检索结果-内蒙古大学图书馆

Dynamic Environmental Impact Assessment of Cross-Sea Bridge Mud Leakage

Dynamic Environmental Impact Assessment of Cross-Sea Bridge ...

2023 International Conference on construction and Real Estate Management: The Human-Centered construction Transformation, ICCREM 2023

作者： Feng, Shilong Feng, Kailun Jiang, Zhongxue Wei, Chenyang Liu, Changyong School of Civil Engineering Harbin Institute of Technology Harbin China Chief Engineer Office Harbin Tianhao Real Estate Development and Construction Co. Ltd. Harbin China

ISBN: (数字)9780784485217

ISBN: (纸本)9780784485217

Life cycle assessment (LCA) is an effective method for construction environmental impact assessment. However, the traditional LCA is suitable to assess the static process and it is challenging to use real-time information for dynamic assessment. In this study, the Bayesian update is introduced into the LCA to facilitate the dynamic assessment of environmental impact caused by serious mud leakage during the construction of the pile foundation of the cross-sea bridge. Through the Bayesian update, the real-time information is used to update and predict the subsequent conditions of construction, to provide recent information for the impact assessment of construction. This method makes it possible to carry out real-time preventions and control measures for environmental pollutions. Proposed method improves the accuracy of environmental impact assessment, and it could provide the on-site managers with informed environmentally-friendly construction decisions. © ASCE.

关键词： Life cycle

来源：评论

学校读者我要写书评

暂无评论

Metaheuristic algorithm inspired by enterprise development for global optimization and structural engineering problems with frequency constraints

引用

engineering Structures 2024年 318卷

作者： Truong, Dinh-Nhat Chou, Jui-Sheng Department of Civil and Construction Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Civil Engineering University of Architecture Ho Chi Minh City Ho Chi Minh Viet Nam

In this study, a novel metaheuristic optimization algorithm inspired by the enterprise development (ED) process was developed. This process encompasses tasks, structure, technology, and human interactions. A mechanism for switching activities was utilized to determine each step by updating the searched solutions. The ED optimizer underwent evaluation against 50 mathematical functions and 54 IEEE Congress on Evolutionary Computation (CEC) functions, and it was compared with six up-to-date algorithms, three winners of CEC 2020 in real-world single-objective constrained optimization, and ten well-known algorithms. The evaluation results revealed that the ED optimizer outperformed the algorithms in mathematical tests. Using finite element simulation, this novel method was applied to minimize steel structure component weights under various frequency constraints. The engineering designs included a 37-bar planar truss, a 52-bar dome, a 72-bar space truss, a 600-bar dome, and a 1,410-bar dome. Optimization results for these structures showed that the developed ED optimizer yielded the optimal solution and required fewer function evaluations. In conclusion, the ED optimizer is a superior metaheuristic algorithm that can effectively solve complex structural design problems. © 2024 Elsevier Ltd

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Establish a Cost Estimation Model for Pre-Sold Home Customization based on BIM and VR 38

Establish a Cost Estimation Model for Pre-Sold Home Customiz...

引用

38th International Symposium on Automation and Robotics in construction, ISARC 2021

作者： Tung, S.H. Wang, K.C. Yu, P.Y. Department of Civil and Construction Engineering Chaoyang University of Technology Taiwan

ISBN: (纸本)9789526952413

Virtual reality (VR) has been widely applied in the construction industry, enabling users to view unfinished buildings in an immersive virtual environment. A game engine can be used to create a virtual environment with parametric characteristics from building information modeling (BIM), enabling the BIM parameters to be presented in the VR environment. This study integrated VR with BIM to facilitate modifications to an apartment. A cost estimation system for modifications was established. The proposed system can provide customers with a first-person view of possible design changes to a home, minimizing discrepancies in seller–customer perceptions. Costs for customer modifications are calculated in real time using the database and the unit price database. © 2021 Proceedings of the International Symposium on Automation and Robotics in construction. All rights reserved.

关键词： construction industry

来源：评论

学校读者我要写书评

暂无评论

Reclamation of Fly Ash and Crumb Rubber in Clay Bricks Using Sodium Metasilicate at Low Curing Temperature to Produce One-Part Geopolymer

SSRN

引用

SSRN 2024年

作者： Krishnan, Aswin Kumar Wong, Yat Choy Lin, Youli Arulrajah, Arul Department of Mechanical and Product Design Engineering Swinburne University of Technology Melbourne Australia Department of Civil and Construction Engineering Swinburne University of Technology Melbourne Australia

This research study was to investigate fly ash (FA) and crumb rubber (CR) in clay bricks using sodium metasilicate at low heating temperatures which is an emerging trend in the construction industry to eliminate landfill depletion problems. The fly ash weight percentages studied was at 5, 10, 15, 20 and 25%, while the crumb rubber was fixed at 1% for all the samples. The samples were treated at 60°C for 72 hours and cured at 160°C for 24 hours to obtain the best optimum curing conditions. The sodium meta silicate powder (Na2SiO3- anhydrous) was used as a solid activator for the alkaline activation of fly ash and crumb rubber to produce a one-part geopolymer (OPG). The varying weight percentages of Na2SiO3- anhydrous was at 2.5, 5, 7.5 and 10%. Compressive strength, cold water absorption, linear shrinkage, initial rate of absorption and thermal conductivity were tested and compared with the properties of clay bricks. The surface morphology of these blends (fly ash and crumb rubber) was examined using scanning electron microscopy. Furthermore, the different Na/Si ratios were identified using EDS analysis. The experimental results indicated that the highest compressive strength of 11.7 MPa was achieved with 25% FA + 1% CR using 10% sodium metasilicate. It was found that thermal conductivity satisfied the requirement for the standard bricks except for 10% FA + 1% CR at 10% sodium metasilicate. This study demonstrates the potential benefits of using fly ash and crumb rubber using sodium metasilicate powder to achieve one-part geopolymer in green buildings could reduce the extraction of natural resources and disposal efficiency. © 2024, The Authors. All rights reserved.

关键词： Morphology

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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...

引用

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

来源：评论

学校读者我要写书评

暂无评论

Deep learning-based chatbot by natural language processing for supportive risk management in river dredging projects

引用

engineering Applications of Artificial Intelligence 2024年 131卷

作者： Chou, Jui-Sheng Chong, Pei-Lun Liu, Chi-Yun Department of Civil and Construction Engineering National Taiwan University of Science and Technology Taipei Taiwan UTRUST Technology Co. Ltd Taipei Taiwan

Dredging projects play a vital role in water conservation, especially for flood control, but they often encounter natural and human-induced risks. This study addresses these challenges by creating a comprehensive knowledge base for dredging risks. This knowledge base serves several essential functions: it aids in immediate and thorough risk prevention, provides practical risk management recommendations, and assists dredging personnel in making informed decisions when dealing with risks. Furthermore, the study introduces an advanced deep-learning model that enhances access to critical information. Users can quickly find relevant risk prevention strategies by inputting keywords. The model's distinctive feature is its ability to analyze unforeseen risks through natural language processing, predict the potential impact and frequency of unexpected events, and propose appropriate risk response measures. This empowers dredging personnel to conduct preliminary risk assessments confidently. The deep learning model seamlessly integrates into LINE's communication platform, creating a river dredging project risk knowledge chatbot. This user-friendly chatbot is accessible to personnel at all project stages, enabling real-time interaction. It offers a practical way to develop and implement risk prevention plans and response measures. In summary, this research presents an innovative approach that enhances the efficiency and safety of dredging projects. By merging a knowledge base with cutting-edge technology and real-time communication, it equips dredging personnel to manage known and unforeseen risks proficiently, ultimately contributing to the success of water conservancy and flood control projects. © 2023 Elsevier Ltd

关键词： Expert systems

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

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)

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：