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Erratum to: Experimental Investigation on the Fatigue Behaviour of Heat-Treated Tubular T-Joints

KSCE Journal of Civil Engineering 2018年第7期22卷 2651-2651页

作者： Hazem Samih Mohamed Fei Gao Xing-Quan Guan Hong Ping Zhu School of Civil Engineering and Mechanics Huazhong University of Science and Technology 430074 Wuhan Hubei PR China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology 430074 Wuhan Hubei PR China

This erratum is published to notify corrections in authors’ name. Please take note that changes have been made to authors, Gao Fei**, Guan Xing-Quan***, Zhu Hong Ping****. See the corrected version below: Errata: The original version of this article: Hazem Samih Mohamed*, Gao Fei**, Guan Xing-Quan***, Zhu Hong Ping**** Was altered as: Hazem Samih Mohamed*, Fei Gao**, Xing-Quan Guan***, Hong Ping Zhu**** The original article has been corrected.

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Seismic Fragility Analysis of RC Isolated Continuous Girder Bridge Using Radial Basis Function Neural Network

Seismic Fragility Analysis of RC Isolated Continuous Girder ...

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The 2014 International Conference on Materials Science and Engineering Technology(MSET 2014)

作者： Bei Lei Chen Xiao Hong Long Jian Jun Li School of Civil Engineering & Mechanics HuaZhong University of Sci.& Technology Hubei Key Laboratory of Control Structure HuaZhong University of Science & Technology China Railway Siyuan Survey and Design Group Co.Ltd.

ISBN: (纸本)9783038351023

To approximate the correlating mathematical relationship between many earthquake records’ PGA and the responses of bridge structures with minimum efforts and without loss of accuracy, an artificial neural network-based method is proposed in combination with LHS and IDA methodThis method is employed to conduct the seismic fragility analysis of RC isolated continuous girder bridgeTo investigate the suitability of this approach, the results of the new approach are compared to those obtained by the Cloud methodThe comparison shows that the new method is more efficient and reliable.

关键词： RBFNN IDA isolated continuous girder bridge fragility analysis

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Seismic response of LRB base-isolated structures under near-fault pulse-like ground motions considering potential pounding

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Gongcheng Lixue/Engineering Mechanics 2010年第SUPPL. 2期27卷 298-302页

作者： Fu, Rong Ye, Kun Li, Li Wenhua College Huazhong University of Science and Technology Wuhan 430074 China College of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China

Under near-fault pulse-like ground motions, potential pounding may occur at the isolation level between the base-isolated building and its surrounding retaining walls. In this paper, the effect of pounding on the dynamic responses of base-isolated buildings is explored by using the modified Kelvin impact model and taking the inelasticity of the superstructure into account. It is shown from numerical results that floor accelerations at the time of pounding is substantially higher than those of the building without base-isolation, and the displacement time history of the drift at the ground floor takes the staircase-like form due to the presence of high spikes in the pounding force and the significant residual inter-story deformation. This indicates that higher ductility should be imposed on lower floors of the superstructure with base-isolation than the building without base-isolation, otherwise, the global collapse of the superstructure may be induced. Higher modes of vibration are excited during the pounding, which results in larger inter-story drifts.

关键词： Ductility

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Mechanical analysis of the asphalt pavement on orthotropic steel bridge deck

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2008年第2期30卷 90-93页

作者： Zi, Jian-Min Lu, Qing-Chang Huang, Xian-Shun Jiang, Tao School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China Hainan Highway Survey and Design Institute Haikou 570206 China Hubei City Planning Design and Research Institute Wuhan 430071 China

The basis theory and hypothesis of finite element method (FEM) computing for steel bridges deck surfacing were proposed. According to the general parameters of steel-box joist deck and surfacing structure of long-span steel bridges in China, the relations between each mechanical index and the elastic modulus of asphalt mixture surfacing materials and the most disadvantaged loading position were analyzed, the most dangerous points were also confirmed which were used as control targets in structure design. In the way, the early damage of the deck surfacing could be controlled.

关键词： Asphalt mixture Deck surfacing Stress-strain relationship Surfacing orthotropic steel plate

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Active Pendulation control of Hoisting Systems of Ship-Mounted Cranes Under Ocean Wave Excitations: Principles and Experimental Study

SSRN

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SSRN 2024年

作者： Zhang, Yongtao Shen, Wenai Long, Zhentao Zhang, Yipeng Wang, Zicao Zhang, Zhaokun Zhu, Songye Stocchino, Alessandro Deng, Huaxia Zhu, Hongping School of Civil and Hydraulic Engineering Huazhong University of Science and Technology Wuhan430074 China CCCC Second Harbor Engineering Company Ltd. Wuhan430040 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan430074 China Department of Civil and Environmental Engineering The Hong Kong Polytechnic University Hong Kong Department of Modern Mechanics University of Science and Technology of China Hefei230026 China

Large-scale ship-mounted cranes are important facilities for marine construction. However, under harsh sea conditions, the hoisting system of a ship-mounted crane is often subjected to wave loadings, leading to frequent occurrences of large-amplitude resonance. This paper proposes an active control method, termed the active displacement compensation (ADC) approach, designed for suppressing the large-amplitude pendulation of the hoisting system of ship-mounted cranes. By controlling the position of the suspension point of the hoisting system using linear-motion actuators, the input excitations of the hoisting system induced by the ship motions can be partially or fully compensated in real-time. Therefore, the proposed ADC approach can significantly suppress the large-amplitude pendulation of the hoisting system. The optimal feedback gain and time delay of the ADC approach are theoretically obtained. The ADC approach has been validated by using a six-degree-of-freedoms shaking table test and numerical simulation on the in-plane pendulation suppression of a small-scale hoisting system. Experimental results indicate that the ADC approach achieves a pendulation reduction ratio between 85% and 89% for the hoisting system subjected to scaled ship motion records. This study may help develop efficient active control techniques for hoisting systems of ship-mounted cranes under harsh sea conditions. © 2024, The Authors. All rights reserved.

关键词： Water waves

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Simulation and analysis of foundation excavation and support

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Yantu Lixue/Rock and Soil Mechanics 2007年第SUPPL.期28卷 669-672页

作者： Hu, Hao-Jun Wang, Yuan-Han School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China Survey and Design Institute Beijing Military Region Air Force Beijing 100022 China

The simulative analysis with the Mohr-Coulomb model of FLAC3D program is carried out based on the development of deformation for foundation pits of a high-rise building in Beijing. Comparing with the results of the in-situ monitoring, the deformation, collapse and support for the foundation pits are discussed. It can be shown that the Mohr-Coulomb model of the FLAC3D program can be used to simulate the foundation excavation and the collapse and the slope support very conveniently and accurately. The results obtained are safe and reliable. The FLAC3D program can be widely used in the simulation of foundation pits.

关键词： Foundations

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Experimental study on dynamic behavior of full-prestressed concrete beams

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Gongcheng Lixue/Engineering Mechanics 2008年第SUPPL.期25卷 71-75页

作者： Zhang, Yao-Ting Li, Hong-Jian School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China Shenzhen Branch Court Guangdong Urban and Rural Planning and Design Institute Shenzhen 518040 China

The dynamic test of two full-prestressed concrete beams was carried out. The test results indicate that frequencies of those beams grow in step with the prestressing force. It's opposite to the analysis of dynamic characteristic of isotropic material beams subjected to axial compressive force. There are many factors for this result. This paper discusses the change of the elastic modulus results in the stiffness change, which then changes the frequencies. A modified formula was proposed, and the comparison of calculation results was taken. The results indicate that the method of this paper has a good applicability, the experimental results agree well with the theoretical analysis.

关键词： Prestressed concrete

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Experiments of Multi-element Composite Foundation with Steel Pipe Pile and Gravel Pile

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Journal of Modern Transportation 2008年第3期000卷

作者： WANG Xian-zhi ZHENG Jun-jie School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China

A set of self-developed apparatus for foundation physical model were utilized to conduct model tests of the multi-element composite foundation with a steel pipe pile and several gravel piles. Some load-bearing characteristics of the multi-element composite foundation, including the curves of foundation settlement, stresses of piles, pile-soil stress ratio, and load-sharing ratio of piles and soil, were obtained to study its working performances in silty sand soil. The experimental results revealed that the multi-element composite foundation with steel pipe pile and gravel pile contributed more than the gravel pile composite foundation in improving the bearing capacity of the silty fine sand.

关键词： Steel pipe pile Gravel pile Model test Multi-element composite foundation Pile-soil stress ratio Load-sharing ratio

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Seismic Responses of Asymmetric Base-Isolated structures under Near-Fault Ground Motion

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Journal of Modern Transportation 2008年第4期000卷

作者： YE Kun LI Li FANG Qin-han School of Civil Engineering and Mechanics Huazhong University of Science and Technology Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong University of Science and Technology Wuhan 430074 China

An inter-story shear model of asymmetric base-isolated structures incorporating deformation of each isolation bearing was built, and a method to simultaneously simulate bi-directional near-fault and far-field ground motions was proposed. A comparative study on the dynamic responses of asymmetric base-isolated structures under near-fault and far-field ground motions were conducted to investigate the effects of eccentricity in the isolation system and in the superstructures, the ratio of the uncoupled torsional to lateral frequency of the superstructure and the pulse period of near-fault ground motions on the nonlinear seismic response of asymmetric base-isolated structures. Numerical results show that eccentricity in the isolation system makes asymmetric base-isolated structure more sensitive to near-fault ground motions, and the pulse period of near-fault ground motions plays an import role in governing the seismic responses of asymmetric base-isolated structures.

关键词： Asymmetric base-isolated structure Near-fault ground motion Far-field ground motion Nonlinear seismic response

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Ultimate bearing capacity of RC rectangular slab considering membrane effect

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of Technology 2007年第6期29卷 58-61页

作者： Zhang, Xian-Jin Li, Yong-Chun Lu, Man-Man School of Civil Engineering and Mechanics Huazhong Univ. of Sci. and Technol. Wuhan 430074 China Hubei Key Laboratory of Control Structure Huazhong Univ. of Sci. and Technol. Wuhan 430074 China Department of Civil Engineering Beihang University Beijing 100083 China

Based on plastic yield line theory the failure model of horizontal restrained rectangular slab was given. By applying principle of virtual work, the formula of horizontal restrained rectangular slab for calculation of limit bearing capacity was derived. The average compression zone height needed to be determined. By nonlinear regression of the results with MATLAB, the formula of compression zone depth could be obtained. Comparative analysis showed that the formula was in good agreement with experimental values.

关键词： Finite element analysis Membrane effect Plastic yield line theory Rectangular slab Ultimate bearing capacity

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