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Influence of Carbon Fiber Contents on the Temperature Sensibility of CFRC Road Material

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Journal of Wuhan University of Technology(Materials Science) 2002年第3期17卷 75-77页

作者：唐祖全 dept. of Engineering Structure and mechanics Wuhan University of Technology Wuhan China

The relationship between the electrical resistivity of carbon fiber reinforced concrete(CFRC) containing different carbon fiber contents and temperature was *** is found that carbon fiber contents influence greatly on the temperature sensibility of CFRC road *** with a certain amount of carbon fiber can CFRC show a sensitive and stable temperature sensibility.

关键词： carbon fiber reinforced concrete temperature sensibility temperature self diagnosis

MICROMECHANICAL MODELLING OF STRAIN SOFTENING IN MICROCRACK-WEAKENED QUASI-BRITTLE MATERIALS

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Acta Mechanica Solida Sinica 1995年第2期8卷 121-132页

作者： Feng Xiqiao Yu Shouwen(dept.of Engineering mechanics,Tsinghua University,Beijing 100084,P.R.China) dept. of Engineering mechanics Tsinghua University Beijing 100084 China

By using the concept of domain of microcrack growth(DMG),the micromechanisms of damage in quasi-brittle materials subjected to triaxial either tensile or compressive loading are investigated and the complete strew-strain relation including four stages is obtained from micromechanical *** regime of pre-peak nonlinear hardening corresponds to the distributed damage,*** stable propagation of *** the attainment of the ultimate strength of load-bearing capacity, some microcracks experience the second unstable growth and the distributed damage is transmitted to the localization of *** analyses improve our understanding of the hardening and softening behaviors of quasi-brittle materials.

关键词： microcracks strain softening constitutive relation micromechanical damage mechanics brittle material

Anti-impact and energy-absorption of metal and compound thin-wall cylindrical tubes

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Journal of Harbin Institute of Technology(New Series) 2008年第3期15卷 317-320页

作者：陈永涛申智春郑钢铁 dept. of Astronautic Engineering and mechanics Harbin Institute of Technology

The paper presents an energy iterative method to determine the second critical velocity by comparing the time histories of the kinetic energy and the buckling deformation based on the finite element model of the impact system. To design anti-impact structures of the thin-wall cylindrical tubes with this new method, the cost of the experiment can be considerably reduced. The feasibility and validity of this method are demonstrated by a dropping hammer experiment. In addition, this paper deals with the influence of constrained damping layers on the anti-impact capability and energy-absorption of thin-wall cylindrical tubes. Results show that the constrained damping layers make the energy-absorption and the anti-impact capability increased comparing with the naked tubes; the thickness of the damping layer should be restricted in a range, or else the anti-impact capability will decrease with the increase of the damping layer thickness; for the constrained layer, the anti-impact capability will increase with the augment of its thickness.

关键词： cylindrical tube buckling critical velocity constrained damping layer

Book Review of “Fluvial Hydrodynamics:Hydrodynamic and Sediment Transport Phenomena”,*** Verlag,687 pages,ISBN 978-3-642-19061-2,by Subhasish Dey.

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International Journal of Sediment Research 2015年第1期30卷 90-91页

作者： Zhao-yin WANG Hong-wei FANG dept.of Hydraulic Engineering the State Key Laboratory of Hydroscience and EngineeringTsinghua University

The author,Prof Subhasish Dey,presents an up-to-date and comprehensive consideration of hydrodynamic principles to analyze sediment transport *** author is well known in the field of applied hydrodynamics and sediment transport,with wide experience in theoretical and applied *** book is intended for postgraduate and research students,who already have a decent knowledge and understanding of fluid mechanics,as well as for model developers and users of theoretical models in the fluvial hydrodynamics *** author's intention is to introduce the readers to the mechanics and physics of sediment transport by turbulent flow,

关键词： Book Review of Springer Verlag,687 pages,ISBN 978-3-642-19061-2,by Subhasish Dey Fluvial Hydrodynamics

AN ADAPTIVE OPEN BOUNDARY CONDITION

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Acta Mechanica Sinica 1990年第4期6卷 305-310页

作者： Chen Yaosong Zou Guangyuan (dept.of mechanics,Peking University)Gong Jie (Inst.of Software,Academia Sinica) dept. of mechanics Peking University Beijing China

A significant improvement of the open boundary condition which was originally studied by Engquist and Majda is *** method given here is applicable without limitation of the angle between the direction of the incident wave and the normal to the *** also improves the precision of the method from order one to *** test examples show that this method is much better than the method mentioned above.

关键词： boundary condition open boundary condition radiation condition

Application of clan member signal method in structural damage detection

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Earthquake Engineering and Engineering Vibration 2007年第1期6卷 29-34页

作者：郭迅 B.F.Spencer 卢书楠 Institute of Engineering mechanics China Earthquake Administration dept.of Civil and Environmental Engineering University of Illinois at Urbana-Champaign

It is well known that in most cases, a reference is necessary for structural health diagnosis, and it is very difficult to obtain such a reference for a given structure. In this paper, a clan member signal method （CMSM） is proposed for use in structures consisting of groups （or clans） that have the same geometry, i.e., the same cross section and length, and identical boundary conditions. It is expected that signals measured on any undamaged member in a clan after an event could be used as a reference for any other members in the clan. To verify the applicability of the proposed method, a steel truss model is tested and the results show that the CMSM is very effective in detecting local damage in structures composed of identical slender members.

关键词： damage detection health monitoring vibration based clan member signal method local damage

UNITIVE ANALYSIS SCHEMES ON PROBLEMS OF MULTIPLE MOVING BOUNDARIES WITH 3-D LIQUID-SOLID MULTIPLE NONLINEAR COUPLING FOR UPLIFT OF ANCHOREDLIQUID STORAGE TANKS

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Applied Mathematics and mechanics(English Edition) 1997年第1期18卷 69-79页

作者：温德超郑兆昌 dept. of Engineering mechanics Qinghua University Beijing P. R. China

In the paper, 3-D analysis method with unitive schemes is set up, which is used to resolve the uplift with multiple moving boundaries and multiple nonlinear coupling for anchored liquid storage tanks. hi it, an algorithm of quasi-harmonious finite elements for arbitrary quadrilateral of thin plates and shells is built up to analyze the multiple coupling problems of general thin plates and shells structures with three dimensions, the complementary equations for analyzing uplifting moving boundary problems are deduced. The axial symmetry and presumption of beam type mode are not used. In it, an algorithm is put forward for analyzing the Navier-Stokes problems of unsteady, three-dimensional, and viscous liquid with sloshing of moving boundary surfaces in large amplitude under ALE frame by scheme of time-split-steps to which linear potential theory is not applied. The algorithms can be used to analyze the solid-liquid multiple nonlinear coupling problems with 3-D moving boundary with friction in multiple places.

关键词： solid-liquid coupling multiple nonlinear coupling moving boundary liquid storage tank uplift time-split-steps ALE method

COMPLEX FUNDAMENTAL SOLUTIONS FOR SEMI-INFINITEPLANE AND INFINITE PLANE WITH HOLE UNDER VARIOUS BOUNDARY CONDITIONS

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Applied Mathematics and mechanics(English Edition) 1998年第4期19卷 335-344页

作者：唐寿高曹志远 dept. of Eng. mechanics and Technol. Tongji University Shanghai 200092 China

A general method of finding the complex fundamental solutions for semi-infinite plane and infinite plane with hole under various boundary conditions has be established by using Riemann-Schwarz symmetric principle and ... 详细信息

关键词： fundamental solution Riemann-Schwarz symmetric principle superposition principle

Seismic response of continuous span bridges through fiber-based finite element analysis

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Earthquake Engineering and Engineering Vibration 2006年第1期5卷 119-131页

作者： Chiara Casarotti Rui Pinho University of Pavia Structural Mechanics Dept. Via Ferrata 1 27100 Pavia Italy

It is widely recognized that nonlinear time-history analysis constitutes the most accurate way to simulate the response of structures subjected to strong levels of seismic excitation. This analytical method is based on sound underlying principles and has the capability to reproduce the intrinsic inelastic dynamic behavior of structures. Nonetheless, comparisons with experimental results from large-scale testing of structures are still needed, in order to ensure adequate levels of confidence in this numerical methodology. The fiber modelling approach employed in the current endeavor inherently accounts for geometric nonlinearities and material inelasticity, without a need for calibration of plastic hinges mechanisms, typical in concentrated plasticity models. The resulting combination of analysis accuracy and modelling simplicity, allows thus to overcome the perhaps not fully justifiable sense of complexity associated to nonlinear dynamic analysis. The fiber-based modelling approach is employed in the framework of a finite element program downloaded from the Intemet for seismic response analysis of framed structures. The reliability and accuracy of the program are demonstrated by numerically reproducing pseudo-dynamic tests on a four span continuous deck concrete bridge. Modelling assumptions are discussed, together with their implications on numerical results of the nonlinear time-history analyses, which were found to be in good agreement with experimental results.

关键词： bridges seismic response pseudo-dynamic testing nonlinear dynamic analysis fiber modelling