检索结果-内蒙古大学图书馆

作者： Haiming Liu Xiaxin Tao ZhengruTao Yifang Qin State Key Laboratory of Bridge Engineering Structural Dynamics China Merchants Chongqing Communication Research & Design Institute Co.Ltd School of Civil Engineering Harbin Institute of Technology Institute of Engineering Mechanics CEA

To study the variation of hydrodynamic pressure on concrete bridge pier with submerged depth in water, a series of shaking table model tests are completed recently. The result shows that the pressures increase with submerged depth obviously with a similar rate for all pier models, input direction combinations and total water depths. The hydrodynamic pressures and the rates increase with the total water depth and input intensity. The pressures on the three models with cross section, rectangular, elliptic and variable rectangular, are varied and different from the provision on the shape coefficient of pier in seismic design codes of highway bridges. The effect of the absorbing stuff adopted in the tests to reduce the potential reflection wave is not obvious. The result suggests to fix more sensors not only at central and but also along the edge lines, to examine the potential horizontal variation of pressures on upstream faces of the piers with different section shapes and the reflected wave must be eliminated with some new way in future test to close to the reality.

关键词： Seismic Hydrodynamic Pressure Concrete bridge pier Submerged depth Shaking table test

来源：评论

学校读者我要写书评

暂无评论

Numerical Simulation of Hydrodynamic Pressure on Concrete bridge Pier in Water from a Series of Model Tests

Numerical Simulation of Hydrodynamic Pressure on Concrete Br...

引用

作者： Yifang Qin Xiaxin Tao Haiming Liu Zhengru Tao Institute of Engineering Mechanics CEA School of Civil Engineering Harbin Institute of Technology State Key Laboratory of Bridge Engineering Structural Dynamics China Merchants Chongqing Communication Research & Design Institute Co.Ltd

To develop numerical procedure to simulate hydrodynamic pressure on concrete bridge pier in water, finite element models are built by software ADINA with the same sizes and material properties in a set of shaking table tests in this paper. The results our numerical simulations show that the all pressures on the three piers decrease with the submerged depth at the similar rate as test data shows, and the mean values of the ratios of numerical results to the test data are mainly from 0.8 to 1.0. The pressures on piers with different section shapes at same depth are varied and the relative order is not stable. The finding is similar to that from the test data, but different to the shape coefficient values provided in some seismic design codes of highway bridges. It suggests to check what kind of horizontal variation of hydrodynamic pressures at same depth level is there from the center to the edges. The pressures with reflected wave are approximately half to two third of those without reflected wave. It means that the reflection effect reduce the hydrodynamic pressure on bridge pier obviously. The effectivity of the absorbing stuff on the side walls of the tank in the tests must be improved, or a new way to replace this kind of measure must be worked out.

关键词： Numerical simulation Seismic hydrodynamic pressure Concrete bridge pier

来源：评论

学校读者我要写书评

暂无评论

CANONICAL-CORRELATION-BASED FAST FEATURE SELECTION FOR structural HEALTH MONITORING

arXiv

引用

arXiv 2021年

作者： Zhang, Sikai Wang, Tingna Worden, Keith Sun, Limin Cross, Elizabeth J. Department of Bridge Engineering Tongji University Shanghai China Dynamics Research Group Department of Mechanical Engineering The University of Sheffield Sheffield United Kingdom Shanghai Qizhi Institute Shanghai China State Key Laboratory of Disaster Reduction in Civil Engineering Tongji University Shanghai China

Feature selection refers to the process of selecting useful features for machine learning tasks, and it is also a key step for structural health monitoring (SHM). This paper proposes a fast feature selection algorithm by efficiently computing the sum of squared canonical correlation coefficients between monitored features and target variables of interest in greedy search. The proposed algorithm is applied to both synthetic and real datasets to illustrate its advantages in terms of computational speed, general classification and regression tasks, as well as damage-sensitive feature selection tasks. Furthermore, the performance of the proposed algorithm is evaluated under varying environmental conditions and on an edge computing device to investigate its applicability in real-world SHM scenarios. The results show that the proposed algorithm can successfully select useful features with extraordinarily fast computational speed, which implies that the proposed algorithm has great potential where features need to be selected and updated online frequently, or where devices have limited computing capability. © 2021, CC BY-NC-ND.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Explicit topology optimization for piezoelectric energy harvester with ensured connectivity of polarization profile

引用

Computers & Structures 2025年 316卷

作者： Weisheng Zhang Qi Lai Jian Zhang State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics International Research Center for Computational Mechanics Dalian University of Technology Dalian 116023 China Key Laboratory of Structural Dynamics of Liaoning Province College of Sciences Northeastern University Shenyang 110819 China School of Mechanical Aerospace and Civil Engineering The University of Sheffield Mappin Street Sheffield S1 4DT UK

This paper proposes an explicit topology optimization approach for simultaneous design of both the structure and polarization profile of piezoelectric energy harvesters (PEHs), with particular emphasis on the connectivity of polarization profile. The approach is established under the Moving Morphable Component (MMC) framework. Two independent sets of MMC components are adopted to simultaneously describe the structural topology of the PEH and the polarization profile of the piezoelectric material. Resorting to the explicit geometry description of MMC, the connectivity of the polarization profile related to PEH manufacturability can be addressed in a straightforward manner using graph theory. A novel connectivity constraint is formulated by considering both connected and disconnected graphs. Meanwhile, the proposed approach is applicable to both subtractive and additive manufacturing strategies under different manufacturing processes. Some numerical examples are provided for cantilever-type PEH. The results demonstrate the effectiveness of the proposed approach in improving energy harvesting efficiency and the connectivity control of the polarization profile for PEH.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Seismic response analysis of high-pier long-span continuous rigid-frame bridges under far-field long-period ground motions

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期638卷

作者： Wang Yanan Tang Guangwu Liu Haiming Liu Yonghui Peng Bin State Key Laboratory of Structural Dynamics of Bridge Engineering Chongqing 400067 China School of Civil Engineering Xi'an Technological University Xi'an 710021 China

The seismic response of a high-pier long-span continuous rigid frame bridge under the action of far-field long-period ground motions is studied. A numerical calculation model of a high-pier long-span continuous rigid frame bridge whose span layout is (95+170+95)m is established by using finite element software. According to the established wave selection criteria, 10 long-period far-field seismic records and 10 ordinary seismic records are selected from the strong earthquake record database. Using the dynamic time history analysis method, the seismic response of the bridge structure under the far-field long-period seismic record and the ordinary seismic record was obtained through calculation, and a comparative analysis was carried out. The results show that the seismic response of a high-pier long-span continuous rigid frame bridge under far-field long-period ground motions is significantly greater than that of ordinary ground motions, the effect of ground motion spectrum characteristics should be considered in seismic design of such bridges.

关键词：

来源：评论

学校读者我要写书评

暂无评论

CO2 seepage behavior in coal under different stress and water content conditions

引用

Quarterly Journal of engineering Geology and Hydrogeology 2025年

作者： Wang, Chongyang Pan, Yisha Zhang, Dongming Liu, Chenxi Xiong, Ziyang State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing400030 China Department of Structural Geotechnical and Building Engineering Politecnico di Torino Turin10010 Italy School of Public Administration China University of Mining and Technology Jiangsu Xuzhou221116 China

Understanding CO₂ seepage behavior in coal beds is crucial for effective geological CO₂ storage. This study explores CO₂ seepage characteristics in coal samples under varying stress conditions (axial, confining, and gas pressures) and water content through laboratory tests, theoretical analysis, and mathematical modeling. Increasing axial and confining pressures compresses the original pores and cracks in the coal, leading to a gradual reduction in CO₂ seepage. At low gas pressures values, the slip effect impacts permeability;however, as gas pressures increases from 3 to 4 MPa, the higher pressure reduces this effect, increasing CO₂ permeability by approximately 300%. Water content also significantly influences permeability, with dry samples showing the highest and water-saturated samples the lowest permeability. The direction of confining pressure, perpendicular to the seepage flow, more effectively obstructs gas seepage channels, making confining pressure the most strongly correlated factor with seepage discharge (correlation coefficient of 0.72). Based on the regression fitting and neural network analysis of experimental data, a permeability model (R²=0.92) was developed, providing accurate predictions of CO₂ seepage behavior in coal under various conditions and serving as a valuable numerical reference for similar studies. © 2025 The Author(s). Published by The Geological Society of London. All rights, including for text and data mining (TDM), artificial intelligence (AI) training, and similar technologies, are reserved. For permissions: https://***/publishing-hub/permissions-policy. Publishing disclaimer: https://***/publishing-hub/publishing-ethics.

关键词： Hydrocarbon seepage

来源：评论

学校读者我要写书评

暂无评论

Revisiting aerodynamic admittance functions of bridge decks

引用

Journal of Zhejiang University-Science A(Applied Physics & engineering) 2020年第7期21卷 535-552页

作者： Lin ZHAO Xi XIE Teng WU Shao-peng LI Zhi-peng LI Yao-jun GE Ahsan KAREEM State Key Laboratory of Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China Key Laboratory of Transport Industry of Wind Resistant Technology for Bridge Structures Tongji UniversityShanghai 200092China Department of Civil Structural and Environmental EngineeringUniversity at BuffaloBuffaloNY 14260USA School of Civil Engineering Central South UniversityChangsha 410000China Department of Civil&Environmental Engineering&Earth Sciences University of Notre DameNotre DameIN 46556USA

A framework was proposed to identify a comprehensive set of aerodynamic admittance functions for bridge decks. The contributions of the cross-spectra between longitudinal and vertical wind velocity components and between turbulence components and gust-induced forces were embedded in the identification procedure. To facilitate application of the identified functions in engineering practice, the concept of an equivalent aerodynamic admittance function was introduced and numerically validated. The equivalent aerodynamic admittance functions of a set of streamlined and bluff cross sections were identified experimentally in a wind tunnel. Buffeting analysis of a bridge deck was carried out and the response predicted using the identified aerodynamic admittance functions compared well with the measured response. In addition, a sensitivity analysis was performed to delineate the influence of aerodynamic and structural parameters on the buffeting response, thereby demonstrating the significance of the proposed identification framework.

关键词： Aerodynamic admittance function bridge deck Buffeting analysis Wind tunnel test Sensitivity analysis

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “Effect of chemical environment on copper tailings reinforced by microbially induced carbonate precipitation” [Construct. Build. Mater. 400 (2023) 132894]

引用

Construction and Building Materials 2023年 401卷

作者： Ting Lu Zuoan Wei M. Hesham El Naggar Wensong Wang Yonghao Yang Xi Tian Hongwei Guo State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400044 China Department of Civil and Environmental Engineering Western University London Ontario N6A 5B9 Canada School of Resources and Safety Engineering Chongqing University Chongqing 400044 China State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiao Tong University Chongqing 400074 China

来源：评论

学校读者我要写书评

暂无评论

Three dimensional finite element analysis on the failure process of a reinforced concrete arch structure by damage theory

Three dimensional finite element analysis on the failure pro...

引用

International Conference on Applications and Techniques in Cyber Intelligence, ATCI 2018

作者： Xiong, Shaohui Tang, Xuesong China Merchants Chongqing Communications Research and Design Institute Co. Ltd. State Key Laboratory of Bridge Engineering Structural Dynamics 33 Xuefu Avenue Nan’an District Chongqing400067 China School of Civil Engineering and Architecture Changsha University of Science and Technology ChangshaHunan410114 China

ISBN: (纸本)9783319987750

A damage constitutive model with 3 independent parameters is derived from the two-order form of the general theory for elastic damage problems. Based on this damage constitutive model and by using damage mechanics – additional load – finite element method, a three dimensional finite element analysis computer program is established. The damaging process and failure of a reinforced concrete arch structure which was removed from a real old bridge is simulated numerically. The damage parameters of concrete are determined through a targeting calculation process. The values of element damage and the nodal displacements along three directions under different load level are obtained. The theoretical results of the failure mode, displacements are in good agreement with the experimental observations. Numerical results reveal the complicated behavior of concrete in a damaging process. The reinforced concrete structures exhibit pronounced nonlinearity at large loading levels. © Springer Nature Switzerland AG 2019.

关键词： Reinforced concrete

来源：评论

学校读者我要写书评

暂无评论

Artificial Ground Motion Simulation with Multi Control Points and Automatic Recognition in Iterative Process

引用

IOP Conference Series: Earth and Environmental Science 2021年第1期638卷

作者： Haoyu Xie Wanshan Zheng State Key Laboratory of Bridge Engineering Structural Dynamics Chongqing 400067 China CMCT Research & Design Institute Co. LTD Chongqing 400067 China School of Civil Engineering Chongqing University Chongqing 400045 China

Artificial ground motion simulation with target response spectrum being compatible is a significant challenge for structural seismic design. In the presented scheme, two major modifications are implied on conventional frequency domain methodology as to realize automatic recognition of stubborn points in iterative process and eliminate them by handling multiple control points in frequency domain. The proposed methodology is evaluated by numerical simulation with the target response spectrum from Chinese Specification for Seismic Design of Highway bridges compared with conventional Stochastic Method. The result shows that the presented scheme enables to recognize stubborn points and eliminate them in iterative process as it is designed, and the fitting accuracy is improved considerably. The scheme is verified reliable to generate input ground motion candidates as a reference for engineers to conduct seismic dynamic analysis.

关键词：

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：