan Rui , Xu Hui , Ma Xueping , Xiao Yunfei
Published: December 2022

Taking a (130+1060+90)m railway suspension bridge as the research object, and taking the track-beam foundation model as the core, a simulation model of the coupling between the large span suspension bridge and the double track is constructed, including steel truss girder, main cable, suspender, orthotropic steel bridge deck, concrete bridge tower and track structure. The distribution law of the stress and deformation of the rail under the effect of temperature load, vertical load and braking load is revealed. The main conclusions are as follows: in order to optimize the stress and deformation of the rail, it can be considered to arrange the rail expansion regulator on the bridge. Setting the regulator at both ends of the steel truss girder of the bridge can significantly reduce the extreme value of rail stress and deformation; when the two lines are loaded simultaneously, the vertical deformation of the rail in the middle of the main girder reaches 2m. In this case, the bending force is the load that needs to be calculated more than the expansion force.
Parametric Study of Uplifting Capacity of Pressure Grouted Helical Anchor in Marine Clay
Authors: Lin Xiangjun , Zheng Jiachang , Qi Hao , Zhang Zhenqin , Zhuang Xiaoxuan , Ding Wenlong , Cheng Hao
Published: December 2022

The pressure grouted helical anchor is an innovative soil-cement helical anchor using the simultaneous drilling and pressure grouting technique. This paper presents a field study and numerical simulation to analyze the load-displacement behavior of single pressure grouted helical anchor anchored in marine soft soil deposit. Three full-scale anchors were tested under monotonic tension loading to analysis the effect of the Influence of helix plates configuration on lifting capacity. A symmetric three-dimension finite element method (3-D FEM) model was created and calibrated based on the site investigation and the field test data. The calibrated 3-D FEM model was utilized to examine the failure criterion of the pressure grouted helical anchors according to the load diffusion mechanism and the anchor resistance profile. A parametric study was conducted to propose an equation for estimating the uplift capacity of the pressure grouted helical anchors. The outcome of the research will lead to the development of design guidelines for the uplift capacity of the pressure grouted helical anchors in clay.
Update the Reliability of Concrete Subject to Chloride and Carbonation-Induced Corrosion
Authors: Cao Mai , Li Quanwang , Xiao Xiong , Yuan Ze , Zhang Yaotian , Wang Zeyu
Published: December 2022

Reliability of concrete that are exposed to marine environment can be substantially threatened by chloride and carbonation-induced corrosion of reinforced concrete. The metric of reliability quantifies this risk in the form of reliability or probability of occurrence. Moreover, environmental observations such as long-term structural health data and testing specimen in exposed station can be leveraged to improve the updating accuracy, which facilitate strategic decision-making for structural inspection, maintenance, and rehabilitation. However, due to the complexity of physical models, the computational process can be also challenging. To overcome this limitation, RUAK (Reliability Updating with Adaptive Kriging) has been proposed to incorporate the adaptive Kriging within the reliability updating framework. Therefore, this paper explores the reliability analysis of a chloride erosion example with RUAK.
Study on the Temperature Field and the Crack Prevention Countermeasure During the Abutment Construction in the Middle East
Authors: Wen Chengyong , Zhang Chaoqiang
Published: December 2022

Base on the concrete work of the abutment of belt conveyor bridge of JIGCC project in Jazan, Saudi Arabia, the finite element model of the abutment hydration heat reaction during the construction and maintenance period is established by taking the actual field situation as the input boundary condition. The model is verified by the field temperature monitor data. It shows that the temperature curve of the finite element model is in good agreement with the monitor data, and the finite element model is accurate enough. The stress due to temperature is within the allowable range, and the risk of cracking under the pouring scheme is low. Further, influence factors of the hydration heat reaction are analyzed from the aspects of concrete external surface insulation method, molding temperature and ambient temperature. Combined with the field construction experience in Saudi Arabia, it put forward some crack prevention countermeasures of mass concrete in the Middle East.
Research on Renewable Energy Architectural Integration Technology and Building Form
Authors: Du Yan
Published: December 2022

Architectural technology will have an impact on architectural form. With the transformation of industrialized society to post industrialized society in the 21st century and the comprehensive popularization of information technology, the cross interaction of AI technology, automation engineering technology, material science and other fields has promoted the qualitative changes in the design and manufacturing technology of architectural structure, structure and materials. With the energy crisis and the emergence of energy-saving buildings, energy-saving buildings have produced new architectural forms under the influence of energy-saving ideas and energy-saving technologies. Through a large number of contemporary physical buildings, we can see the influence of architectural technology on architectural forms and the relationship between technology and construction.
Critical Speed of Subgrade with Arbitrary Complex Section: In Wave Excitation and Propagation View
Authors: Wang Rui , Ren Xiang , Hu Zhiping , Shi Wei , Ma Jiakuan
Published: December 2022

As the train speed increases, there are two typical dynamic response patterns of subgrade, i.e. with or without wave propagation. Once the wave propagation occurs, the track displacement begins to increase sharply and the environmental vibration becomes more and more significant. The determination of the critical speed at where waves are emitted is significant for relative investigation and engineering practice. To this end, the dynamic behaviors of a track-embankment-ground system in speed-frequency domain were discussed and a determination approach of the critical speed was proposed. To confirm the prediction ability, verifications were carried out on typical semi-infinite ground and track-embankment-pile reinforcement ground system. The results indicate that the phase plot performs satisfactory in predicting the critical speed of subgrade with arbitrary section. The appearance of phase shift reflects the intrinsic feature of energy dissipation with radiation of waves.
Research on Key Construction Technology of Urban Expressway Viaduct Connection
Authors: Zhou Zhendong
Published: December 2022

With the increase of traffic pressure on the main roads in the central areas of major cities, the new high-speed elevated corridors have become a new way to relieve urban traffic congestion. However, for prosperous urban areas, cast-in-place piers and cap beams cannot be used well due to the long construction period and harsh construction conditions. At this point, prefabricated piers and prefabricated cover beams can well solve the above problems. However, in actual engineering construction abroad, especially in Africa, there are also practical problems such as backward technology, shortage of materials, and limited local technical skills. Therefore, this paper takes the prefabrication and connection construction technology scheme of prefabricated piers and cover beams of Nairobi Expressway in Kenya as an example to study the key construction technology of prefabricated viaduct connections in Africa for other similar projects.
Study on Compression Mechanical Properties and Acoustic Emission Characteristics of Roadside Filling Body
Authors: Cheng Lichao , Lu Bin , Li Wengui , Li Xinwang , Wang Haixuan , Long Hang , Zhang Xuedong
Published: December 2022

In order to study the compressive strength and crack evolution form of roadside filling body, the strength and acoustic emission of filling body under different loading rates were studied by using PCI-2 acoustic emission tester and pressure testing machine. The crack evolution process of the specimen under different conditions was analyzed, and the compression failure mode, failure mode and internal energy change law of the filling material were obtained, and then the deformation failure and crack evolution law of the filling material were mastered. The results show that the mechanical properties of the filling body are related to the loading rate, while the peak strain is not obviously affected by the loading rate. The cumulative Hit number and cumulative energy of filling materials increase with the increase of loading rate. The higher the Hit number and energy of the filling material, the earlier the internal damage occurs, the earlier the crack evolves, and the easier it is to form instability failure. The abrupt change of the cumulative Hit number and cumulative energy value with time can be used as a reference for entering instability failure.
Research on Information Management of Prefabricated Buildings Under EPC Mode
Authors: Gao Yuhao , Li Jie
Published: December 2022

With the development of modern society, labor cost becomes more and more expensive, and the issue of green intelligence is crucial. Therefore, buildings like prefabricated buildings, which consume less energy, are green and less dependent on labor, have attracted widespread attention. However, due to the construction characteristics, it is difficult for the traditional management mode to meet its information management requirements [1]. This paper discusses the establishment of an information management platform based on the EPC general contracting management model, which interacts and shares information with all participants, and integrates information technology such as BIM (Building Information Modeling), RFID (Radio Frequency Identification), IOT (Internet of Things), and establishes corresponding models according to their characteristics. These models provide efficient information management means in four stages: design, production, construction, and operation and maintenance, and improve the management efficiency of the whole process of prefabricated buildings.
Experimental Study and Numerical Simulation of Structure Optimization of Baffle-Drop Shaft
Authors: He Mengdi , Yang Qian
Published: December 2022

As an efficient energy consumption hydraulic structure applied in deep-buried tunnel drainage system, the energy consumption rate and inflow capacity of baffle-drop shafts were been influenced seriously by the shaft structural parameters. Based on a scale model test and the Realizable k–ε model, the flow regimes, maximum inflow discharge, outflow velocity, and energy consumption rate of drop shafts with different baffle angles and baffle spacings were experimentally and numerically investigated. The results show that there are three flow regimes in the discharge process of different inflow rates: free-fall flow, critical flow, and wall-limited flow. Among them, the drop shaft with the free-fall flow shows the optimal energy consumption effect. Increasing the baffle angle in a certain range is encouraged to the transformation of the flow regime from the wall-limited flow to the free-fall flow. Therefore, the drop shaft with a proper baffle angle is crucial to the structural design of baffle-drop shafts. Considering the optimal energy consumption rate and the maximum flow capacity, the baffle-drop shaft with a 9°∼11° baffle angle and 19.4 cm baffle spacing performs the best rational structural parameters.
Effect of Tuned Inerter Dampers (TID) on the Vibration Control of Adjacent Structures
Authors: Wei Jinyuan , Liang Qigang , Li Luyu
Published: December 2022

In this paper, the effect of viscous dampers (VD) on the control of adjacent structures is firstly discussed, and then the tuned inerter dampers (TID) is utilized to enhance the control performance of adjacent structures. The relative displacement and absolute acceleration responses of the TID controlled adjacent structures are optimized and evaluated by the H∞ performance of the transfer functions. The results show that there is an optimal damping ratio to minimize the displacement response of the adjacent structure when VD is used, but the damping required corresponding to the optimal performance are relatively larger. Instead, the use of TID gradually enhances the control effect with the increase of inertance-mass ratio and the control effect of TID on the structure is more significant at small inertance-mass ratio. Compared with VD, TID only requires smaller damping to achieve a similar performance to VD.
Three-Dimensional Stability Analysis and Numerical Simulation of Slope Failure Under Seismic Loading
Authors: Li Minhong , Chen Gao
Published: December 2022

The frequent earthquake disasters in mountainous areas in recent years have brought great challenges to the slope safety. According to the upper bound theorem, strength reduction method and quasi-static method, a 3D failure model under earthquake is established to study the slope safety. The expression of slope safety factor is derived and the solution is optimized. Each parameter’s influence on safety factor is analyzed. And the potential fracture surface under different working conditions was analyzed by using the numerical software 3DEC 5.20. The results indicate that it decreases with the increase of slope angle, horizontal seismic force, soil unit density, slope height, and aspect ratio, and increases with the increase of cohesion and friction angle between soil masses. The potential fracture surface increases with the raise of horizontal seismic force, friction angle, cohesion and aspect ratio, and decreases with the decline of soil unit weight and slope angle. The influence of vertical seismic force on safety factor and potential fracture surface is very small and can be almost ignored.
Study on Interaction Mechanism of SBS and Asphalt
Authors: Li Qi , Wang Haitao , Chen Guixiang , Zhang Taoli , Zhou Jiawang
Published: December 2022

To reveal the inner connection between SBS and base asphalt. Firstly, a reasonable asphalt molecular model is established to verify the rationality of the model. Then, MD simulation was carried out with binding energy and diffusion coefficient as evaluation indicators, and the diffusion distribution state of polymer molecules in matrix asphalt was analyzed by FM. By analyzing the above results, the binding energies of SBS and light components (aromatics and saturated) are (170.615 kcal/mol, 156.151 kcal/mol) and the binding energies of heavy components (asphaltene and resin) are (50.262 kcal/mol, 90.085 kcal/mol), indicating that the SBS polymer and the light component are more closely related. The addition of SBS promotes the enhancement of its interaction, and the molecular diffusion rate of the asphalt system generally decreases. It can provide theoretical support for the development of high-performance SBS modified asphalt materials.
Theoretical and Numerical Study on the Anti-Slide Mechanism of Slope with Different Anti-Slide Pile Parameters
Authors: Gao Wenmei , Jin Lingxiao , Liu Ze , Zhang Biao , Wu Yating , Ma Zhaoyun
Published: December 2022

The damage of rock slopes is often very sudden, and a series of reinforced concrete anti-slide piles are set on the slope, which can effectively control the landslide and ensure the safety of people’s lives. In this paper, through numerical simulation and theoretical analysis, the parameter sensitivity analysis of anti-sliding piles with different cross-sectional shapes and different pile spacings, the displacement and stress laws of anti-sliding piles under different parameter changes are obtained. At the same time, through theoretical analysis of the anti-sliding mechanism of anti-sliding piles under different parameters, it provides some theoretical guidance for the parameter selection of anti-sliding piles in actual engineering construction. The result shows: the distribution law of stress and displacement under different parameters is analyzed, and it is found that the anti-sliding ability of circular anti-sliding piles is weaker when the pile spacing is larger. When the pile spacing of the rectangular anti-sliding pile is large, the load it can bear is large. When the pile spacing is too wide, the soil arch effect gradually weakens, and the effect of anti-slide piles is weakened.
Study on Response Spectra in the Loess Region of Gansu, China
Authors: Xu Rong , Wang Lanmin
Published: December 2022

The effects of hypo-central distances and magnitude on the acceleration response spectra in this study are based on 24 sites in Gansu province of China, the sites all spread over the loess regions. The normalized acceleration response spectra with 5% damping were determined for 106 strong ground motions contained horizontal and vertical components, recorded at these sites in the magnitude ranging from 3.7 to 7.0. It is shown that the shape of acceleration response spectrum is affected by not only the magnitude but also the hypo-central distances. The geometric mean of the PGA of two horizontal components in the existing datasets mostly ranges between 0.0001g and 0.1g. The peak of maximum horizontal spectral acceleration is between 0.01 and 0.02s in study area. The maximum value of vertical spectral acceleration is about 0.3g. The study shows that the influence of magnitude is not obvious on spectral shape, but on the amplitude. The hypo-central distances also affect the spectral shapes as well as the amplitude. Combined with the seismic design code of this area, give a more suitable local loess site seismic design standard.
Unconfined Compressive Strength Test and Microstructure Analysis of Fibrous Soil-Cement
Authors: Li Xiaomin , Huang Xubin , Zhang Ying , Ding Xinan , Zhu Wenxiu , Lu Qun
Published: December 2022

Adding fiber into soil-cement can improve its compressive and tensile strength. In engineering application, soil-cement can meet the requirements of mechanical properties and economic cost by adding a certain proportion of fiber, which has great significance for ensuring engineering quality, and reducing cost and increasing efficiency. In order to reflect the strength characteristics of soil-cement mixed with fiber and the performance of fiber constrained lateral deformation, the unconfined compressive strength test of soil-cement with fiber was studied in this paper. The results show that the addition of fiber can improve the mechanical properties of soil-cement, reduce the development of cracks and improve the ductility of soil-cement. Under the condition of the same incorporation ratio, the compressive strength of basalt fiber to soil-cement is improved more than that of polypropylene fiber. The test results can provide technical support and practical reference for long-term engineering safety.
Molecular Dynamics-Based Study of the Mechanism of Carbon Nanotubes on the Capacitating Effect of SBS/Bitumen Composites
Authors: Yang Yi , Liu Haochen , Li Qi , Zhang Taoli
Published: December 2022

Computer simulations of SBS modified bitumen and carbon nanotube/SBS modified were carried out to have research on the mechanism of the capacitating effect of carbon nanotubes on SBS-modified bitumen. Through molecular dynamics simulation, the binding energy (Ebinding), radial distribution function (g(r)) and mixing energy (Emixing) of the composites were analyzed according to the Velocity-Verlet algorithm, and the enhancement effect of carbon nanotubes on the compatibility of SBS modified bitumen composites was quantified and the influence law of carbon nanotubes on the technical indexes was analyzed. The results showed that the introduction of carbon nanotubes significantly improved the compatibility of SBS/bitumen system. the binding energy between SBS polymer and bitumen in SBS modified bitumen was 169.91 kJ/mol, while the binding energy of carbon nanotubes/SBS modified bitumen system was 185.72 kJ/mol. the source of the binding energy was analyzed, and this leads to the conclusion that the dominant energy was van der Waals energy.