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ANALYSIS OF DYNAMICAL buckling AND post buckling FOR BEAMS BY FINITE SEGMENT METHOD

Applied Mathematics and Mechanics(English Edition) 2005年第9期26卷 1181-1187页

作者：殷学纲杜思义胡继云丁剑平 Department of Engineering Mechanics Chongqing University Chongqing 400030 P.R.China School of Civil Engineering Zhengzhou University Zhengzhou 450002 P.R.China School of Mechanical and Electrical Engineering Henan Institute of Technology Zhengzhou 450002 P.R.China School of Civil Engineering and Architecture Chongqing University of Science and Technology Chongqing 400042 P.R.China

Based on the multi-rigid body discretization model, namely, finite segment model,a chain multi-rigid-body-hinge-spring system model of a beam was presented, then a nonlinear parametrically exacted vibration equation of multi-degrees of freedom system was established using the coordination transformation method, and its resonance fields were derived by the restriction parameter method, that is, the dynamical buckling analysis of the beam. Because the deformation of a beam is not restricted by the discrete model and dynamic equation, the post buckling analysis can be done in above math model. The numerical solutions of a few examples were obtained by direct integrated method, which shows that the mechanical and math model gotten is correct.

关键词： beam finite segment method dynamic buckling parametrically exacted vibration post buckling

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Effect of fiber angle on LYP steel shear walls behavior

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Journal of Central South University 2014年第2期21卷 768-774页

作者： Farzad Hatami Ali Ghamari Farshad Hatami Structure and Earthquake Center Amirkabir University of Technology Researcher of Civil Engineering Azad UniversityDareshahr Branch Civil Engineering Department Amirkabir University of Technology

Steel shear wall(SSW) was properly determined using numerical and experimental *** properties of SSW and LYP(low yield point) steel shear wall(LSSW) were *** is revealed that LSSW exhibits higher properties compared to SSW in both elastic and inelastic *** is also concluded that the addition of CFRP(carbon fiber reinforced polymers) enhances the seismic parameters of LSSW(stiffness,energy absorption,shear capacity,over strength values).Also,stress values applied to boundary frames are lower due to post buckling *** effect of fiber angle was also studied and presented as a mathematical equation.

关键词： carbon fiber reinforced polymers fiber angle low yield point steel shear wall post buckling composite

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