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Numerical Analysis on the Effect of Vital Design Parameters on the Seismic Performance of Shear Walls with Horizontal Ring Connection

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IOP Conference Series: Earth and Environmental Science 2021年第4期719卷

作者： Jian Zhou Tao Zhang Liming Li Zhipeng Guo Qiancheng Shi China Construction Science & Technology Group Co. Ltd. Beijing 100195 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China

Prefabricated shear walls are currently widely applied in mid-to-high-rise structures. As a new type of structural form of assembled shear walls, the ring connection assembled concrete shear wall has clear mechanical mechanism, easy construction and better performance and other significant advantages, which are gradually being applied in actual engineering. However, few systematic studies are carried on this new type of shear wall structure, and a complete theoretical system for guiding the design could not be given, especially in terms of mechanical mechanism and seismic performance, more detailed research work is needed. This paper uses numerical simulation as the main method to study the influence of different design variables such as shear span ratio, buckle size, axial compression ratio on the mechanical properties of the connection area in shear wall and the overall seismic performance of the structure. In this way, the theoretical basis for further optimizing the structural performance of the shear wall connection with ring connection.

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苎麻表面接枝改性及其对苎麻纤维增强环氧复合材料力学性能与界面性能的影响研究（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2019年第9期20卷 660-674页

作者： Anna DILFI KF Zi-jin CHE Gui-jun XIAN Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of TechnologyHarbin150090China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin150090China School of Civil Engineering Harbin Institute of TechnologyHarbin150090China

目的:通过在苎麻纤维表面接枝纳米二氧化硅颗粒,改善苎麻纤维与环氧树脂的界面粘结性能,从而提升苎麻纤维增强环氧树脂复合材料的力学性能。创新点:将纳米二氧化硅颗粒接枝到苎麻纤维表面,从而大幅提升苎麻纤维与环氧树脂的界面粘结性... 详细信息

目的:通过在苎麻纤维表面接枝纳米二氧化硅颗粒,改善苎麻纤维与环氧树脂的界面粘结性能,从而提升苎麻纤维增强环氧树脂复合材料的力学性能。创新点:将纳米二氧化硅颗粒接枝到苎麻纤维表面,从而大幅提升苎麻纤维与环氧树脂的界面粘结性能与复合材料的力学性能。方法:利用十二烷基硫酸钠均匀分散二氧化硅纳米粒子,并在硅烷偶联剂作用下,将二氧化硅纳米粒子接枝到苎麻纤维表面。结论:纳米二氧化硅接枝到苎麻纤维表面大幅提升了纤维表面粗糙度,降低了纤维亲水性能,升高了纤维与环氧树脂的界面粘度,从而改善了复合材料的力学性能。

关键词：纳米二氧化硅十二烷基硫酸硅烷偶联剂苎麻纤维力学性能界面性能

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Numerical investigation on prestressed shear key splice connections for onshore wind turbine foundations

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Engineering structures 2025年 339卷

作者： Zhang, Dongliang Liu, Wantong Wang, Fei Yu, Zhe Wu, Xiangguo Li, Tianhao Fu, Kun Magar, Anish Thapa Hwang, Hyeon-Jong Xian, Xiangping PowerChina Huadong Engineering Corporation Limited Hangzhou311122 China School of Civil Engineering Harbin Institute of Technology Harbin150090 China Department of Architecture and Civil Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Tong999077 Hong Kong College of Civil Engineering Fuzhou University Fuzhou350108 China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of the Industry and Information Technology Harbin Institute of Technology Harbin150090 China School of Architecture Konkuk University Seoul05029 Korea Republic of

Prestressed shear key splice connections are used for the assembly of prefabricated foundation modules in wind turbine towers. This study proposed a simplified section analysis to estimate the flexural moment strength of the shear key splice connections. The proposed method considered the structural deformation and unbonded prestressing tendon effect. Further, to investigate the effects of loading type, initial prestressing force, and shear span-to-depth ratio on the structural performance of the shear key splice connections, finite element analysis was performed on the precast segmental beams using the shear key splice connections. The section analysis results were compared to the finite element analysis results of the precast segmental beams under various initial prestressing forces, and the section analysis results agreed with the finite element analysis results. The shear span-to-depth ratio significantly affected the structural performance of the shear key splice connections. As the shear span-to-depth ratio decreased, the shear resistance increased because the failure mode changed from flexural failure due to the separated shear keys to direct shear failure of the shear keys. © 2025 Elsevier Ltd

关键词： Structural dynamics

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Local buckling of stainless steel stub columns with novel octagonal hollow sections

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Engineering structures 2025年 338卷

作者： Zhong, Yukai Jiang, Ke Chen, Man-Tai Su, Andi Zhao, Ou Research Center for Wind Engineering and Engineering Vibration Guangzhou University Guangzhou China School of Civil and Environmental Engineering Nanyang Technological University Singapore Department of Civil and Natural Resources Engineering University of Canterbury Christchurch New Zealand State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai200240 China Shanghai Key Laboratory for Digital Maintenance of Buildings and Infrastructure Department of Civil Engineering Shanghai Jiao Tong University Shanghai200240 China Key Lab of Structures Dynamic Behaviour 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

Octagonal hollow section, a novel type of polygonal hollow sections, combines the advantages of traditional circular and rectangular hollow sections while mitigating their limitations, with higher load-carrying capacities over rectangular hollow sections due to smaller plate element widths and better constructability over circular hollow sections owing to multiple flat faces providing operation platforms for welded and bolted connections. The present paper reports experimental and numerical studies on the local buckling behaviour of stainless steel octagonal hollow sections under axial compression. The testing programme included axial compression tests on fifteen stainless steel octagonal hollow section stub column specimens with five different outer cross-section dimensions and three different wall thicknesses, as well as tensile coupon tests and initial local geometric imperfection measurements. In parallel with the testing programme, a numerical modelling programme was carried out, with finite element models developed and validated against the test results and afterwards adopted to carry out parametric studies. The test and numerical data were used to evaluate the applicability of relevant design rules, as specified in the European code, American specification and ASCE standard, to stainless steel octagonal hollow sections. The evaluation results generally revealed that (i) the three sets of codified slenderness limits were unsafe when used for cross-section classification of stainless steel hexagonal hollow sections, (ii) the European code and American specification resulted in overall accurate and consistent cross-section compression resistance predictions for stainless steel octagonal hollow sections, but still with some overly conservative predictions for non-slender cross-sections and slightly unsafe predictions for those at the boundary of non-slender and slender cross-sections, and (iii) the ASCE standard provided overall scattered and inaccurate cross-sec

关键词： Welding codes

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Seismic performance of buckling-restrained braced steel frames subjected to earthquake main shock-aftershock sequences

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Journal of Physics: Conference Series 2022年第1期2230卷 012026页

作者： Chao Gong MingMing Jia XuanHao Cheng Mishel Gritcuk China Metallurgical Construction Research Institute Co. Ltd. Beijing 100088 Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China School of Civil Engineering Harbin Institute of Technology Harbin 150090 China

Recently, there are many papers report the development of some new buckling-restrained braced (BRB) frames and the evaluation of its characteristics. At the same time self-centering buckling-restrained braced (SCBRB) frames are considered as new solutions for the increasing of the structural resilience. In this thesis, the seismic performance of structures is analyzed subjected to earthquake main shock-aftershock sequences. There is comparison of two types of the additional BRB elements, and also there is comparison between them and original steel frame to show the effect of using BRB and SCBRB elements. To compare the seismic performance of BRBF and SCBRBF, the same main shock-aftershock sequences were used in this part. Because of the flag-shaped hysteretic curve of the SCBRB elements, big amount of the energy was dissipated during the motion. Compared to steel frame, smaller seismic responses and residual deformation occurred the structure. BRBF and SCBRBF can control the seismic responses effectively due to the energy dissipation of BRB, and SCBRB can also reduce the structural residual deformation. The earthquake aftershock after earthquake main shock can increase the structural damage and enlarge the structural seismic responses.

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The Influence of Community Opening on Road Capacity

The Influence of Community Opening on Road Capacity

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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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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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Recovering compressed images for automatic crack segmentation using generative models

arXiv

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arXiv 2020年

作者： Huang, Yong Zhang, Haoyu Li, Hui Wu, Stephen Key Laboratory of Intelligent Disaster Prevention and Mitigation for Civil Infrastructures Ministry of Industry and Information Technology Harbin Heilongjiang150090 China Ministry of Education Key Laboratory of Structural Dynamic Behavior and Control School of Civil Engineering Harbin Institute of Technology Harbin China Institute of Statistical Mathematics Research Organization of Information and Systems 10-3 Midori-cho Tachikawa Tokyo190-8562 Japan Graduate University for Advanced Studies SOKENDAI 10-3 Midori-cho Tachikawa Tokyo190-8562 Japan

In a structural health monitoring (SHM) system that uses digital cameras to monitor cracks of structural surfaces, techniques for reliable and effective data compression are essential to ensure a stable and energy-efficient crack images transmission in wireless devices, e.g., drones and robots with high definition cameras installed. Compressive sensing (CS) is a signal processing technique that allows accurate recovery of a signal from a sampling rate much smaller than the limitation of the Nyquist sampling theorem. The conventional CS method is based on the principle that, through a regularized optimization, the sparsity property of the original signals in some domain can be exploited to get the exact reconstruction with a high probability. However, the strong assumption of the signals being highly sparse in an invertible space is relatively hard for real crack images. In this paper, we present a new approach of CS that replaces the sparsity regularization with a generative model that is able to effectively capture a low dimension representation of targeted images. We develop a recovery framework for automatic crack segmentation of compressed crack images based on this new CS method and demonstrate the remarkable performance of the method taking advantage of the strong capability of generative models to capture the necessary features required in the crack segmentation task even the backgrounds of the generated images are not well reconstructed. The superior performance of our recovery framework is illustrated by comparing with three existing CS algorithms. Furthermore, we show that our framework is extensible to other common problems in automatic crack segmentation, such as defect recovery from motion blurring and *** Codes 62P30, 97M50 Copyright © 2020, The Authors. All rights reserved.

关键词： Compressed sensing

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