连梁低屈服点钢剪切型阻尼器力学性能研究

STUDY ON THE MECHANICAL PROPERTIES OF STEEL SHEAR DAMPER WITH LOW YIELD POINT FOR CONNECTING BEAM

连梁低屈服点钢剪切型阻尼器实际处于多种荷载组合作用下,针对连梁低屈服点钢剪切型阻尼器只考虑了剪力的现象,通过ABAQUS对阻尼器施加纯剪切作用、轴向–剪切作用、弯矩–剪切作用,改变阻尼器材料,将公式推导与有限元模拟相结合,研究轴力、弯矩对阻尼器力学性能的影响。研究结果表明:轴力会使阻尼器提前进入屈服,对阻尼器耗能能力影响较小;弯矩的存在会降低阻尼器的屈服荷载、极限荷载,增强阻尼器的耗能能力;材料改变对阻尼器力学性能影响不显著。

A steel shear damper with a low yield point for a connecting beam is subjected to various load combinations,but only the shear force is taken into account.The influence of the axial force and bending moment on the mechanical properties of dampers was studied by applying the shear,axial-shear and bending moment-shear forces through ABAQUS,changing damper materials and combining the formula deduction with finite element simulation.According to the research results:dampers are yielded in advance under axial forces,which has little influence on the energy consumption of dampers;the bending moment will reduce the yield load and ultimate load of dampers and increase the energy consumption of dampers;and changes in materials have no significant impact on the mechanical properties of dampers.