bluuebunny/crossref_metadata_2025 huggingface dataset:
PERANCANGAN ASPAL PANAS JMF ACWC DENGAN MEMANFAATKAN ASPAL DAUR ULANG
Authors: Kusnadi Kusnadi , Alhuda Azis
Published: May 2023

Aspal merupakan bahan pokok dalam pekerjaan jalan di Indonesia, perkerasan jalan di indonesia memeliki banyak masalah berkaitan kualitas jalan itu Kebanyakan jalan yang  rusak  adalah jalan yang termasuk  jalan  kabupaten  /kota  yang  lebih  besar jumlahnya dari jalan propinsi dan jalan nasional . Pada perkerasan jalan lentur masalah  umum  yang terjadi  meliputi cracking  (retak) raveling ( pelepasan butir ) dan rutting ( alur ) yang ketiganya  memiliki  indicator  tingkat  kerusakan  masing  masing , Umumnya  untuk perbaikan  perkerasan  jalan  lentur  digunakan  campuran aspal panas dengan mempertimbangkan  kepada  tingkat  kerusakan .yang  terjadi  di sepanjang ruas  jalan tersebut. Karena aspal panas memiliki kelebihan pada fleksibilitas campuran, tahan cuaca dan kemampuan untuk mengalirkan air pada saat hujan, mampu menopang beban kendaraan yang lewat serta tahan terhadap lingkungan dan cuaca. Dinas Bina Marga Dan Dinas Bina Kuntruksi Kabupaten Pasuruan berkomitment untuk selalu memperhatikan kondisi jalan dengan melakukan percobaan campuran aspal panas  matrial daur ulang  ( RAP ), Dengan luasan wilayah  yang begitu besar Kabupaten Pasuruan juga masuk dalam kawasan hutan lindung Bromo, Tengger,Semeru (BTS) kawasan penunjang pariwisata nasional (KSPN ).dalam hal ini dinas bina marga bersama kontraktor,konsultan mengadakan percobaan campuran aspal panasDengan pemanfaatan aspal daur ulang ( RAP ) yang dilakukan di AMP PT Margahayu Trans Mix bersama  Dinas Bina Marga dan Bina Tehnik ,Kontraktor , Konsultan Supervisi.
Analisis Faktor-Faktor yang Mempengaruhi Kualitas Pekerjaan pada Proyek Konstruksi
Authors: Wijayanthi Shanty , Huda Aziz Al
Published: May 2023

Penelitian ini bertujuan  mengidentifikasi faktor-faktor yang mempengaruhi kualitas pekerjaan pada proyek konstruksi. Faktor koordinasi antar instansi, kondisi cuaca ekstrim, lambatnya penanganan material, pengetahuan operasi perusahaan, dan penggunaan peralatan kini menjadi variabel-variabel yang mempengaruhi potensi aplikasi kerja. Ketika karyawan bekerja dengan baik, perusahaan mendapatkan hasil yang meningkat. Kinerja karyawan tidak akan optimal jika hanya mengandalkan elemen perangkat seperti mesin dan alat pengembangan tanpa memperhitungkan faktor manusia. Karyawan di industri konstruksi adalah bagian terpenting dari bisnis. Tinjauan ini menggunakan pendekatan tinjauan sistematis dan kemudian diproses melalui hasil yang disukai sistem tinjauan sistematis secara total. Beberapa variabel yang mempengaruhi proyek adalah sebagai berikut, termasuk kenyataan bahwa proyek memang dapat diselesaikan tepat waktu.
Analisa Kinerja Sistem Drainase Terhadap Penanggulangan Banjir dan Genangan
Authors: Sari Endang Kartika , Mokhtar Ali
Published: May 2023

Tujuan dari penelitian ini adalah untuk menilai kinerja sistem drainase dalam hal pencegahan dan pengendalian banjir. Banjir di pemukiman penduduk saat musim hujan merupakan masalah yang sering terjadi pada masyarakat yang tinggal di perkotaan. Alih fungsi lahan yang sebelumnya hijau atau pertanian menjadi perkotaan, serta kawasan pemukiman, industri, atau komersial dan perkantoran, menjadi salah satu penyebab banjir ini. Hal ini terjadi tidak hanya di perkotaan, tetapi juga di pedesaan dan kawasan lindung yang berfungsi sebagai badan air. Masalah lainnya adalah penyempitan kemacetan yang menyebabkan air meluap. Selain itu, manajemen operasi dan pemeliharaan yang buruk dapat mengakibatkan berkurangnya kapasitas saluran karena sedimen tidak segera dikeruk.
Tinjauan Literatur Terkait Risiko Proyek Pada Konstruksi Bangunan
Authors: Sulaiman Meri Oktavia , Setiyono Agus
Published: May 2023

Tujuan dari penelitian ini adalah untuk mempelajari literatur tentang proyek konstruksi dalam desain infrastruktur. Di sektor konstruksi, harus memenuhi persyaratan pelanggan adalah salah satu tujuan utama dari keseluruhan proyek karena merupakan salah satu indikator keberhasilan yang penting. Semua biaya proyek diarahkan untuk mencapai pencapaian kinerja. Ini terinspirasi oleh gagasan bahwa kemajuan kinerja merupakan faktor penting dalam perkembangan dan kesuksesan organisasi. Tinjauan pustaka ini menggunakan metode kuantitatif, yang meliputi penilaian karya sastra menggunakan metode kuantitatif untuk mengidentifikasi urutan penelitian jurnal yang diterbitkan. Setelah itu, dengan menggunakan pendekatan kualitatif, mereka melakukan tinjauan sistematis. Menurut hasil penelitian tinjauan literatur, hampir semua makalah menggambarkan risiko yang teridentifikasi dalam desain infrastruktur, yang terdiri dari tiga: risiko internal, faktor eksternal, dan risiko proyek. Desain baru selama proyek pembangunan merupakan rintangan yang paling sulit untuk menghasilkan hasil yang lebih tinggi dalam hal faktor perencanaan. Strategi pengadaan tenaga kerja konstruksi yang buruk akan menghasilkan proyek konstruksi yang buruk, peningkatan biaya yang melebihi anggaran yang ada, penundaan/penambahan durasi, peningkatan efisiensi operasional yang mulai turun di bawah standar yang dibutuhkan, masalah personel yang umum, dan ditetapkan sebagai rangkaian.
Penerapan Sistem K3 Konstruksi Pekerjaan Erection Steel Box Girder Pada Proyek Jakarta-Cikampek Elevated II
Authors: Widodo Sapto Priyo , Fariadi Didik Budi
Published: May 2023

Kesehatan, keselamatan kerja merupakan yang sangat penting dalam bekerja, Hal tersebut sesuai dengan regulasi perundangan – undangan yang berlaku. Penerapan Sistem Manajemen Keselamatan Kerja dalam pekerjaan Erection Girder yang berada pada kondisi bangunan di ketinggian dengan tingkat resiko yang sangat tinggi, bahaya tingkat tinggi juga dengan lalu lintas diakses jalan tetap berjalan seperti biasa. Berdasarkan Peraturan Pemerintah (PP) Nomor 50 Tahun 2012 tentang tingkat potensi bahaya tinggi, perusahaan  yang  memiliki  potensi  bahaya  dapat  mengakibatkan  kecelakaan  yang  merugikan  jiwa manusia, terganggunya proses produksi, dan pencemaran lingkungan kerja. Dari penerapan sistem manajemen keselamatan dan kesehatan kerja yang dilakukan untuk pekerjaan Erection Steel Box Girder pada proyek Jakarta – Cikampek Elevated II. Tinjauan rencana kerja, Metode Pelaksanaan dan Aplikasi Penerapan Pelaksanaan dilapangan baik secara kualitatif dan kuantitatif diberbagai Erection Girder baik Span Standart (Steel Box Girder)  maupun Longspan (Steel I Girder). Dari hasil Pengamatan dan Penelitian disimpulkan Penerapan yang disesuaikan dengan regulasi Peraturan Pemerintah Nomor 50 Tahun 2012 dengan Variabel Penelitian terhadap Komitmen dan Kebijakan Perusahaan,,Rencana Pelaksanan K3 dan Monitoring dan Evaluasi serta Tindaklanjut dalam penerapan dilapangan terhadap pekerjaan Erection Steel Box Girder maupun Steel I Girder. Tinjauan Metode Erection Girder dengan Metode Tandem Crane Clawler maupun Launcher gatry pada Steel Box Girder maupun Steel I girder untuk Span standart dan Longspan.
Model Beer-Lambert untuk Perbaikan Warna Objek Bawah Laut Berbasis Estimasi Absorpsi Cahaya
Authors: Pujiono Pujiono , Amal Andi Syaiful
Published: May 2023

Ketika objek bawah laut diambil citranya maka kualitas warna citra yang dihasilkan tidak seperti dipermukaan laut atau di udara. Kualitas warna objek bawah laut sangat rendah karena terjadi distorsi warna. Penyebab utama distorsi warna objek bawah laut adalah perubahan warna dan hamburan cahaya. Perubahan warna objek bawah laut juga s angat tergantung pada intensitas citra bawag laut serta Panjang gelombang masing-masing warna objek bawah laut. Dalam artikel ini dilakukan pendekatan beer-lambert model untuk memperbaiki kualitas warna objek bawah laut berbasis pada estimasi absorpsi cahaya. Pendekatan model beer-lambert ini dengan melakukan hubungan intensitas warna objek di permukaan dengan intensitas warna objek dikedalaman tertentu di bawah laut, dengan koefisien tertentu. Penentuan koefisien dalam pendekatan beer-lambert menggunakan least square. Pengukuran kualitas warna objek bawah laut menggunakan Peak Signal Noise to Rasio (PSNR), dimana dalam pendekatan non linier warna objek bawah laut menghasilkan nilai PSNR sebesar 19.49. Secara visual hasil dari pendekatan model beer-lambert berbasis estimasi absorsi cahaya ini kualitas objek bawah laut sampai pada kedalaman tujuh meter di bawah permukaan laut memiliki kualitas warna seperti warna objek di permukaan laut
Pengaruh Penerapan SMK3 Pada Proyek Konstruksi Terhadap Kualitas Pekerjaan (Studi Kasus: Proyek Rehabilitasi Gedung Kantor Kejaksaan Kota Madiun
Authors: Prabowo Oki Pribadi Wimbo , Abduh Moh.
Published: May 2023

Bagi sektor jasa konstruksi masalah management k3 dan safety plan adalah hal yang memiliki tingkat kecelakaan kerja yang beresiko tinggi. Banyaknya kecelakaan kerja di Indonesia menunjukkan rendahnya pengaturan dan teroganisirnya SMK3. Penerapan SMK3 mampu menjadi acuan yang mengatur berbagai kegiatan didalam pekerjaan konstruksi, upaya pengendalian resiko dapat dikelola dalam suatu sistem manajemen yang utuh secara sistematis dan komprehensif. Penilaian Penerapan SMK3 pada Proyek konstruksi rehabilitasi Gedung Kantor Kejaksaan Kota Madiun bertujuan untuk mengetahui seberapa besar pengaruh penerapan SMK3 terhadap kualitas pekerjaan. Pada penelitian ini mengadakan survey langsung di lapangan untuk mengidentifikasi bagaimana penerapan SMK3 pada proyek konstruksi rehabilitasi gedung kantor kejaksaan Kota Madiun terhadap kualitas pekerjaan. Berdasarkan hasil penelitian diketahui bahwa Penerapan SMK3 pada proyek konstruksi berpengaruh terhadap kualitas pekerjaan proyek.
Perencanaan Pra Design Pelebaran Jalan Jemplang
Authors: Febtianto Eko , Hakim Ermanu Azizul
Published: May 2023

Daya  tarik wilayah Kabupaten Malang bagian selatan merupakan aset pariwisata yang perlu dikembangkan untuk mendorong pertumbuhan ekonomi kawasan dan Kabupaten Malang. Kecamatan Tumpang merupakan pintu gerbang utama untuk mengakses kawasan wisata TNBTS (Taman Nasional Bromo Tengger Semeru). Rute jalur utama ini melalui Tumpang, Gubugklakah, dan Ngadas. Guna menunjang kawasan wisata TNBTS, jalur ini perlu ditingkatkan kapasitasnya. Dan beberapa titik intersection perlu diperbaiki agar mampu menampung volume kendaraan yang lebih besar. Dengan adanya Perencanaan Pra Design Pelebaran Jalan Jemplang ini untuk mendapatkan aksebilitas jalan yang lebih memadai sehingga dapat tersedianya dokumen Perencanaan Pra Design Pelebaran Jalan Jemplang dilengkapi dengan perbaikan Intersection dan memperbaiki geometri jalan Gubugklakah – Jarak Ijo – Jemplang. Pada penelitian ini akan dianalisis dengan metode Cynamic Cone Penetrometer (DCP) merupakan suatu motode untuk mengukur daya dukung tanah dasar jalan langsung di tempat Perencanaan Pra Design Pelebaran Jalan Jemplang. Metode Analisa lainnya yaitu Analisa Lalu Lintas dan Perhitungan Tinggi Hujan Rencana Kurva Gumbel.
Pengaruh Meterisasi Pada Penggunan Lampu Penerangan Jalan Umum (LPJU) Di Kabupaten Lamongan
Authors: Sabudi Teguh Ali , Amal Andi Syaiful
Published: May 2023

Lamongan merupakan salah satu Kabupaten yang berada di Propinsi Jawa timur, dengan luas wilayah 1.812.8 km2 atau kurang lebih 3.78 % luas wilayag propinsi Jawa Timur. Kabupaten Lamongan memiliki 27 Kecamatan dan 476 desa. Kabupaten Lamongan memiliki 6.700 titik lampu terpasang, beberapa jenis lampu yang terpasang antaralain  lampu merkuri 250 Watt, lampu SON-T 250 Watt, lampu SON-T 150 watt, lampu SON-T 70 watt, lampu SON-E 150 watt, Lampu SON-E 70 watt, lampu LED 120 watt lampu LED 90 Watt Lampu LED 40 Watt . Beradasarkan hal tersebut lampu yang berdaya besar  berupa lampu shodium konvensional  masih terpasang dan mengakibatkan peningkatan daya listrik dan biaya tagihan pada LPJU Kabupaten Lamongan. Oleh sebab itu diperlukan kajian untuk menagani penghematan penggunaan listrik LPJU DI  Kabupaten Lamongan. Beberapa  cara untuk mengurangi beban tagihan rekening LPJU adalah dengan cara penggantian secara bertahap terhadan type lampu dari Lampu shodium menjadi jenis lampu LED dan meterisasi LPJU di Kabupaten Lamongan yang masih belum menggunakan Meter PLN  di masing-masing panel LPJU. Cara pengamatan yang dapat dilakukan adalah dengan cara literasi pada pembayaran rekening PLN setiap bulan.
Kajian Teknis Penanganan Rehabilitasi Mayor Pada Ruas Jalan Legundi – Bunder, Sta. 14+200 – Sta. 14+600
Authors: Suprayitna Suprayitna , Indradjaja Mas
Published: May 2023

Pada proyek Preservasi Jalan Waru – Sidoarjo – Krian dan Legundi – Bunder, tepatnya di Desa Boboh, Kecamatan Menganti, Kabupaten Gresik, pada Sta. 14+200 – 14+600 Ruas Jalan Legundi – Bunder, ada perubahan  penanganan dari Rehabilitasi Mayor menjadi penanganan Rekonstrusksi Jalan dikarenakan dilokasi tersebut sering terjadi banjir sehingga perlu dilakukan peninggian elevasi jalan (Raissing) dan perlu dilakukan penggantian/pelebaran  gorong gorong sehingga air dari saluran samping tidak meluap dibadan jalan. Keuntungan dari perubahan penanganan tersebut adalah jalan menjadi awet karena bebas dari genangan air dan keuntungan lainnya adalah lancarnya lalu lintas dalam melayani pengguna jalan.Kajian Teknis ini dibuat berisi alasan perubahan, perhitungan kembali struktur perkerasan jalan serta perubahan biaya yang diakibatkan.
Perancangan Pedestrian Jalan Ramah Disabilitas Di Jalan Basuki Rahmat Kota Kediri
Authors: Wibowo Feri Mahbub , Fariadi Didik Budi
Published: May 2023

Pedestrian Jalan bisa disebut trotoar adalah jalur untuk pejalan kaki yang merupakan aspek yang sangat penting dalam sebuah penataan suatu kota. Penataan kota berkelanjutan perlu membuat rancangan fasilitas – fasilitas pelayanan publik yang memadai yang dapat diakses oleh banyak orang, termasuk penyandang disabilitas. Pedestrian Jalan / Trotar dalam perencangannya harus memperhatikan aspek keamanan, kenyamanan, dan aspek lingkungan sehingga dapat membantu semua pengguna trotoar untuk melakukan transoprtasi lokal. Berdasarkan amanat Undang-undang Republik Indonesia No. 8 Tahun 2016 tentang Penyandang Disabilitas pada ps 5 berbunyi penyandang disabilitas memiliki hak yang sama dengan orang normal yaitu hak hidup, Pendidikan, politik, pekerjaan, kesejahteraan, aksesibilitas, pelayanan public dan lainnya. Maka Pemerintah harus dapat memenuhi kebutuhan masyarakat secara adil tanpa kecuali dan sangat penting perancangan trotoar yang aksesibel untuk kebutuhan transportasi dalam kehidupan sehari-hari khususnya bagi penyandang disabilitas.Perancangan Pedestrian Jalan / Trotar yang dapat diakses oleh kaum difabel harus memenuhi prinsip inclusive design. Inclusive design adalah desain sebuah hasil pekerjaan yang dapat dimanfaatkan atau digunakan oleh orang dengan keterbatasan fisik, usia lanjut, dan jenis kelamin. Jalan Basuki Rahmat Kota Kediri merupakan Jalan Kolektor yang menghubungakan antara Jalan Nasional dengan Jalan Kota, selain itu juga sebagai konektivitas antar pusat perbelanjaan di Kota Kediri yaitu Hypermart Matahari Mall dengan Pertokoan Jalan Dhoho. Sehingga Pedestrian Jalan / trotoar di Jalan Basuki Rahmat harus dapat memenuhi aspek – aspek yang disebutkan dalam Undang – undang. Perancangan Pedestrian Jalan Basuki Rahmat diharapkan dapat menjadikan jawaban atas amanah undang - undang tersebut sehingga dapat segera direalikasikan untuk fasilitas umum di Kota Kediri yang berkeadilan.
Using the case of the Krasnodar Territory to establish centers for research and education focused on environmental protection
Authors: Kosta Anton A. , Semina Anastasia A.
Published: May 2023

Introduction. The subject of the research is peculiarities of functional-technological and volumetric-spatial organization of scientific and educational complexes of ecological orientation. Relevance of this topic is determined by the lack of institutions of additional education and the unsatisfactory state of the environmental situation in the Krasnodar Territory. The purpose of the study was to reveal the principles of designing scientific and educational complexes of ecological orientation. For the first time, scientific and educational complexes of ecological orientation are considered as a new type of public building in the system of additional education, the technological component and their functional content are revealed. Recommendations for the creation of a new type of public building have been identified. During the experimental design, a conceptual model of the proposed type of building in the conditions of the first climatic zone was worked out.

Materials and methods. The research methodology is based on the analysis of volumetric-planning organization of the structure of scientific and educational centers of ecological orientation, the study of text and graphic materials in domestic and foreign publications, electronic resources on the design of scientific and educational institutions, including in English. The generalization of the materials was carried out on the basis of methods of biosimilar design, carrying out field surveys with photovisual analysis. The informational and empirical basis of the study is the regulatory and legislative acts in force on the territory of the Russian Federation, as well as the design documentation.

Results. A pilot project for the Imereti lowland with a centre for ecological monitoring of the problems of the Black Sea coastline destruction and the population of rare animal and plant species has been developed.

Conclusions. The problems arising from negative natural phenomena, anthropogenic impact and other risks for the formation of a comfortable urban environment are defined. Classification of urban planning and spatial planning solutions of scientific and educational centers of ecological orientation is proposed. The architectural concept of the perspective ecological scientific and educational complex has been developed on the example of the Krasnodar Territory on the basis of complex approaches, covering social, functional, economic, ecological and aesthetic aspects of realization of design solutions.
Estimation of the residual service life of reinforced concrete beams of an industrial facility taking into account corrosion wear
Authors: Pshenichkina Valeria A. , Gritsenko Boris S. , Glukhov Anton V. , Gabova Victoria V. , Dubovsky Maxim E.
Published: May 2023

Introduction. Corrosion damage of reinforcement and concrete is an important factor reducing durability of industrial facilities. The article presents the methodology and results of probabilistic calculation of residual life of separate reinforced concrete structures of an industrial building as well as of reinforced concrete structures working in the system. A three-storey open stand with dimensions in terms of 30 × 15 m and 25 m in height is considered. The calculated parameters of the actual state of the structures are obtained on the basis of experimental diagnostic studies.

Materials and methods. According to the results of a full-scale field engineering inspection using standard and non-standard methods of non-destructive testing, the most damaged structures of the framework — reinforced concrete floor beams have been determined. The degree of corrosion damage of working reinforcement and compressed concrete has been determined. The method of probabilistic calculation of a reinforced concrete beam with regard for corrosion deterioration is outlined. The limiting bending moment in the beam section is considered as a nonlinear function of two random arguments — the strength of concrete and the strength of reinforcement. A linear law of corrosion damage accumulation is adopted. The probabilistic characteristics of the limiting bending moment are found by the Monte Carlo method on the basis of the normative method of calculation of a rectangular reinforced concrete section with double reinforcement. The reliability index has been used to determine the numerical values of the probability of failure and operating time.

Results. Statistical characteristics of bending moment limit changing in time from the beginning of concrete protective properties exhaustion to element failure have been obtained. Lifetime before failure for a given guaranteed safety is found out.

Conclusions. The practical application of the probabilistic method combined with field survey data to solve the problem of assessing the residual service life of reinforced concrete beams of a real industrial building is shown.
Implementation of CSCM concrete numerical model for domestic concrete classes
Authors: Safarov Aziz R. , Dorozhinskij Vladimir B. , Andreev Vladimir I.
Published: May 2023

Introduction. The current normative procedure of accounting physical nonlinearity (state diagrams) in the calculation of reinforced concrete structures is presented. The mathematical model of concrete CSCM realized in the software package (PC) LS-DYNA is considered, its features are described, its limits and ways of its application are marked. The numerical model has two ways of its implementation in the calculation model: CSCM_CONCRETE – automatic (based on minimum input parameters of concrete) and CSCM – manual (input of a significant number of input parameters of concrete). Calculation results of both realizations have been compared with the experimental data obtained for beams made according to the domestic standards.

Materials and methods. The objects of the study are concrete and reinforced concrete beams. Experimental data have been taken as a criterion for estimating the reliability of the obtained numerical results. The following parameters have been analyzed in the calculation model: the breaking load, the deflection under the breaking load and the failure pattern. Numerical computations were carried out using the LS-DYNA software package that enables a nonlinear dynamic analysis of structures under different kinds of loads and stresses, and a study of beam collapse under increasing loads with time.

Results. It is not recommended to use CSCM model in any of its implementations for concrete beams made of B20 class concrete. For reinforced concrete beams made of class B30 concrete, both implementations coincide with the experimental data, the difference in the results for both implementations in terms of destruction load is up to 17 %. At the same time, a more accurate implementation of the model is a manual one, for which today it is rational to calculate the properties of concrete using a separate method mentioned in the text of this paper.

Conclusions. The numerical results obtained for a reinforced concrete beam made of B30 class concrete indicate the possibility of applying the CSCM model in the study of reinforced concrete structures.
Analysis of the stress-strain state of the spanning trihedral truss under linear loads
Authors: Melyokhin Evgeniy A.
Published: May 2023

Introduction. The structures of trihedral trusses for roofs and overlaps of industrial and public buildings, various combined systems and as trestle structures of linear objects in different building regions are considered. The work presents a patented design of the spatial three-sided truss with the continuous chords of the closed compound cross-section made of rolled sections with the seamless joints. The pentagonal composite cross-section of the girders is composed of rolled channels and angles. The purpose of numerical studied is the estimation of the stress-strain state (SSS) of a span trihedral truss with placement of a profiled deck covering directly along its upper continuous chords, systematization of the received information for substantiation of element composition of structures as well as the formation of a verification base of numerical experiments for further development of complex scientific studies.

Materials and methods. Numerical research is based on a special-rod model of a spanning trihedral truss. The adopted method takes into account the application of linear static loads with zero variability of values, which simulates the location of the enclosing structure of the corrugated sheeting along the upper chords. The adaptation of the single loads method is oriented to the evaluation of the reaction of the rod system in order to analyze and compare data with the results of the following tasks within the framework of the complex research.

Results. The results characterizing the deflected mode of the trihedral truss model as a distribution of efforts in the rods and vertical displacements of the joints have been obtained. They have been analyzed, their dependencies have been found and the regularities have been revealed.

Conclusions. The analysis of the obtained results shows that the accepted computational model of a trihedral truss adequately reflects its SSS. Practical application of numerical results consists in the possibility of their use for substantiation of element structure at designing a construction of a three-sided truss. The results obtained are included in the verification data base for further numerical studies of actual operation of span trihedral trusses.
Ecological monitoring of conditionally clean areas in Volgograd agglomeration
Authors: Glinyanova Irina Yu. , Erofeev Vladimir T. , Afonin Viktor V.
Published: May 2023

Introduction. The territories of conditionally clean zones are allocated for the development of collective gardens and summer cottages, being formed far from industrial centers in ecologically clean, picturesque places for healthy recreation of citizens. The purpose of the study is to assess the environmental condition of the territories of horticultural non-commercial partnerships (HNP) “Oroshenets”, “Shelf” (Volgograd) in a comparative analysis with the residential area of Srednyaya Akhtuba work settlement (Sredneakhtubinsky district of the Volgograd region), affected by industrial production using aerosol indicators.

Materials and methods. The material of the study was aerosol suspensions prepared from particles, collected from the leaves of Prunus armeniaca L. in accordance with international methods (A. Lukowski, R. Popek et al., 2020) and studied in terms of acidity, electrical conductivity on electrochemical equipment of the “MULTEST” series (Russia); toxicants were identified based on the development of test objects (RF patent No. 2746764); analysis of the disperse composition of aerosols, their amount and mass fraction were carried out according to GOST R 56929–2016. Prediction of sources of natural pollution on the territory of HNP was carried out by the method of remote sensing of the Earth.

Results. The Integral assessment of the ecological condition of the territory of the conditionally clean zone during 2018–2020 demonstrated 1 point (QSNT = 0.699–0.725). Mineralized aerosols (EC = 38.11–42.68 (μS/cm)) were steadily recorded in the atmospheric air, the amount of PM10 reached 70 %, while there were no acid impurities and toxicants.

Conclusions. The ecological status of the HNP area was evaluated as an “ecological norm”, but “with slight changes in flora and fauna”, which indicated a slight pollution of the territory from possible natural sources in the form of active geological structures (projections of foci of surface temperature anomalies, confirmed by the data of the latest satellite systems (Landsat-8, USA) and field studies of “hot spots”).
Geoecological conditions for the construction of a technology park under the Nalaikh region renovation programme (Mongolia)
Authors: Suzdaleva Antonina L. , Slesarev Mikhail Yu. , Jargalsaihan Bolortuya
Published: May 2023

Introduction. Mining is one of the mainstays of economic development in Mongolia today. Renovation of mining areas because of its specific features can be regarded as a separate direction of urban development. The aim of the study is to research the geoecological conditions in Nalaikh region to support the implementation of the government renovation programme. The programme will include the construction of 50 building material factories, 10 glass factories as well as sheep wool processing plants.

Materials and methods. The work is based on the results of comprehensive studies carried out in 2019–2021. They included assessment of the nature, extent of anthropogenic transformation of the earth’s surface and determination of the level of contamination of the main components of the environment capable of accumulating significant amounts of toxic substances (soils and groundwater).

Results. The level of anthropogenic transformation and degree of pollution of the earth’s surface with heavy metals has been estimated on the territory of more than 50 thousand hectares. The content of heavy metals in groundwater has been determined. Zoning of the territory was carried out in accordance with the character of transformation of its geoecological conditions. Anthropogenic geochemical anomalies resulting from pollutant migration from coal mine dumps have been identified.

Conclusions. For the successful implementation of the renovation programme, it is necessary to implement a set of measures to improve geoecological conditions, including the elimination of private mine workings and anthropogenic geochemical anomalies formed as a result of the accumulation of pollutants in some parts of the studied region. The use of contaminated groundwater, including from wells already drilled, should be prohibited during the construction of the technology park facilities and during their subsequent operation.
Regression rationing of labour costs based on the estimation of their actual values by neural network modelling
Authors: Hussein Khoshnaw Y.B. , Bolotin Sergey A. , Нuraini Nadim Q.R. , Boxan Haitham
Published: May 2023

Introduction. Labour rationing is an integral part of effective management of construction production. It is proved by the experience of economically developed countries, where labour rationing is connected with all spheres of enterprises: industrial, technical, organizational, financial, economic and social. Modern methods of labour rationing were created by specialists from economically developed countries. The purpose of this article is to improve the efficiency of the construction industry in the Republic of Iraq by adapting modern labour cost standards to the construction industry.

Materials and methods. The method of neural network modelling was used in the work.

Results. The networks under consideration were tested to obtain labour costs based on the implementation of production standards, which are known to be the inverse of labour costs. As a result of the experiment, instead of actual labour costs the actual output was introduced, and the inverse value was calculated using the output standards obtained from the neural network modelling.

Conclusions. The presented excursus on the labour rationing methods used makes it clear that the creation of appropriate databases requires significant costs and time. Therefore, another alternative to this approach is to use already developed regulatory databases that can be adapted to the construction industry in the Republic of Iraq. In order to implement such an approach, it is necessary to analyze the existing databases and establish such an up-to-date database that would have the greatest correspondence with the actual labour costs specific to the construction industry of the Republic of Iraq. As a generalized conclusion about the practical result of the presented development, a stepwise regression methodology for the formation of labour costs for a selected type of work is presented.
Methodology for evaluating the bearing capacity of a deep excavation barrette in complex geotechnical conditions in Hanoi
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Nikitina Nadezhda S. , Trung Hieu Le ,   Russian University of Transport (RUT)
Published: May 2023

Introduction. At present, the rate of growth in the development of urbanisation processes in large cities is increasing rapidly every year. At the stage of preliminary design of pile foundations, an important part is to determine the bearing capacity of the pile. Barrettes are effective foundation structures, also for high-rise buildings on soft soils. In such conditions, long barrettes are designed. At the same time the used normative methods used of calculating the bearing capacity and settlement do not take into account the features of the stress-strain state of the foundation and the interaction with barrettes in the foundations of high-rise buildings with a developed underground part. Materials and methods. The task has been considered on the basis of the results of field testing with piles (static load method) with the calculation by the analytical method according to the strength characteristics of the soil foundation, described in the regulatory documents SP 24.13330.2011 “Pile Foundations”. A new calculation method is proposed, which is set out in Appendix D of the specified set o.rules, taking into account relevant factors, such as the relative position of piles in the ground, their length, pitch, etc. Results. A graph of the dependence of settlement on load was obtained based on the results of full-scale tests of barrettes with a limiting settlement of 40 mm. Analytical results are compared with field testing of a pile in difficult engineering and geological conditions in Hanoi, Vietnam. Conclusions. The conclusions obtained by the analytical method of calculating the bearing capacity of a single barrette in terms of strength characteristics, taking into account unloading on soft soils during the development of a deep pit, are quite close to the results of static field tests. These solutions can be applied to determine the bearing capacity of piles and barrettes on soft soils.
Influence of the content of complex additives on the deformation properties of cement
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Samchenko Svetlana V. , Zorin Dmitriy A. , Lam Nguyen D.T. , Lam Tang V. ,   Hanoi University of Mining and Geology (HUMG)
Published: May 2023

Introduction. When using concrete and reinforced concrete structures, it is necessary to overcome problems associated with the quality of concrete to shrink in size and experience shrinkage during hardening and drying. To solve problems with shrinkage, special attention is paid to the materials that, when added to ordinary portland cement, make it possible to obtain non-shrinkable, expanding types of cements. A well-known way of producing expanding cements is to grind cement clinker, gypsum and a special additive together. In addition, the introduction of active mineral additives with pozzolanic properties allows to compact the structure of the cement stone, reduce porosity, increase strength and reduce shrinkage. They also save the clinker for the cement production, help to reduce the cost of production and help to reduce the burden on the environment. One of these mineral additives is tripoli. Materials and methods. The effect of additives content on the deformation property of the composite binger was studied using the experiment planning method. Deformation of cement at the age of 2, 3, 7, 14 and 28 days were determined in accordance with the method of results processing in accordance with GOST R 56727–2015, GOST 11052–74. The research was carried out in the laboratory of the Department of Construction Materials Science of the Moscow State University of Civil Engineering. Results. The results obtained are presented as the surface of a second level regression equation describing the dependence of the blinder deformation on the content of complex expanding and pozzolanic additives. As a result of the experiments conducted, the composition with the maximum expansion and the composition with maximum shrinkage using complex additives were obtained. The results will be further used to predict the deformation properties of the binder. Conclusions. Based on the results of this study, the authors will continue to study the properties of binders based on a complex expanding and pozzolanic additive in the future.
Management of urban public green spaces
Authors:   Saint Petersburg State University of Architecture and Civil Engineering (SPbGASU), D’yachkova Olga N. , Mikhailov Alexander E.
Published: May 2023

Introduction. People want effective management and balanced development of urbanised systems. In a comprehensive social, economic and environmental research of human living conditions in the city, various kinds of sociological surveys of the population are applied and foresight sessions are held with subject matter experts to analyse the existing level of safety and comfort of residence. However, in the context of growing urbanized systems, there is an acute shortage of new methods, ways and tools of knowing them for the purpose of effective management and balanced development. Materials and methods. The article presents aspects of the methodology for extracting and structuring knowledge of urban public green spaces in cities. The work is based on the paradigms of ontological engineering and knowledge management. Results. Ontological engineering as a theory and methodology for developing ontologies is actively developing. However, the main success lies in the field of knowledge formalization technology, while the methodology for extracting and structuring knowledge is still under development. The problem of meaningful analysis of the subject area remains open, the relevance of research of which is confirmed by sustainable development goal 11, target 11.7: “by 2030 provide universal access to safe, available and inclusive green spaces and public spaces, especially for women amd children, older and disabled people”. The article describes the process of developing a taxonomy of expert knowledge about urban public green spaces in city. The taxonomy includes classes, subclasses, properties for subclasses and options for properties. Conclusions. The results of the conceptualisation of knowledge of the subject can be used as elements in the construction of the knowledge graph framework. With appropriate refinement, the taxonomy can be in demand for scientific research, design of innovative services and intelligent systems used in urban planning and urban economy.
Operation of braced steel frameworks with regard to assembly and fabrication errors
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Hamaty Youssef R. , Tusnin Alexander R.
Published: May 2023

Introduction. As a building construction material, steel is widely used because of its high mechanical characteristics. Steel load-bearing structures of multi-storey buildings are a system formed by columns, beams, floor slabs and braces. The frame of a multi-storey building has a large number of elements and their connections. Errors in the fabrication, installation and operation of steel frames of multi-storey buildings can lead to a reduction in the load-bearing capacity of structures compared to the design. Deviations from the design position occur because of violations of the technical operatin.rules of the buildings beyond the permissible limits, design errors, imperfect standards and poor quality of work during the fabrication and installation of structures. The current Russian standards do not take into account the impact of fabrication and installation errors on the work of multi-storey frames. The initial geometric defects in the structural system and its individual elements contribute to the difference in performance between the real construction and an idealized one. Materials and methods. The study of the effect of initial imperfections on the stress-strain state of the steel frame is important and relevant. Initial imperfections are taken into account either by applying an equivalent load to the idealized design scheme or by forming a geometrically distorted by imperfections design scheme. The analysis can be linear or geometrically non-linear. Results. The results of the study of braced steel framework performance in the presence of initial imperfections are presented. The effect of initial imperfections in the form of deflection of columns from the vertical is considered. The values of the initial imperfections are determined in accordance with the current RF standards. Conclusions. The results obtained have made it possible to propose a correction factor to the results of the calculation of frames with imperfections to the results of the calculation of an idealized frame.
A flow chart as one of tools improving the quality of repair and construction work
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Kustikova Yulia O. , Pankova Elena V.
Published: May 2023

Introduction. Nowadays, improving the quality of repair-construction works is an important complex problem, insufficient attention to which inevitably leads to their increasing cost, increasing operational costs, increasing the number of current and overhaul repairs, as well as reducing the time between repairs, worsening the quality of life of consumers. In the worst cases, poor quality of repair and construction works can lead to the accidents, become a source of threat to life and health, leading to accidents. The quality of work — is the main purpose of using the technological card; this standardized organizational and technological document contains detailed instructions for the working staff, allowing to understand all the processes to be carried out during the project as well as to evaluate the resources necessary for this. The process map contains a set of measures for the organisation of work with the most efficient use of modern means of mechanisation, technological equipment, tools and fixtures. This document includes the most progressive and rational methods of construction works technology facilitating reduction of time and improvement of work quality and reduction of their cost. The technological card ensures not only economical and high quality, but also safe execution of works, as it contains regulatory requirements and safety rules. Materials and methods. The task is to analyse flow charts for different types of work in major repairs with the identification of a list of shortcomings, errors and inaccuracies in drawing up flow charts. Results. Proposals for correcting basic data and parameters in the flow charts required for operational control of the technological process have been developed. Conclusions. A list of flow charts for different types of work during major repairs has been analysed; a list of shortcomings, errors and inaccuracies in drawing up flow charts that require adjustments has been identified.
Influence of dispersed reinforcement parameters on the high-strength steel fiber concrete creep perfomance
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Kapustin Dmitriy E.
Published: May 2023

Introduction. At the present time, in the construction of nuclear power plants (NPP), non-removable formwork made of high-strength steel fibre concrete (SFRC) is used. Due to improved physical and mechanical properties and high adhesion to monolithic concrete, the SFRC formwork is a load-bearing element. The result is a structure with combined reinforcement in the form of bar reinforcement and high-strength SRFC layers. The calculation of the actual stress-strain state of such structures requires knowing the design characteristics of used materials. High-strength SFRC is understudied material, and research of its properties, especially under long-term loads, is a crucial task. Materials and methods. Experimental studies of the effect of dispersion reinforcement parameters (type of steel fibre and its volume) on the creep value of SFRC made on a high-strength cement-sand matrix have been carried out. The research was carried out on the same matrix composition for three types of steel fibres suitable for the manufacture of 30 mm formwork sheets with a thickness of 30 mm, and most commonly found the in Russian market. A volumetric fibre content of up to 6 % was considered in the study. The load level is 0.3 of the breaking strength (prism strength). Results. The actual values of the SFRC creep parameters required to carry out the calculations of structures with combined reinforcement. Conclusions. It is found that the introduction of steel fiber up to 6 % provides a reduction of ultimate creep measure up to 20 % as compared to a fine-grained matrix. However, with up to 1.5 % volumetric content of fibre, an increase of up to 10 % in creep may also occur as a result of matrix decompaction. In the view of the large number of factors affecting the properties of SFRC, the calculated characteristics should be determined experimentally.
Сalculated parameters for the functional zoning of green space in the central part of Reutov
Authors:   Moscow State University of Civil Engineering (National Research University) (MGSU), Slepnev Mihail A. , Mozgunova Nadeshda V.
Published: May 2023

Introduction. The article devoted to the relevant problem of optimizing the natural framework of the city on the basis of rational use of the territory of the settlement as a public green area. The approach, based on the modern tendencies of urbanization, ecological utility, social benefits and rational use of territories. One of the important elements of the optimization of the ecological environment is the greening of the city space. At present, maintaining the balance of urbanized areas is a priority because with the growth and development of cities, the environment is becoming more and more aggressive. Also, with the increase in the number of residents, the recreational load increases, and due to the high concentration of emissions from motor vehicles and industrial enterprises, the state of urban natural systems is changing, which leads to a deterioration in the quality of life of the population. The system of green spaces of a modern city is being formed to improve the environment, enrich the appearance of the city, create conditions for mass recreation of the population in the natural environment. For the formation of the ecological situation in the city, along with cardinal measures, it is necessary to preserve and develop natural massifs and landscaping of the city territory. The article analyzes the relevant planning opportunities and constraints for urban transformation of the city, and also selects the optimal strategy for spatial development of the reorganization of the natural framework. Materials and methods. The collected attributive information, legal documents and cartographic materials are used in the work. The calculation of potential visitors was carried out on the basis of the normative value for recreational load, and the calculation of visitors to the natural-anthropogenic territorial complex (hereafter — NATC) was carried out by means of field observation. The observation results were processed using the Microsoft Office Excel software, followed by modelling of the project proposal for the use of the Reutov green space in the Qgis software package. Results. On the basis of the conducted research, the excess of the normative value of recreational load of the NATC “Apple Orchard” in Reutov was identified and a functional zoning project, including the design of three functional zones, was proposed. Conclusions. The increased rate of population influx and environmental pollution is forcing a reorganization of the green cores of cities.