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Editorial for Advances and applications of deep learning and soft computing in geotechnical underground engineering

Journal of Rock Mechanics and Geotechnical engineering 2022年第3期14卷 671-673页

作者： Wengang Zhang Kok-Kwang Phoon School of Civil Engineering Chongqing UniversityChina Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing UniversityChina National University of Singapore Singapore Singapore University of Technology and Design SingaporeSingapore

We are privileged to be invited by the Honorary Editor-in-Chief,Professor Qihu Qian,Editor-in-Chief,Professor Xia-Ting Feng,and the editorial staff of the Journal of Rock Mechanics and Geotechnical engineering(JRMGE),to serve as Guest Editors for this Special Issue(SI).The purpose of this SI is to review the latest development of machine learning(ML)techniques including the soft computing(SC)and deep learning(DL)methods as well as their key applications in geotechnical underground engineering problems.

关键词： computing learning underground

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Systematic analysis of fracture mechanical properties of cementitious composites with high steel fiber content

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construction and Building Materials 2025年 487卷

作者： Cao, Shaojun Tian, Yue Liu, Songhang Hao, Yifei Tianjin Key Laboratory of Prefabricated Buildings and Intelligent Construction School of Civil and Transportation Engineering Hebei University of Technology Tianjin300401 China

Steel fiber-reinforced cementitious composites (SFRCCs) have garnered significant attention in structural engineering due to their exceptional mechanical properties. Incorporation of steel fibers effectively inhibits micro-crack propagation and the formation of macro cracks in concrete, thereby substantially enhancing its fracture performance. Existing studies primarily focus on the fracture performance of concrete with low steel fiber content (0–2 %);however, research concerning the fracture performance of SFRCC containing a wide range of steel fiber content (0–10 %) is sparse. Additionally, current fracture strength prediction models overlook the coupling effect between matrix strength and steel fibers, limiting their generalizability across diverse material configurations. In order to address these issues, this study investigated the fracture properties of SFRCC materials for varying steel fiber contents based on the reinforcement and toughening mechanisms offered by steel fibers. A quantitative evaluation was also conducted on the existing prediction models for fracture strength and fracture energy based on the existing experimental data and the results obtained in this study. It was found that the influence of matrix and steel fiber content is not independent of the influencing factors of SFRCC fracture strength and fracture energy. Therefore, the coupling effect of matrix and steel fiber on SFRCC fracture properties was considered in this study. Prediction models for SFRCC fracture strength and fracture energy were developed separately by considering different key parameters such as steel fiber content with matrix strength, as well as steel fiber content with matrix fracture energy. The experimental results and prediction models of fracture properties of SFRCC obtained in this study across a wide range of steel fiber can serve as a valuable reference for the application of SFRCC in structural engineering. © 2025 Elsevier Ltd

关键词： Steel fibers

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A Real-Time Monitoring System for Cable Tension with Vibration Signals Based on an Automated Algorithm to Sieve Out Reliable Modal Frequencies

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Structural Control and Health Monitoring 2023年第1期2023卷

作者： Wu, Wen-Hwa Chen, Chien-Chou Lin, Shang-Li Lai, Gwolong Department of Civil and Construction Engineering National Yunlin University of Science and Technology Yunlin640 Taiwan

Cables or suspenders are the critical force-transmitting components of cable-supported bridges, and their timely tension monitoring is consequently the most important issue in the corresponding structural health monitoring. However, very few works regarding the full automation of vibration-based tension estimation have been reported in the literature. To develop a monitoring system of cable tension based on real-time vibration signals, this research first employs an efficient stochastic subspace identification (SSI) method with tailored parameter selection to continuously identify the three frequencies of adjacent modes for the cables of Mao-Luo-Hsi Bridge. More importantly, an automated sieving algorithm is delicately established to obtain the stable modal frequencies by making the best of the specific modal frequency distribution for cables. The ratios between the frequency values identified from SSI analysis are exhaustively checked to systematically extract the qualified cable frequencies and decide their corresponding mode orders. The tension is finally computed with one available cable frequency according to the priority order predetermined by the statistics of identification rate. Demonstrated by analyzing the vibration signals measured from the stay cable of Mao-Luo-Hsi Bridge in real time for two full years, the effectiveness and robustness of this real-time monitoring system have been extensively testified. The long-term success rates for the immediate determination of dependable tension are found to be perfect for 15 of the 18 investigated cables. As for the other three cables, their corresponding success rates are still higher than 99.99% with very few cases of absent or false tension values. © 2023 Wen-Hwa Wu et al.

关键词： Stochastic systems

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Optimal parameters of tuned mass damper for the reduction of wind-induced vibration of high-rise buildings 71

Optimal parameters of tuned mass damper for the reduction of...

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71st International Conference on Vibroengineering

作者： Tan, Ke Xie, Yiming Cao, Fuchao Wang, Yiping Dong, Yinfeng Chongqing Design Group Co. Ltd. Chongqing China Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing University Chongqing China School of Civil Engineering Chongqing University Chongqing China

At present, the use of a tuned mass damper (TMD) to control structural dynamic response under wind or earthquake excitations has become a common method for many high-rise structures. In previous studies, the amplitude of structural dynamic response which is usually viewed as a stochastic process is rarely used as a parameter to evaluate the vibration mitigation performance of a TMD system. In this paper, the motion equations of the structures controlled by a TMD system under wind excitation are established first. Then, the vibration mitigation performance of the TMD system under wind load is analyzed from the point of view of the reduction of the amplitude of response stochastic processes, during the analysis the influence of mass ratio is also taken into account. Finally, the vibration reduction coefficients are obtained as a function of frequency ratio and damping ratio, and the optimal frequency ratio and damping ratio of TMD system can be determined for which the minimum vibration reduction coefficient is achieved. The analysis results show that compared with the uncontrolled structure, the optimization method based on vibration reduction coefficient greatly reduces the amplitude of structure response under wind load and has certain adaptability and reliability. © 2024 JVE International. All rights reserved.

关键词： Vibration analysis

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Evaluation of Ultimate Axial Strain Models for Fiber-Reinforced Polymer-Confined Concrete Cylinders 5

Evaluation of Ultimate Axial Strain Models for Fiber-Reinfor...

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2023 5th International Conference on Advanced Materials and Ecological Environment, AMEE 2023

作者： Chen, Junwei Wang, Yong Zhang, Yafeng Liang, Meng Shandong Quality Inspection and Testing Center of Construction Engineering Co. Ltd. Shandong Jinan China Shandong Academy of Building Research Co. Ltd. Shandong Jinan China Shandong Jianyan Testing and Inspection Technology Co. Ltd. Shandong Jinan China Tengzhou Engineering Construction Service Center Shandong Jinan China School of Civil Engineering and Architecture University of Jinan Shandong Jinan China

Fiber-reinforced polymer (FRP) composite has been widely applied to reinforce and rehabilitate concrete columns in civil engineering. It is necessary to deeply understand the ultimate deformation (i.e., the ultimate axial strain ϵcc ) of FRP-confined concrete columns. A large database including different types of FRP (conventional FRP and large-rupture-strain FRP), concrete compressive strengths (19.4 MPa-169.7 MPa), and cylinder sizes (51 mm-508 mm), as well as various concrete types, is collected in this study. For this reason, several existing ultimate axial strain modes for FRP-confined cylinders have been evaluated via some statistical parameters based on the database. The verification results illustrate that the prediction accuracy of axial strain models is not good enough due to the intrinsic difficulty in predicting deformation and variability of data source, although the available models with better performance can achieve the average ratio between experimental and predicted strain value ( ϵccexpe/ϵccpred ) below 10%. © Published under licence by IOP Publishing Ltd.

关键词： Cylinders (shapes)

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IoT sensor-based BIM system for smart safety barriers of hazardous energy in petrochemical construction

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Frontiers of engineering Management 2022年第1期9卷 1-15页

作者： Lieyun DING Weiguang JIANG Cheng ZHOU School of Civil&Hydraulic Engineering Huazhong University of Science&TechnologyWuhan 430074China Hubei Engineering Research Center for Virtual Safe and Automated Construction(ViSAC)Wuhan 430074China

The accidental release of hazardous energy is one of the causes of construction site *** risk is considerably increased during petrochemical plant construction because the project itself is complex in terms of process,equipment,and *** addition,a general construction safety barrier hardly isolates and controls site hazardous energy ***,this study proposes an Internet of Things(IoT)sensor-based building information modeling(BIM)system,which can be regarded as a new smart barrier design method for hazardous energy in petrochemical *** this system,BIM is used to support the identification of on-site hazardous energy,whereas IoT is used to collect the location of on-site personnel in real time.A hazardous energy isolation rule is defined to enable the system to generate a smart barrier on the web terminal window,thereby ensuring the safety of on-site *** system has been applied to a large-scale construction project in Sinopec for one year and accumulated substantial practical data,which supported the idea about the application of sensor and BIM technology in *** related effects of the system on hazardous energy management are also presented in this work.

关键词： IoT BIM smart safety barrier hazardous energy management petrochemical construction

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Modelling and Optimization of Clean and Affordable Electricity Solution for Small-Scale Savings and Credit Cooperatives(SACCOs)

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Energy engineering 2023年第4期120卷 791-810页

作者： Xiaomei Lin Samuel Bimenyimana ChenWang Godwin Norense Osarumwensa Asemota Jeanne Paula Ihirwe Aphrodis Nduwamungu Etienne Ntagwirumugara Athanase Gace Changfu Yuan Yaowen Chen Changtai Li Shilpi Bora YiYi Mo Jiyu Lai Mabao Wu Yong Tang Merit M.Huang College of Science and Technology The Open University of FujianFuzhou350013China Intelligence and Automation in Construction Provincial Higher–Educational Engineering Research Centre Huaqiao UniversityXiamen361021China African Centre of Excellence in Energy for Sustainable Development University of RwandaKigali4285Rwanda Morayo College Nairobi999070Kenya Department of Economics and Management Hebei University of TechnologyTianjin300401China College of Science and Technology University of RwandaKigali4285Rwanda Fujian Baichuan Construction Technology Co. Ltd.HuliXiamen361021China Haoqi(Xiamen)Construction Technology Co. Ltd.HaicangXiamen361021China School ofDesign Ajeenkiya D Y PatilUniversityPune412105India College of Civil Engineering Huaqiao UniversityXiamen361021China College of Transportation and Civil Engineering Fujian Agriculture and Forestry UniversityFuzhou350100China Highway Southeast Engineering Co. Ltd.Xiamen361100China Fuzhou Sinotom Information Technology Co. Ltd.Fuzhou350001China

Renewable energy exploitation is among the development strategies set by the government of Rwanda on the roadmap to 2023/2024 universal electricity access and theUnitedNations plans by *** previous studies oncleanenergy technologies inRwandahavemostly focusedonhouseholds’usagebut there are currentlynostudies describing the feasibility of clean energy technologies for financial *** skepticism on renewable energy in Africa was previously reported by some *** realized that most SACCOs(Savings and Credit Co-Operatives)in Rwanda use diesel technology for backup/emergency electricity supply,taking consideration of abundant solar resources in Rwanda,having seen the viability and feasibility studies from other countries of renewable energy for different institutions(financial included);thiswork uses theHOMEREnergy Software and the electricity load profile of a typical SACCO in Rwanda to analyse the affordability and viability of on-site renewable energy generation for SACCO in *** results reveal that a solar PV systemwith storage can be the optimal solution(with levelized cost of electricity(LCOE)of 0.713$/kWh which is cheaper than 0.73$/kWh for diesel technology)for SACCOs located in both off-grid areas and grid-connected areas(with 0.041$/kWh LCOE which is lower than the current electricity tariff in Rwanda).The findings in this work can serve as basic tools/materials for policy drafters in Rwanda on how financial institutions can contribute to climate change mitigation through self-renewable energy exploitation.

关键词： HOMER energy solar energy SACCO in Rwanda climate change mitigation

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Research on buffer structure and flow field simulation of swash plate plunger type hydraulic transformer

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High technology Letters 2022年第4期28卷 425-433页

作者： WANG Xiaojing HUO Shuhang LI Wenjie Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicle Beijing University of Civil Engineering and ArchitectureBeijing 102616P.R.China Beijing Engineering Research Center of Monitoring for Construction Safety Beijing University of Civil Engineering and ArchitectureBeijing 102616P.R.China School of Mechanical and Power Engineering Harbin University of Science and TechnologyHarbin 150080P.R.China

In order to solve the problem of excessive noise and vibration during the operation of the hydraulic transformer,an optimization method of valve plate damping hole structure is proposed to alleviate the phenomenon of pressure ***,the mathematical model of oil pressure gradient in the plunger cavity is established,and the incremental equation of pressure change is ***,a kind of buffering structure is proposed,the corresponding relationship between the pressure change and the envelopment angle of the buffering hole and the aperture size is determined by analyzing the oil pressure change curve in the plunger ***,the flow field models with buffering holes are established,and the transient simulation of the pressure change process under the optimal solution is carried out with ANSYS software and the flow field pressure distribution contours are *** the analysis of simulation results,it is concluded that the optimal envelope angle of the three buffer holes ofA-T-B-Ais 5°,and the optimal aperture is 1.8 mm,1.6 mm,and 1.7 mm,*** buffer hole can achieve a better-buffering effect in the range of variable pressure angle[0°,101°].The buffer hole structure can effectively alleviate the pressure shock and reduce the noise level,which lays a foundation for the design and theoretical research of hydraulic transformers.

关键词： hydraulic transformer pressure shock buffer structure flow field simulation dynamic grid

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construction Research Congress 2022

Construction Research Congress 2022

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construction Research Congress 2022: Project Management and Delivery, Controls, and Design and Materials, CRC 2022

作者： Ahmed, Muaz O. El-Adaway, Islam H. Coatney, Kalyn Dept. of Civil Architectural and Environmental Engineering Missouri Univ. of Science and Technology RollaMO United States Hurst-McCarthy Professor of Construction Engineering and Management Professor of Civil Engineering and Founding Director of Missouri Consortium of Construction Innovation Dept. of Civil Architectural and Environmental Engineering and Dept. of Engineering Management and Systems Engineering Missouri Univ. of Science and Technology RollaMO United States Dept. of Agricultural Economics Mississippi State Univ MississippiMS United States

ISBN: (纸本)9780784483978

The global and national spending on public infrastructure projects continues to increase tremendously. Accordingly, contractors need to adopt efficient bidding strategies to cope with the legal requirement of competitive bidding within the public infrastructure projects. Moreover, contractors usually acquire the services of subcontractors to handle large projects. However, despite the previous research efforts on developing bidding models, there is still a lack of research that tackles the multi-stage construction bidding, where subcontractors submit quotations/bids first and general contractors bid second for the whole project. As such, this paper aims to develop a game-theoretic bidding model for multi-stage construction bidding. To this end, the authors utilized an interrelated methodology comprised of: (1) investigating existing bidding models that are based on a game theory approach;(2) deriving of a bid function for the multi-stage construction bidding following the low bid method where the lowest bidder is the winner;(3) simulating multi-stage bidding environment;and (4) validating the derived bid function and simulation model utilizing data of 808 US public infrastructure projects. Results indicate that the derived bid function gives general contractors a competitive advantage by reducing the occurrence and magnitude of earning negative profits (known as the winner's curse) while winning a reasonable number of projects;and hence, resulting in a higher expected profit. Ultimately, this study adds to the body of knowledge by providing a bidding model for the multi-stage construction bidding that shall aid contractors in dealing with the uncertainties within the associated decision-making process. © 2022 ASCE.

关键词： Contractors

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Experimental study on the movement law of overlying rock non-pillar coal overhead mining

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Journal of Mountain Science 2023年第6期20卷 1759-1773页

作者： LI Yong ZHENG Jing WANG Feng-nian MA Xin-gen ZHANG Rui-xue SUN Ying-ying YIN Jian-bin TAO Zhi-gang College of Geoscience and Surveying Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China Shanxi Provincial Transportation Technology Research and Development Co.Ltd. Key Laboratory of Highway Construction and Maintenance Technology in Loess AreaTransportation IndustryTaiyuan 030000China Huaneng Coal Technology Research Co.Ltd. Beijing 10o83China State Key Laboratory for Geo Mechanics and Deep Underground Engineering China University of Mining and Technology-BeijingBeijing 10083China School of Mechanics and Civil Engineering China University of Mining and Technology-BeijingBeijing 100083China

Pillarless coal mining technology is a new practical *** on the compensating mechanical behavior of the Negative Poisson’s Ratio(NPR)anchor cable on the roof,the roadway was successfully retained by the top cutting and pressure relief *** study utilizes the Digital Speckle Monitoring(DIC monitoring),stress-strain monitoring,and infrared thermal imaging systems to conduct physical model experiment of similar materials from the displacement,stress-strain,and temperature fields to investigate in depth the fracture change law of the overlying *** addition,it uses FLAC3D numerical simulation to invert the surface displacement *** results show that the non-pillar overhead mining under the 110 mining method has little influence on the rock crack in the middle of the coal seam,and the crack development area is mainly concentrated in the overlying rock mass of the upward coal *** compensatory mechanical behavior of NPR anchor cable and the dilatation characteristics of rock mass have a good effect of retaining roadway along goaf,and can also reduce surface *** 110 mining method provides a scientific basis for ecological environment protection and the development of other kilometer deep soft rock high ground stress underground projects.

关键词： No pillar mining Overhead mining NPR anchor cable Physical model of similar materials FLAC3D Numerical simulation Motion of overburden

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