bluuebunny/crossref_metadata_2025 huggingface dataset:
Solution Approach to the Minimum Spanning Tree Problem in Tsukamoto Fuzzy and Fermantean Fuzzy Environments
Authors: De Haas Desli , Palembang Citra , Rumakefing Aziz
Published: December 2024

Solving Fuzzy Minimum Spanning Tree (FFMST) and Fuzzy Tsukamoto using modified Prim Algorithm for Undirected Graphs and modified Optimal Branching Algorithm for Directed Graphs in FFN environment. Since the proposed Algorithm includes FFN ranking and Arithmetic Operations, we use the improved FFN scoring function to compare the edge weights of the graphs. With the help of Numerical examples, the solution technique for the proposed FFMST model is explained.
It aims to modify the Prims algorithm for oriktade graphing and the optimal result processing algorithm for re-graphing in Fuzzy Fermatean ( FFN )-miljö. They utilize the finite FFN function and the operation of fuzzy function operations to ensure victory in graphing. The fuzzy-inference process is based on the Tsukamoto method and also to get the best result from the existing catch.
Numerical examples of presenters to perform the tasks of missing presenters. The results are seen in the effective Prim algorithm modifier lost Fuzzy Fermatean MST -problem for genome oriktade generator generated at minimum cost and fall with local banks. It is an optimal business growth modifier to optimize services for lenders, such as communication between financial consultants and commercial banks. This method will be effective and increase the desired parameters.
Tsukamoto Fuzzy -This method includes a fuzzy-inference process to get the best answer in the minimum spanning tree problem. Kantvikter functions based on levels of capability and range functions. Theminimum spanning tree is achieved by the Prims algorithm, which may be performed with fuzzy values first.
Implementation of Fuzzy Logic Sugeno on a Website-Based for Flood Monitoring and Early Detection System
Authors: Pohan Fadlyani , Mukti Qamal  , Said Fadlan Anshari
Published: December 2024

Floods are common in Indonesia, especially in Aceh, and are caused by various factors, such as high rainfall during the rainy season, resulting in material and life losses. Developing a flood monitoring and early detection system is essential to reduce the negative impact of flooding. This research introduces the implementation of the Fuzzy Logic Sugeno method on a web-based flood monitoring and early detection system, which uses ESP32 and accurate sensors to monitor water level and water flow. Testing is done through two approaches. First, the water level and flow parameters were manipulated manually to test the system's response to changing conditions. Secondly, tests were conducted automatically until the prototype aquarium was complete to see the system's ability to detect potential flooding. The test results show that the system can automatically recognize potential flooding, take preventive actions, such as opening or closing floodgates, and provide real-time condition information through a Website.
Comparison of K-Means and K-Medoids Algorithms for Clustering Poverty Data in South Sumatra Using DBI Evaluation
Authors: Akhda M. Dandi , Tania Ken Ditha
Published: December 2024

This research focuses on the implementation and comparison of the K-Means and K-Medoids algorithms that function as poverty data clustering in South Sumatra Province, the poverty data is taken from the Central Statistics Agency of Indonesia (BPS Indonesia). This research also aims to analyze the poverty level in South Sumatra Province by including additional variables such as average years of schooling and per capita expenditure in the community in each regency or city in South Sumatra Province. Data clustering is done by both algorithms and then the performance value is Evaluated using Davies Bouldin Index DBI shows that K-Means gives better results, with a lower DBI value (0.204 at K=5) while K-Medoids has a DBI value of 0.239 at K=5, which indicates more compact and separated clusters. The superiority of K-Means is due to the homogeneous and minimal outlier characteristics of the dataset, which makes the centroid approach more optimal than medoids in K-Medoids. With these results, K-Means was chosen as the best algorithm for clustering poverty data in the region. The use of the K-Means algorithm produces a pattern in clusters related to education, economic inequality, and poverty distribution in various regions in South Sumatra. This implementation provides insight into how data clustering techniques can be applied to socio-economic data to provide policy makers in a region with information about the region, especially information about poverty-stricken areas.
Comparative Analysis of the Osmotic Fragility of Erythrocytes Across Various Taxa of Vertebrates
Authors: Gerda B. A. , Skverchinskaya E. A. , Andreeva A. Yu. , Volkova A. A. , Gambaryan S. P. , Mindukshev I. V.
Published: December 2024

The osmotic fragility of erythrocytes serves as a crucial parameter indicating the cells' ability to endure variations in the osmotic environment. Disorders in this attribute are often correlated with a spectrum of pathologies, encompassing hemolytic anemias, malignant tumors, and cardiovascular dysfunctions. Notably, osmotic fragility exhibits variability across different animal species and closely intertwines with their respective ecosystems. A methodology for assessing osmotic fragility has been devised utilizing a laser particle analyzer, facilitating the real-time monitoring of cell concentration changes under controlled temperature conditions. The species examined include Homo sapiens, Rattus norvegicus domestica, Coturnix japonica domestica, Rana ridibunda, Carassius carassius, and Lampetra fluviatilis. The methodology is presented in two variants: (1) manual water additions and (2) automated medium dilution. Key parameters characterizing osmotic fragility include H50 (the osmolality causing lysis in half of the susceptible cells), H90 (lysis in 90% of the cells), and W (heterogeneity in lysis fragility within the cell population). The findings obtained through the developed method did not show statistically significant deviations from the results obtained using spectrophotometry and flow cytometry concerning parameters such as H50 and W. Moreover, no noteworthy disparities were observed between the outcomes of the automatic and manual methodologies. Erythrocytes of aquatic and semi-aquatic animals exhibit significantly higher resistance to hypotonic lysis. Among all species examined, amphibian (Rana ridibunda) and lamprey (Lampetra fluviatilis) erythrocytes demonstrated the lowest osmotic fragility. The most pronounced variability in resistance levels was detected among amphibians, with differences nearly doubling in comparison to other taxa examined. While mammalian erythrocytes (including those of humans and rats) exhibited similar fragility levels, they displayed less uniformity in their resistance profiles. Bird erythrocytes, on the other hand, demonstrated a half-lysis occurrence at higher osmolality levels compared to mammalian erythrocytes. Nonetheless, bird erythrocytes (Coturnix japonica domestica) lysed over a considerably wider osmotic range and contained a subset of cells resilient to hypotonic lysis. These findings indicate that erythrocytes of lower vertebrates possess lower osmotic fragility compared to those of higher vertebrates, a phenomenon likely attributable to embryonic characteristics, ecto-/endothermy, and habitat considerations.
The Role of Calcium-Dependent Desensitization in the Potentiation by GNE-9278 of NMDA Receptor Currents in Rat Cortal Neurons in vitro
Authors: Fedorina A. I. , Antonov S. M. , Sibarov D. A.
Published: December 2024

To compensate for the lack of functions of NMDA receptors in the central nervous system against the background of dementia, positive allosteric modulators (PAMs) are of great interest. Known PAMs increase the amplitude of integral ion currents carried by NMDA receptors, but do not affect the calcium-calmodulin dependent desensitization of the latter. We studied the possibility of modulating NMDA receptor desensitization by the newly synthesized PAM GNE-9278, which has a unique binding site on the transmembrane domain. Experiments were performed on native NMDA receptors expressed in rat neocortical neurons in primary tissue culture. Using the “patch-clamp” method of recording transmembrane currents, a comparative study of the effect of three substances potentiating NMDA receptor currents on the desensitization of these receptors was carried out: GNE-9278 (10 µM), dithiothreitol (1 mM) and copper ions (5 µM). These substances increased the amplitude of currents evoked by 100 μM NMDA, but only GNE-9278 reduced the difference between steady-state and peak current amplitudes by 15%. In addition, GNE-9278 doubled the decay time constant from peak to steady state, i.e., weakened the desensitization of NMDA receptors. Because GNE-9278 did not alter the effective extracellular calcium concentration to generate desensitization, its effect likely does not affect the receptor's interaction with calmodulin. Analysis of the shape of the currents within the framework of the kinetic model revealed that GNE-9278 reduces two kinetic parameters: the rate of channel closure, which determines the time of the open state, as well as the rates of entry into and exit of the receptor from the desensitized state, which determine the probability of the open state of the channel. Modulation of calcium-dependent NMDA receptor desensitization distinguishes GNE-9278 from other known PAMs, which is likely determined by the binding site of GNE-9278 in the pre-M1 domain of the GluN1 subunit.
Russian agricultural chemistry in the context of the policy of technological sovereignty of the national agro-industrial complex
Authors: Ivanova Lyudmila
Published: December 2024

In the article the features of agrochemistry as a factor of crop production efficiency are revealed, as well as some structural and institutional features of the global agrochemical production. The specifics of Russian agrochemistry are analyzed in the context of achieving technological sovereignty of the national agro-industrial complex. It is shown that technological sovereignty of Russia in the production of mineral fertilizers is beyond doubt and the main limitation to its development is dependence on foreign logistics, which is overcome by attracting investments in the development of specialized port terminals. The technological sovereignty in the production of pesticides and other agrochemical products is ensured by investments of specialized companies in the development and production of necessary active substances. The strategic reduction of import dependence in the seed segment is associated with a set of measures aimed at gradually reducing the share of imported products by developing domestic selection and industrial seed production. It is concluded that, given the tough competition in the global market for Russian agrochemicals, consolidation is necessary through the formation of conglomerates that combine financial, human, technological and information resources for the production of fertilizers, pesticides and seeds.
Picritic dolerite dikes of the Naryn River: age, composition and position in the geological history of the Southeastern Tuva (Central Asian Orogenic Belt)
Authors: Yarmolyuk V. V. , Kozlovsky A. M. , Moroz U. A. , Nikiforov A. V.
Published: December 2024

New evidence of the Early Silurian sublithospheric magmatic activity in the eastern part of the Altai-Sayan orogen has been obtained, which occurred between large-scale mantle magmatic episodes of the Middle–Late Ordovician and Devonian. These are the dikes of high-Mg (MgO 15–22 wt %) picritic dolerite of the Naryn complex in the western part of the Tuva-Mongolian superterrane. The dike complex consists of simple picritic dolerite dikes and combined dikes which compose a central picritic dolerite and granitoids along contacts with mingling zone between them. The picritic dolerite geochemical signature is similar to the enriched basalt of mid-ocean ridges or within-plate regions and indicates sublithospheric mantle source of therm. The origin of initial picritic dolerite melts occurred at depth about 120–140 km, temperature of 1600–1640°C and melting degree up to 20% of a dry peridotite. These values are consistent with the origin conditions of the hot spot magmas. The granitoids from combined dikes had crustal geochemical signature and were formed due to anatexis of the Tuva-Mongolian superterrane host rocks initiated by the picritic dolerite intrusion. The U–Pb zircon age (SHRIMP-II) of leucogranite from the combined dyke is 439±3 Ma witch interpreted as age of the Naryn dyke complex. Early Silurian mantle magmatic activity of the Southeastern Tuva most likely caused the migration of the Siberian paleocontinent over the African mantle hot field.
The phase shift between the global surface temperature and the CO2 content in the atmosphere according to simulations with an ensemble of CMIP6 models
Authors: Muryshev K. E. , Eliseev A. V. , Mokhov I. I. , Timazhev A. V. , Klimovich G. P.
Published: December 2024

The phase shifts between the global surface temperature T and the carbon dioxide content in the atmosphere q obtained in numerical experiments with models of the Earth climate system of the CMIP6 project (Coupled Models Intercomparison Project, phase 6) for the period 1850–2014 are analyzed. It was found that the sign of the phase shift between q and T depends not only on the analyzed time interval, but also on the method of processing the initial series. The initial q series (with a filtered annual cycle) leads in phase the corresponding T series for most models and time intervals. The first differences (inter-monthly increments) for the q series lag in phase the corresponding first differences for the T series by about 10 months with an adequate reproduction of the results obtained by analyzing observational data for recent decades. This means that such delay cannot be an argument against the generally accepted theory of global warming, which links the current increase in temperature with the dominant influence of anthropogenic greenhouse gas emissions into the atmosphere.
Dynamic characteristics of the stratospheric polar vortices
Authors: Zuev V. V. , Savelieva E. S.
Published: December 2024

The dynamic characteristics of the stratospheric polar vortices at levels from 100 to 1 hPa (minimum vortex area, minimum mean wind speed along the vortex edge, and minimum wind speed at which there is a dynamic barrier), obtained using the vortex delineation method with geopotential based on ERA5 reanalysis data, presented for the first time. Seasonal changes and average winter vertical profiles of the vortex area, mean wind speed along the vortex edge, and mean temperature inside the vortex for the Antarctic and Arctic polar vortices were obtained. The average daily probability of weakening of the dynamic barrier along the vortex edge in winter was determined based on data for 1979–2021 over the Arctic and Antarctic. It is shown that the lowest probability of weakening of the dynamic barrier (and possible breakdown of the polar vortex) in winter can be traced at levels from 30 to 3 hPa and reaches less than 50% in the Arctic and less than 1% in the Antarctic. At the 50 hPa level, the probability of weakening of the dynamic barrier is 53.7% in the Arctic and 1.4% in the Antarctic.
The first occurrence of sulfuric acid speleogenesis in Uzbekistan (Central Asia)
Authors: Bazarova E. P. , Kadebskaya O. I. , Tsurikhin E. A. , Kononov A. M.
Published: December 2024

A cave formed during the process of sulfuric acid speleogenesis (SAS) was explored on the territory Uzbekistan. Evidence of sulfate speleogenesis includes the characteristic morphology of the cave, the upward flow of warm groundwater of a chloride-sulfate sodium-calcium composition with the release of hydrogen sulfide, the widespread development of ascending passage, the presence of biomats in water, and characteristic secondary minerals. Based on the chemical composition of the water and the values of stable isotopes of oxygen and deuterium, it was concluded that the underground water of the cave are formed by mixing infiltration waters and buried sedimentogenic waters of marine sediments. The cave is an example of active sulfuric acid speleogenesis in Uzbekistan.
Development and mechanical characterization of eggshell bio-filler based hybrid composites
Authors: Khan Afroz , Naveen Kumar B. K. , Anand K. J. , Ashoka E. , Hareesha G.
Published: December 2024

Hybridization of natural fiber composite by incorporating waste- derived fillers has been identified as a promising sustainable technique to develop environmentally friendly and economical composites with enhanced mechanical properties. This study explores the mechanical performance of hybrid bamboo-epoxy composites incorporated with bio filler derived from waste chicken eggshells. Compression molding was employed to develop unfilled and eggshell powder filled bamboo composites by varying eggshell content (2, 4, and 6 wt%) while maintaining constant bamboo fiber wt%. Composites were tested for mechanical properties by performing tensile test, flexural test, and impact test per ASTM standards. Results indicated that eggshell filler inclusion significantly modifies the tensile, flexural, and impact strength properties of base bamboo composite. Adding eggshell filler enhanced tensile and flexural properties which was attributed to improved interfacial bonding and efficient stress transfer. Optimal filler was achieved for composites with 4 wt % eggshell exhibiting 13.5% improvement in tensile strength and 16.4% improvement in flexural strength. While reduction in impact strength observed was attributed to incorporation of inorganic eggshell filler which mainly consists of CaCo3 content. The fractography studies revealed the improved fiber-matrix interaction with the inclusion of filler, reduced fiber pullouts, and failure by fiber breakage supporting the observed experimental results.
Reinforcing Effect of Rings for Open-Top Tanks
Authors: Mushchanov Vladimir , Tsepliaev Maksim , Zubenko Anna
Published: December 2024

The current study addresses the high risk of buckling in open-top tanks. The only method of reinforcing the walls is to arrange the stiffened rings. However, existing regulatory documents offer methods for the arrangement of rings without taking into account the peculiarities of the operation of tanks without a stationary roof and the uneven wind pressure. Using the SolidWorks software, an updated wind load diagram was obtained, which showed differences between it and the normative up to 40% zone of the upper belt. Further, in the LIRA-SAPR, by sequentially enumerating the options, dependencies are determined that allow placing stiffened rings. The expression is determined for tanks with a volume of 10–30 thousand m3, through the λ parameter, taking into account the geometry of the tank and the specified shape of the wind pressure. As a result of the recommendations, the stability of the wall increases in the range of 6–14% compared to the normative placement of the corresponding number of rings.
Research on Maintenance Robot of Main Structure of Building Construction
Authors: Zhai Haobo , Ren Baoshuang , Chen Ke
Published: December 2024

With the rapid development of robot and automation technology, the main structure maintenance robot of building has become an effective solution to improve the maintenance efficiency and quality of the main structure of housing construction. This paper aims to discuss and study the application of the main structure maintenance robot of building construction, and introduces the maintenance robot of the main structure of building construction through the challenges of building main structure maintenance, the advantages of robot maintenance, application cases, robot hardware design and control, and construction effect evaluation, and explains the necessity of maintenance robot for the maintenance of the main structure of building construction. Through maintenance cases, relevant improvement measures are proposed for the design and control of robots, so as to provide reference and guidance for the design of maintenance robots; Digitally empower curing processes with a maintenance approach. In addition, this paper discusses the potential direction and wide application prospect of the future development of the main structure maintenance robot of building construction.
Study on Wax Injection Techniques for Steel Tendons of Monitoring Prestress States in the Third-Generation of Nuclear Power Plants
Authors: Wang Yaning , Tian Xiaoyi , Fu Kaiming , Liu Kang , Liu Jun , Hu Lixin , Qin Huilai , Fang Tao
Published: December 2024

In the prestressing system of nuclear island containment structures, steel tendons with stress measurement devices are installed to monitor the prestress loss during the construction and operational phases of nuclear power plants. As the effective corrosion protection for monitoring tendons is vital, wax injection techniques for monitoring tendons were explored in this study. By analyzing the critical aspects and challenges therein, selecting anti-corrosion materials and injection devices, and conducting verification tests and on-site construction, the construction processes of wax injection were determined and the effectiveness of domestic equipment was verified. During the wax melting process, stirring can significantly shorten the time it takes for the wax to fully melt. During wax injection, the wax temperature should not be lower than 65°C and should not exceed 130°C. To achieve good injection effect, the injection time should not exceed 30 minutes, with 10 minutes being optimal. Several conclusive findings were proposed and might be useful for engineering practice.
Safety Analysis of Large Radius Curved Thick Stone Curtain Wall of Exterior Wall
Authors: He Zelin , Chen Cong , Zhou Zewu , Wan Chao , Su Wenlun
Published: December 2024

With the development of the construction industry, curved and curved shapes are more and more favored by designers, so they are widely used in large public buildings such as hospitals and shopping malls. Combined with Jingzhou City central hospital engineering example, this paper points out that the safety reliability is the main consideration of stone curtain wall design, construction, the selection of stone principles and selection of dry pendant, the large radius arc dry hanging stone assumption T component, combined with the stress horizontal bending fatigue test results, from the anchor force deformation, anchor root force extension angle, curtain wall after arc stone unit force matrix using the equivalent strength factor analysis, demonstrate the arc thick stone curtain wall safety, hope to building similar arc building curtain wall construction has certain reference role.
Experimental Study on Mechanical Properties of Foundation Soil Under Unloading Condition
Authors: Zheng Wulue , Yuan Wenjun , Zhang Fuchun , Fan Ming , Zhang Xin
Published: December 2024

The stability of transmission line tower foundation soil is crucial for the proper functioning of high-voltage transmission lines. To better understand the mechanisms behind soil deformation and instability, soil samples were collected from a transmission line tower foundation in Guangzhou. Tests were conducted under different stress paths to examine the effects of loading and unloading on the mechanical properties of the soil. A constitutive model was developed to account for unloading effects. The results showed that the stress-strain relationship of the foundation soil exhibited normalized characteristics under loading conditions, with peak deviator stress increasing with confining pressure. Soil failure was predominantly characterized by bulging with minor surface cracks. When taking unloading effects into account, the soil initially underwent strain softening followed by strain hardening. The peak deviator stress at failure was lower than under loading, resulting in more severe soil failure. The study highlights the importance of considering the effects of excavation and unloading on foundation soil when constructing tower foundations, and implementing support measures in advance for stress compensation.
Research on Long-Distance Pipe Jacking Construction Technology for Large Pipe Diameter Under Complex Conditions
Authors: Niu Ben , Jia Jianwei , Liu Chengzhe , Zheng Jiushuo , Ye Youlin , Liu Xiaolong , Guo Xiaoyang
Published: December 2024

With the acceleration of urbanization and the improvement of people’s demand for high quality life, pipe jacking project shows the development trend of longer and longer single jacking distance and larger and larger pipe diameter. This development trend requires pipe jacking construction technology to be able to adapt to complex geological conditions, including adaptability to different geological conditions, diversification of pipe jacking machines, and research and development of grouting materials. This paper addresses the implementation of pipe-jacking construction techniques for large pipe diameters and long distances in complex environments. It discusses in detail the selection and performance criteria of materials required in pipe jacking construction, including the characteristics of different materials and their performance in construction. The corresponding solutions and methods are proposed by analyzing the grouting and friction reduction control, intermediate relay technology, and jacking attitude correction control and management technology encountered in long-distance pipe jacking construction. By analyzing specific cases and different solutions for different problem factors, the challenges in the construction process are effectively solved, thus improving the construction efficiency and project quality. This research is significant in coping with the complexity of long-distance, large-diameter pipe jacking construction.
Construction Technology and Quality Control of Post-Cast Composite Slab and Strip
Authors: Zhong Zhihua , Tang Huaping , Li Bing , Xu Hongjian
Published: December 2024

As the main component of a building, the floor slab is not only a load-bearing element, but also an enclosure structure, and plays an important role in the structural system. The floor slabs in prefabricated building systems should not only meet safety and enclosure requirements, but also facilitate construction and meet the requirements of standardization, batch production, and systematic production, in order to achieve true assembly. Although the prefabricated composite floor building system has developed rapidly, there are still many pain points and difficulties in the construction process, and the construction quality is uncontrollable. For example, there have been many problems with the forming quality of the post cast slab strip of the composite slab. This article is based on the Shimao Ten Mile Star River project, and conducts a special research and discussion on the analysis and control of the current quality status of precast composite panels and post cast strip forming. It provides a solution to the key and difficult points of post cast strip construction process control, in order to provide reference for similar projects.
Experimental Study on Mechanical Performance of Full Precast Cavity Concrete Floor
Authors: Gao Jie , Liu Ziyang , Zheng Zhiyuan
Published: December 2024

In order to study the influence of the mechanical performance of a unidirectional through precast concrete floor, a group of 3 unidirectional through precast slab specimens were designed to compare the bending performance with that of cast-in-place floor slabs. By investigating the characteristics of the slab failure form, mid-span deflection change, stress change of the reinforcement in the slab, and strain change of the concrete at the bottom of the slab, the following conclusions were drawn: No obvious brittle failure was observed during the test, and the bending resistance of each test plate was good. The crack development of the test board shows that the mechanical performance of the precast wood fiber concrete floor is similar to that of cast-in-place solid floor, and the crack distribution is more uniform. The ultimate bearing capacity of all cavity plates is higher than that of 100 mm thick core plate, and the ultimate bearing capacity of 100 mm thick core plate is increased by about 46.1%.
Research on Construction Technology of Comprehensive Support and Hanger for Finished Mechanical and Electrical Pipelines Based on BIM
Authors: Peng Zhengfei , Feng Zili , Zuo Anwen , He Zhihui , Liu Can
Published: December 2024

With the development of the construction industry, modern buildings have gradually put forward higher requirements in terms of safety, beauty, ease of operation and maintenance, and renovation and upgrading. The construction of comprehensive supports and hangers is simple, and is generally completed before pipeline construction. It can avoid the complicated process of installing supports and hangers during the construction process. The pipeline layout is clear and concise, which not only effectively utilizes space and improves work efficiency, but also has advantages in reducing steel consumption and reducing construction costs. With the development of technology, supports and hangers have evolved from the original single variety to the current diversification, from the original single constant force supports and hangers to the later elastic supports and hangers and restrictive supports and hangers. Comprehensive support and hanger technology is to coordinate the planning of pipelines, bridge supports and hangers for building water supply and drainage, ventilation and air-conditioning, fire protection, and electrical specialties and integrate several specialties into one system, so as to meet the needs of various specialties for supports and hangers under the premise of ensuring the construction requirements of each specialty, and realize the reasonable allocation of installation space and resource sharing.
Study on Fire Resistance of Two-Span Continuous Steel-Concrete Prestressed Composite Beams
Authors: Zheng Zhiyuan , Zhao Yongqiang , Gao Jie , Chen Huanxin
Published: December 2024

In order to study the fire resistance of prestressed continuous composite beams and master the finite element simulation method, a set of two-span steel-mixed continuous prestressed composite beams were designed and tested, and the finite element model of material and geometric nonlinear forces was established by ABAQUS finite element software. By investigating the characteristics of the composite beam under high temperature, such as failure form, deflection change, reaction change at the support, curvature change of key section and internal force change of cable, comparing the test and finite element simulation results, the results show that: Under the standard heating mode, the temperature distribution of each component of the composite beam is different, and the temperature rise rate of the lower flange of the steel beam is the fastest, followed by the web, the upper flange of the steel beam, and the concrete slab. The failure form of the composite beam at high temperature shows that the mid-span deflection is too large, and the web plate and flange of the middle support are distorted. The mid-span deflection decreases gradually with increasing temperature, and the rate starts to accelerate when the temperature is about 450 degrees. The relative tension of the cable decreases first and then increases slowly with the increase of temperature. The relative reaction of the support decreases first and then increases with the increase of temperature. The nonlinear finite element simulation model of two-span prestressed continuous steel-concrete composite beams is obtained after comparison and verification, which provides technical support for further engineering.
Research on Construction Technology of Continuous Wall in Deep Foundation Pit of Large Public Buildings
Authors: Cao Jiawei , Xing Yan , Wang Xin
Published: December 2024

As a common form of deep foundation pit support, the construction of diaphragm wall is often affected by the engineering geological situation, hydrogeological conditions and other factors. In this regard, this study takes the deep foundation pit project of Guangzhou Science and Technology Library as an example, firstly, on the basis of sorting out the design method, construction technology and related construction process of diaphragm wall, it analyzes the difficulties in the construction process and puts forward corresponding technical measures; secondly, it carries out the research on the main points of the construction technology and the construction technology method and applies them to the construction of diaphragm wall, which achieves good results. This study can effectively reduce the construction difficulty of deep foundation pit diaphragm wall, and has a positive effect on the cost reduction and efficiency of deep foundation pit diaphragm wall construction.
Mechanical Properties of Spatial Intersecting Nodes with Steel Fiber-Reinforced Recycled Concrete in Oblique Grids
Authors: Wang Jinge , Wang Feicheng , Meng Ziwei , Wei Daoquan
Published: December 2024

To investigate the mechanical properties of oblique grid spatial intersecting nodes filled with steel fiber-reinforced recycled concrete (OGSIN-SFRRC), a three-dimensional solid model was developed using ABAQUS. This study examines the effects of six parameters on the mechanical behavior of the intersecting nodes under axial compression: spatial intersecting angle, planar intersecting angle, symmetry coefficient, steel ratio in the cross-section, recycled aggregate replacement rate, and steel fiber content. The results reveal that the wall thickness of the steel tube and the strength of the concrete should be uniform in both the joint and non-joint regions. The spatial intersecting angle, symmetry coefficient, and aggregate replacement rate significantly affect the initial stiffness and ultimate load of the components. Components with a higher steel ratio necessitate a greater vertical range of circumferential restraint. Specimens with higher aggregate replacement rates exhibit diminished load-bearing capacity, with the ultimate load and elastic stiffness decreasing by 14.10% and 10.19%, respectively, for specimens with a 100% replacement rate compared to those with a 0% replacement rate. Steel fibers substantially improve the ultimate load and energy dissipation capacity of the components. The OGSIN-SFRRC demonstrates superior axial compression and seismic performance, making it suitable for practical engineering applications. Additionally, nonlinear fitting of the existing CFST bearing capacity formula provided a revised calculation formula for joint bearing capacity that accounts for parameter variations, enabling accurate estimation of the ultimate bearing capacity of OGSIN-SFRRC.
The Bearing Capacity Calculation Method of I-Section Eccentric Compression Members Strengthened by Increasing the Cross-Section Method
Authors: Yuan Linyu , Wei Rongbin
Published: December 2024

Based on the fact that the current bridge reinforcement design specifications do not see the reinforcement of I-section eccentric compression members by increasing the cross-section method, the main calculation process of I-section eccentric compression members based on the Specifications for Strengthening Design of Highway Bridges (JTG/T J22-2008) was supplemented and improved in this paper, the calculation formula of key parameters were obtained. The coefficients A, B, C and D of the univariate cubic equation for solving the height x of the compression zone under different eccentric conditions were determined. In order to get the nominal strain ε′s2 which corresponding to the new longitudinal ordinary steel bar As2 in the first stage, the coefficients A, B, C and D of the univariate cubic equation for solving the first stage compression zone height x1 of the original I-section member under the large eccentricity were determined. This paper provides a reference for the bearing capacity calculation of the same type of members strengthened by the enlarged section method.
Analysis of Large Double-Wall Steel Cofferdam Design and the Piling Before Cofferdam Construction Methodology
Authors: Tang Yadong , Hu Laiping , Wang Binpeng
Published: December 2024

Double-wall steel cofferdam has become an ideal enclosure structure in deep-water foundation construction due to its virtue of high strength, high rigidity and good waterproof performance, and has been applied in bridge construction on a large scale. This paper takes the construction of Pier 5 bearing platform of Leishui Large-Span Bridge with water depth of 18 m as the engineering background, and introduces the design of double-wall steel cofferdam for deep-water bearing platform and the design parameters of double-wall steel cofferdam with height of 20.8 m. The paper adopts Midas/Civil to establish finite element model for the cofferdam structure, to check the strength, stiffness and stability of the cofferdam structure. The paper gives a detailed introduction to the checking of the cofferdam’s anti-floating, anti-slumping, and key weld joints, etc. In addition, for the methodology of piling before cofferdam construction, the paper introduces the design and technology of the first section assembly platform and lifting system of the cofferdam.
Application of Artificial Intelligence in Disaster Mitigation of Structures
Authors: Basavanagowda G M , Santosh Tekkannavar , Mahesh Kumar , Shwetha K G , Milad Khatib
Published: December 2024

Natural disasters have become increasingly common in recent years. This quick escalation has resulted in loss of property and life, building damage, and more people being affected. This has the potential to impact any country’s economic progress. Proper and efficient mitigation methods might help to lessen these losses. The current study attempts to study and analyze the damage levels in structures caused by disasters utilizing the Visual Geometry Group (VGG16) system and the notion of artificial intelligence. A number of damaged building photographs were gathered by visual examination, and an Artificial Intelligence (AI)-based model was developed, trained, and building images evaluated using geographical information methods to make the structure usable. Based on the damage levels, the building can be categorized as severely damaged, moderately damaged or the damage level is mild which will help us adopt the proper restoration techniques to make the building habitable. The study also intends to provide appropriate strengthening strategies to decrease the death throughout big natural disasters.
Finite Element Model Updating Method for Wind-Induced Vibration Analysis of Tall Buildings
Authors: Xiao Tianyin , Zhang Furong , Huang Bin , Mai Xiaodi
Published: December 2024

The dynamic performance of the finite element model used for structural design deviates greatly from the measured results. After updating, the dynamic performance of the structure is consistent with the measured values and can be used to calculate the wind-induced vibration response and then assess the serviceability. This paper used on-site measured data from typhoons to identify modal parameters of a high-rise building and obtained modal parameters. We established a finite element model, conducted dynamic characteristic analysis, compared it with the measured modal parameters, analyzed the influence of various factors on the dynamic performance of the model, and reasonably modified the model to make the dynamic performance of the finite element model consistent with the measured data. This paper discusses the correction factors of the finite element model and proposes correction methods and suggestions. The method has certain reference significance in estimating wind-induced vibration response in the design stage of tall buildings.
Analysis of Detachable Temporary Construction Structure Scheme
Authors: Li Chang , Ou Yazhou , Gao Shuqing , Wang Jingye , Yan Dongqiang , Wang Shaojian
Published: December 2024

In view of the current problems of high installation costs and serious waste of resources in the field of infrastructure, a modular pin-connected detachable and reusable structure was proposed. This structural type splits the beam into 3m-long modules, and the modules were connected by pins. The end modules of the beams and the steel plates welded to the steel columns were also connected by pins, achieving standardized design, lightweight construction, and high-efficiency turnover. This article takes the steel processing shed of a high-speed rail project as an example, focusing on structural analysis and economic cost analysis of three solutions: modular pin connection structure (MPCS), embedded node connection structure (MNCS) and bolted steel structure (BSS). The analysis results showed that when the overall structural calculation indicators of the three structural forms are equivalent, the MPCS system has faster construction speed, lower cost, better turnover, and is suitable for large-scale promotion.
Mechanical Analysis and Application Research of Steel Structure Glass Skylight Ceiling Hoisting
Authors: Jun Song , Peng Zhengfei , Feng Zili , Zuo Anwen , Yang Ke
Published: December 2024

With the development of large-scale, diversified and diversified buildings, fully decorated facades and full curtain wall designs are becoming more and more common. In order to ensure practical functions, commercial buildings often design atriums with natural light roofs on the roof. This type of design can introduce natural light into the shopping center, extend the atrium space of the shopping center outward, interact with the outdoor space, and create a good spatial experience. Natural light roofs are mostly steel structure glass roofs that take into account both structural safety and lighting requirements. Because the atrium is located in the middle of the building, the installation of steel structures has difficulties such as large spans, long component sizes, heavy weights, and high assembly precision requirements. This article solves the problems of large spans, long component sizes, heavy weights, and high assembly precision requirements for steel structures through simulation calculations, the use of truck cranes, and spider car hoisting construction.
Development and Principle of a Parameterized Design Platform for Building Facade System Based on Grasshopper
Authors: Li Keyan , Zhong Guanghu , Liu Zhengtao
Published: December 2024

Parametric design based on Grasshopper (GH) is one of the current trends in the field of architectural design, especially in the domain of façade systems. However, with the continuous practice of parametric design, the issue of “data islands” in programming has gradually surfaced, becoming a significant constraint on its development. This paper begins by exploring the design logic of building facade systems, dividing the design process into stages, specifying algorithmic intervals, and establishing the fundamental framework for data. Subsequently, unified data interface standards are defined between algorithmic intervals, achieving the standardization of the parametric design process and data. Finally, by collecting and integrating algorithms at each stage, a Grasshopper application platform dedicated to building facade system design is constructed. The platform’s plugins are designed for repeated use, addressing the programming challenges associated with “data islands.” Simultaneously, the architecture and data standards of the new platform take into full consideration the control requirements in building facade system design, rendering it more practically significant.
Spatio-Temporal Analysis and Quantification of Urban Growth Dynamics Using Spatial Metrics and Relative Entropy
Authors: Singh Anjali , Tripathi Akshar , Joshi Rishabh
Published: December 2024

This study emphasizes the utility of Remote Sensing and GIS in combination with Relative Entropy and Spatial Metrics in quantifying the composition and configuration of the urban growth of the study area. The inherent structural development patterns of a metropolitan area is significant for properly managing any human habitat development. Haphazard urban growth without proper planning or understanding of the dynamics associated with urbanization might lead to sustenance issues for all the species on earth and negative urban footprints on the environment. In the proposed study, the urban growth maps of the Roorkee planning area were prepared using Remote Sensing & GIS. These maps are analysed using nine spatial indices to define the statistics of urban growth dynamics. The information was validated using the Relative Entropy index to give complete information on different aspects of the landscape, providing an insight into the development and initiation of sprawling process and dynamics of change. The study results are utilised to establish the forms, patterns and types of urban development, which is quantitatively evaluated using these indices. It is observed that there is clustered continuous growth in and along the city center and across the different patches of the whole landscape. The built-up, however, is evenly and equitably distributed along the road corridors. But the urban growth shrinks, as we move away from the road. Hence, a ribbon-sprawl development with linear aggregated growth is observed in the study area. This initiation of sprawling might cause environmental impacts. Hence, this analysis and information is beneficial to formulate strategies on urban development to guide sustainable development plans for the future.
Predicting Carbonation Depth in Existing Structures: ANFIS Analysis Incorporating Key Parameters
Authors: Kumavat Hemraj R
Published: December 2024

Influence of carbonation with increased design loads, structural assessment of existing buildings has become more essential in recent years. Despite the fact that numerous variables impact the durability of concrete buildings, past research has focused on just one. Furthermore, the bulk of these studies were done only in the laboratory, with no evidence of data being obtained through field assessment. As a result, using non-destructive approaches (Rebound index) to get valuable insights on the carbonation impact would be quite beneficial. Application of an Adaptive Neurofuzzy Inference System (ANFIS) for predicting the carbonation depth of data acquired from field investigations of different concrete carbonated structures ranging in age from 2 to 40 years in Maharashtra’s high humidity region (Pune). However a number of factors influence the carbonation depth, it is hard to account for all of them in this research. As a result, the ANFIS algorithm’s input parameters were the age, height and diameter ratio of core specimen, cube equivalent strength (Fcm), and rebound index (RI) of concrete buildings. The carbonation depth of these carbonated structures was assessed using the Sugeno fuzzy inference system, as well as the results revealed that the suggested model accurately captured the attribution of these input parameters. Bell shape fuzzy sets are used in this work, which provide higher accuracy with ANFIS training. ANFIS model is intended to be used for estimating the strength of carbonated structures that are investigated on a frequent basis.