考虑轴向效应的铅芯橡胶支座模型

Lead-Rubber Bearing Model Considering Axial Effect

基于常规的铅芯橡胶支座模型,提出一种考虑轴向效应的新模型.该模型可以实现单向模型与双向模型之间的相互转化.通过对该模型在三向简谐荷载作用下的响应分析,探讨了铅芯橡胶支座考虑轴向效应时的力学性能.结果表明:双向模型的恢复力-位移曲线与单轴时有较大差别;轴向荷载不变时,屈服力随支座剪应变的增大而减小;剪应变不变时,屈服力随轴向荷载的增大而增大.

Based on the conventional lead-rubber bearing models, a new beating model considering the axial effect is presented, which makes it possible to transfer the uniaxial model to the biaxial one. Then, through the response analysis of the proposed model under the triaxial harmonic loading condition, the mechanical performances of the lead-rubber bearing affected by the axial effect are discussed. The results indicate that there is significant difference in the resilience-displacement curves between the biaxial model and the uniaxial one; and that the yield force decreases with the increase of the shear strain under a constant axial load, while it increases with the axial load at a constant shear strain.