铅芯直径对铅芯橡胶隔震支座极限剪切性能的影响分析

The Effects of the Lead Core Diameter on the Ultimate Shear Performance of the Lead-Rubber Bearings

通过有限元分析软件ABAQUS对铅芯橡胶隔震支座进行极限剪压状态下的力学性能分析,研究了铅芯直径对铅芯橡胶隔震支座极限剪切位移的影响及其在此极限状态下的等效水平刚度、等效阻尼比、屈服后刚度和屈服力.研究表明,铅芯直径的增大使铅芯橡胶隔震支座的极限剪切位移显著减小;铅芯直径对极限剪压状态下的有效阻尼比和屈服力起决定性影响,二者随铅芯直径的增大而显著增大;铅芯直径对屈服后刚度影响很小.

We analyzed the mechanical properties of the lead-rubber bearings under the ultimate shear pressurestate by the finite element analysis software ABAQUS,and studied the effects of the lead core diameter on theultimate shear displacement of the lead-rubber bearings,equivalent horizontal stiffness,equivalent damping ratio,post- yield stiffness and yield strength. The study found that the increasing of the lead core diameter made asignificant reduction of the ultimate shear displacement;the lead core diameter have a decisive impact on theeffective damping ratio and yield strength under the ultimate shear pressure state,both significantly increasing withlead core diameter increasing;lead core diameter has little effect on the post-yield stiffness.