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Strain rate effect on transmission tower-line system under earthquake action

2011,Vols(243-249):5845-5848 《Advanced Material Research》

Abstract：Abstract. Using ABAQUS software, three dimensional finite element model of a transmission tower-line system is created. Nonlinear seismic responses under three seismic records with and without strain rate effect are studied. The results show that the strain rate effect on the transmission tower-line system is more obvious with an increase in intensity of the earthquake. The influence of strain rate on the top displacement and base shear of tower under certain seismic records is unneglectable. Also, it is shown that the strain rate effect on the deformation of wire is prominent. The strain rate effect on the axial force of wire is neglectable. This simple study reveals theimportance of considering strain rate effect in seismic analysis for transmission tower-line system. 
Keywords：transmission tower-line system, nonlinear time-history analysis, strain rate effect, earthquake. 

Introduction

Conclusions
In this paper, a fast stochastic analysis method of soil-structure interaction system has been presented. In the new method, the pseudo-excitation method and the classical
modal decomposition is adopted to derivate an iterative sequence, which can exactly account for the non-proportional damping and dynamic interaction between the soil
region and the structure without obviously increasing computational effort. Furthermore,the new method’s accuracy and convergence have been proved by some numerical
examples belonging to two different models of soil-structure interaction system.

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