带分布阻尼的受弯构件性能研究

Study on the Performance of Flexural Members with Distributed Damping

目的研究一种采用分布式低屈服点耗能元件的受弯构件的抗震性能,并比较带分布阻尼元件的受弯构件与普通受弯构件的受力性能和滞回耗能性能.方法采用构件层面的阻尼减震技术理论,通过ABAQUS软件建立带分布阻尼材料的RC悬臂梁有限元模拟分析;研究RC悬臂梁与阻尼材料接触面相对变形使得屈服点材料屈服后消耗能量的情况,总结其在附加分布式阻尼后的变形性能和滞回耗能性能.结果分布式低屈服点耗能材料对受弯构件受拉区混凝土的变形起到了明显的抑制作用,低屈服点阻尼材料屈服时将实现部分能量的耗散.结论分布阻尼对受弯构件的受力和滞回性能具有改善作用,混凝土构件损伤情况得到改善,滞回耗能性能有所提高.

In order to study the seismic performance of the flexural member with low yield point distributed damping element,and to compare the mechanical performance and the hysteretic energy dissipation performance of the distributed damping flexural member with the normal flexural member,a finite element analysis was carried out to a cantilever beam with distributed low yield point energy dissipation material based on the theory of shock absorption technology at component level in this paper.The finite element analysis model is established by ABAQUS software to simulate the energy consumption after the damping material yield due from the relative deformation of the contact surface between RC beam and damping layers.The deformation performance and hysteretic energy dissipation was summarized and compared with those ordinary cantilever beams.According to the results of the finite element analysis,it was found that the distributed low yield point energy dissipating material can obviously restrain the deformation of the concrete in the tensile zone of the flexural member,and the energy dissipation will be realized when the low yield point plate yield is yielded.Therefore,it can be considered that the distribution damping can improve the stress and hysteresis performance of the flexural members through reasonable design.After distribution damping,the damage of the component and the hysteretic energy dissipation performance is improved.