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International Conference on Construction and Real Estate Management 2019: Innovative Construction Project Management and Construction Industrialization, ICCREM 2019

作者： Chen, Xue Wang, Yaowu Dept. of Construction Management Harbin Institute of Technology Harbin150000 China Dept. of Construction Management Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Key Lab of Smart Prev. and Mitigation of Civ. Eng. Disasters of the Min. of Indust. and Info. Technol. Harbin Institute of Technology Harbin150000 China

ISBN: (数字)9780784482308

ISBN: (纸本)9780784482308

With the development of social economy and the improvement of living standards, the drawbacks of closed residential areas have become increasingly prominent. The traditional residential area model has been unable to adapt to the development needs of China's urban core land and the needs of the growing daily life of residents. In February 2016, the "Opinions of the Central Committee of the Communist Party of China and the State Council on Further Strengthening the Management of Urban Planning and Construction" proposed that the new residential buildings in China should promote the block system. In principle, closed residential quarters will no longer be built. The completed residential quarters and unit complexes should be gradually opened. In this context, this paper builds a mathematical model based on dynamic game theory to analyze the impact of opening different types of communities on surrounding roads, and further explore whether the open community can optimize the road network structure, improve road capacity, and traffic conditions. © 2019 American Society of Civil Engineers.

关键词： Roads and streets

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Stereovision measurement of 3D postures of a semi-submersible floating wind turbine model in wave test 9

Stereovision measurement of 3D postures of a semi-submersibl...

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9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019

作者： Shan, Baohua Xiao, Yiqing Li, Chao Liu, Yang Zhou, Shengtao Xue, Zhilin School of Civil Engineering Harbin Institute of Technology Harbin150090 China Key Lab of Structures Dynamic Behavior and Control of Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Mining of Industry and Information Technology Harbin Institute of Technology Harbin150090 China Harbin Institute of Technology Shenzhen Graduate School Harbin Institute of Technology Shenzhen518055 China

To measure 3D postures of a semi-submersible floating wind turbine model in wave test, a stereovision measurement method based on a reference plane established by calibration board is proposed in this paper. The world coordinate system transforms from the left camera system to the surface of the measured structural model through the coordinate transformation. A regular wave test of semi-submersible floating wind turbine model is proceeded with the stereovision measurement system. The displacements and angles of rotation in three direction on the measured model are acquired simultaneously, and the power spectral densities of the model's displacements are calculated. Experimental results indicate that the displacement time-histories measured by the proposed stereovision method agree well with those obtained by the laser displacement meter. This verifies that the proposed stereovision approach is reliable and useful for measuring the 3D postures of multiple points on the model. © 2019 9th International Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII 2019 - Conference Proceedings. All rights reserved.

关键词： Structural health monitoring

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Contrastive analysis of snow load value and influence factors among Chinese and foreign building load codes

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Jianzhu Jiegou Xuebao/Journal of Building structures 2019年第6期40卷 14-23页

作者： Zhang, Qingwen Zhang, Borui Liu, Mengmeng Zhang, Guolong Mo, Huamei Fan, Feng Zhou, Jun Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China Land and Property Management Office of China Railway Harbin Bureau Group Co. Ltd Harbin150006 China

Based on a review of recent building load codes, a comparative analysis of the values of snow load of the existing codes and the corresponding controlled factors were conducted in this paper in order to identify deficiencies for improvement. The comparative results show that the systematic frameworks of the codes in different countries are similar. They all adopts the ground snow loads (basic snow pressure) multiplied by a series of controlled factor coefficients for the roof snow loads, while the latter can be divided into three categories as basic one, drift one and slide one;different codes adopt different values of these three categories. Therefore, it is suggested that in the development of next generation of Chinese load code for the design of building structures, the basic and drift roof snow loads should be inherited and improved while the slide one should be ***, the corresponding controlled factors can be classified into two categories as the external environment and the building itself by summarizing different load codes. The controlled factors which have high influence but have not been considered in the Chinese code are then discussed based on the statistical weight of them in the foreign codes. As a result, the following factors are proposed in this paper to achieve the goal of systematic framework optimization of the snow load for the development of the next generation of the Chinese load code for the design of building structures: the rain-on-snow factor which considers the characteristics of rainfall and slope roofs, the exposure factor which considers the marco landform climate and meso building surrounding, the thermal factors which considers the building heated temperature and roof thermal resistance, and the material factor which considers the smoothness of roof. © 2019, Editorial Office of Journal of Building structures. All right reserved.

关键词： Roofs

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A Discrete Event Simulation-Based Analysis of Precast Concrete Supply Chain Strategies Considering Suppliers' Production and Transportation Capabilities

A Discrete Event Simulation-Based Analysis of Precast Concre...

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International Conference on Construction and Real Estate Management 2019: Innovative Construction Project Management and Construction Industrialization, ICCREM 2019

作者： Chen, Shiwei Feng, Kailun Lu, Weizhuo Wang, Yaowu Chen, Xue Wang, Shuo Dept. of Construction Management Harbin Institute of Technology Harbin150000 China Dept. of Civil Environmental and Natural Resources Engineering Lulea Univ. of Technology Lulea97187 Sweden Dept. of Construction Management Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150000 China Zhonghuan Information College Tianjin Univ. of Technology Tianjin300380 China

ISBN: (数字)9780784482308

ISBN: (纸本)9780784482308

The production and transportation capabilities of a precast concrete (PC) component supplier have great impact on the construction of a PC building project. In China, the production and transportation capabilities of different PC suppliers can vary greatly, which will influence contractors' selection of PC supply chain strategies. However, previous studies often considered the capabilities of PC suppliers to be ideal and failed to compare different PC supply chain strategies under different levels of suppliers capabilities. This study collects detailed data from a PC building project and uses discrete event simulation (DES) to compare different supply chain strategies under different production and transportation capability levels of PC suppliers. Construction duration, construction cost, and greenhouse gas emissions are selected as indicators to compare three different supply chain strategies: just-in-time, on-site storage, and off-site storage. The strengths and weaknesses of each strategy under different capabilities of PC suppliers are found. The results provides guidance for contractors in selecting supply chain strategies when considering PC suppliers' production and transportation capabilities. © 2019 American Society of Civil Engineers.

关键词： Precast concrete

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Hysteretic energy prediction method for mainshock-aftershock sequences

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Earthquake Engineering and Engineering Vibration 2018年第2期17卷 277-291页

作者： Zhai Changhai Ji Duofa Wen Weiping Li Cuihua Lei Weidong Xie Lili Key Lab of Structures Dynamic Behavior and Control(Harbin Institute of Technology) Ministry of EducationHeilongjiangHarbin 150090China School of Civil Engineering Harbin Institute of TechnologyHarbin 150090China Shenzhen Graduate School Harbin Institute of Technology Shenzhen 518055China Institute of Engineering Mechanics China Earthquake AdministrationHarbin 150080China

structures located in seismically active regions may be subjected to mainshock-aftershock（MSAS）*** study selected two kinds of MSAS sequences,with one aftershock and two aftershocks,*** aftershocksThe MSAS sequence with one aftershock exhibited a 10%to 30%hysteretic energy increase,whereas the MSAS sequence with two aftershocks presented a 20%to 40%hysteretic energy ***,a hysteretic energy prediction equation is proposed as a function of the vibration period,ductility value,and damping ratio to estimate hysteretic energy for mainshockaftershock sequences.

关键词： hysteretic energy mainshock-aftershock sequences SDOF system relative intensity prediction equation

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Analyzing Risks in Public-Private-Partnership Projects: An Integrated Model of Sensitive Analysis and Monte Carlo Simulation

Analyzing Risks in Public-Private-Partnership Projects: An I...

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2018 International Conference on Construction and Real Estate Management: Construction Enterprises and Project Management, ICCREM 2018

作者： Feng, Chong Wang, Yaowu Dept. of Construction Management Harbin Institute of Technology Harbin150001 China Key Lab of Structures Dynamic Behavior and Control Ministry of Education Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters Ministry of Industry and Information Technology China

ISBN: (数字)9780784481752

ISBN: (纸本)9780784481752

Compared with traditional financing mode of construction, public-private-partnership (PPP) mode has the great opportunity that private enterprises develop rapidly and solved the shortcomings that the amount of infrastructure investment is large and governments lack funds. Thus PPP mode is being adapted extensively. The keys to successfully implement PPP mode are effectively identifying and analyzing risks in PPP projects, in order to achieve the risk management of PPP projects. The research is aimed to establish a risk analysis model of PPP projects combining the sensitive analysis and Monte Carlo simulation. Then it uses a real case "Shijiazhuang International Exhibition Center" to verify this model and proposes strategies to deal with the main risks. The result of this case study proved effectiveness of the proposed model, which can be used in further risk analysis of PPP projects. © 2018 American Society of Civil Engineers.

关键词： Risk analysis

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Post-fire assessment of mechanical properties of polypropylene-fibered reactive powder concrete using non-destructive testing methods 12th

Post-fire assessment of mechanical properties of polypropyle...

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12th fib International PhD Symposium in Civil Engineering

作者： Abid, Muhammad Hou, Xiaomeng Zheng, Wenzhong Shi, Shuomang Key Lab of Structures Dynamic Behavior and Control Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China

ISBN: (纸本)9788001064016

Reactive powder concrete (RPC) is an advanced generation of concrete having superior qualities than traditional types of concretes. However, fire may severely affect its quality and strength. In this paper mechanical properties of RPC containing polypropylene (PP) fibers were studied experimentally after exposure to high temperature. The quality of concrete was also assessed by non-destructive testing (NDTs) such as ultrasonic pulse velocity (UPV) method and resonance frequency (RF) method. dynamic elastic modulus has been determined by available equation from NDTs measurements. The results show that an initial increase in strength was observed up to 300℃. However, a gradual decrease in strength occurred for temperature higher than 300℃. Constitutive relationships have been proposed for structural strength assessment through NDTs. © 2018 Czech Technical University in Prague. All rights reserved.

关键词： Nondestructive examination

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How stability coefficient agrees and differs between national codes and how it is addressed in Standard GB 50005-2017

How stability coefficient agrees and differs between nationa...

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2018 World Conference on Timber Engineering, WCTE 2018

作者： Zhu, Enchun Huo, Liangliang Niu, Shuang Key Lab. of Structures Dynamic Behaviour and Control Harbin Institute of Technology Ministry of Education Harbin150090 China School of Civil Engineering Harbin Institute of Technology P.O. Box 2453 73 Huanghe Road Nangang District Harbin150090 China

To revise the national Code for Design of Timber structures GB 50005-2003, the methods for calculation of the stability coefficient in timber design codes of various countries were compared and analysed. Considering the characteristics of modern wood products, new and unified equations for calculation of the stability coefficient applicable to members made of various wood products were proposed, in which the traditional treatments of stability in the China national timber design code were kept, giving the newly issued Standard for Design of Timber structures GB 50005-2017 continuity and consistency. The constants in the unified equations were determined through regression with respect to different wood products, and the error in calculation of the stability coefficient was basically within 10%. This study facilitates reasonable design of members made of imported wood products in addition to the domestic timber. © WCTE 2018 Committee.

关键词： Stability

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Second order hierarchical partial least squares regression-polynomial chaos expansion for global sensitivity and reliability analyses of high-dimensional models

arXiv

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arXiv 2019年

作者： Bu, Ling-Ze Zhao, Wei Wang, Wei School of Civil Engineering Harbin Institute of Technology Harbin150090 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China

To tackle the curse of dimensionality and multicollinearity problems of polynomial chaos expansion for analyzing global sensitivity and reliability of models with high stochastic dimensions, this paper proposes a novel non-intrusive algorithm called second order hierarchical partial least squares regression-polynomial chaos expansion. The first step of the innovative algorithm is to divide the polynomials into several groups according to their interaction degrees and nonlinearity degrees, which avoids large data sets and reflects the relationship between polynomial chaos expansion and high dimensional model representation. Then a hierarchical regression algorithm based on partial least squares regression is devised for extracting latent variables from each group at different variable levels. The optimal interaction degree and the corresponding nonlinearity degrees are automatically estimated with an improved cross validation scheme. Based on the relationship between variables at two adjacent levels, Sobol’ sensitivity indices can be obtained by a simple post-processing of expansion coefficients. Thus, the expansion is greatly simplified through retaining the important inputs, leading to accurate reliability analysis without requirements of additional model evaluations. Finally, finite element models with three different types of structures verified that the proposed method can greatly improve the computational efficiency compared with the ordinary least squares regression-based method. © 2019, CC BY-NC-SA.

关键词： Digital elevation model

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Case study on the Synchronous Swivel of Large-Weight T-rigid Frame Bridge

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IOP Conference Series: Earth and Environmental Science 2020年第5期510卷

作者： Qinghe Wang Guoming Dong Baligasima Patrick Jiaxi Liu School of Civil Engineering Shenyang Jianzhu University Shenyang 110168 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China

Swivel technique has been vividly recognized and generally adopted for the T-rigid frame bridge in practice, and this has been achieved by tensioning the prestressed stranding via the ball hinge at the centre of the rigid frame bridge. Although the technique has been adopted and used, very limited study has been devoted to the feasibility of synchronous swivel for double-swing synchronous swivel T-rigid frame bridges to date. This study aims at analysing the construction control of a synchronous swivel T-rigid frame bridge with the self-weight of 12,000 ton for each wing, and providing simplified procedures to determine the unbalanced weight and friction coefficient of the rotating bridge. This study will provide guidance for the future similar projects.

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