钢框架带竖缝钢板剪力墙系统的塑性耗能评估

Plastic energy based Seismic Assessment of Steel Frame Steel Shear Wall with Slits

摘要:

从耗能视角出发，提出了结构基于塑性耗能的抗震性能评估方法.结合理论推导和有限元数值方法建立了以弯曲小柱作为耗能子单元的带竖缝钢板剪力墙（SSWS）塑性耗能计算方法.基于钢框架及SSWS的协同耗能机制，提出了考虑地震动力特性的损伤指标.通过有限元参数分析、既有的试验结果的校验及钢框架带竖缝钢板剪力墙结构算例非线性时程分析，证明SSWS塑性耗能计算方法及结构体系评估方法有良好精度，可用以评估结构在给定地震动下的行为.

Abstract:

In view of energy dissipation, the plastic energy based seismic assessment method of system is established. A calculation method of plastic energy dissipation of steel shear wall with slits (SSWS) is established by theoretical and finite element analysis, in which the flexural links are regarded as the basic energy dissipative components of SSWS. Based on the synergetic energy dissipative mechanism, an assessment method with the damage index considering property of ground motions is proposed. The theory is confirmed by the finite element parametric analysis, experimental results and the structural nonlinear dynamic analysis. Results indicate that the proposed calculation approach in consideration of the plastic energy of SSWS and the assessment method exhibits satisfying accuracy and it can be used to estimate the seismic behavior under given ground motion, demonstrating its rationality.