Parameter Analysis of a New Type of Self-centering Energy Dissipative Seismic Supports and Hangers
In order to solve the problem that the traditional seismic supports and hangers adopt the"hard resistance"method to resist the earthquake action and reduce the residual deformation of the traditional seismic supports and hangers after the earthquake,a new type of self-centering energy dissipative seismic supports and hangers(SESH)is proposed in this paper.The finite element software ABAQUS is used to simulate the SESH and the traditional seismic supports and hangers.The stress and deformation characteristics and hysteretic performance of the two kinds of supports and hangers are compared and analyzed,so as to verify the seismic performance of the proposed SESH.Supports and hangers models with different parameters are established.By analyzing hysteretic performance parameters,the influence laws of seismic inclined brace reset ratio,stiffness ratio and friction coefficient on hysteretic performance of SESH were obtained,and the value suggestions of the above parameters were given.The peak response acceleration of the supports and hangers is taken as the engineering demand parameter,and the failure state of the supports and hangers is taken as the damage limit state.The vulnerability curves of two kinds of seismic supports and hangers are obtained.The results show that the SESH have good hysteretic characteristics when the seismic inclined brace reset ratio,stiffness ratio and friction coefficient are 1.0～1.5,1.0～1.5 and 0.1～0.3,respectively.The new SESH has stronger robustness and can better ensure the function of pipeline system.
self-centering energy dissipative seismic supports and hangers(SESH)finite element simulationparameter analysishysteretic performancefragility analysis
万方数据
维普
