含减震外挂墙板的装配式框架结构协同抗震性能研究

针对提出的一种围护-主体协同减震装配式结构新体系，即含减震外挂墙板的装配式框架结构，开展了抗震性能研究。基于试验提出了适用于该类结构的多尺度数值模拟方法；通过一栋RC框架结构明确了该类结构的协同减震机理；基于28个案例揭示了刚度比和屈服力比对其减震机理的影响规律。结果表明:多尺度数值模拟方法可较好模拟该类结构的损伤演化模式和受力特征；减震外挂墙板中所配置的U型阻尼器可先于主体结构屈服耗能，有效控制结构响应，显著降低梁柱构件损伤程度，但不改变主体结构的损伤演化模式；随着关键设计参数(刚度比和屈服力比)的增大，结构层间位移角减震率和阻尼器耗能占比整体逐渐增大，当关键设计参数达到一定值后，两者趋于稳定。研究成果可为主体和围护协同一体化工作的高性能结构体系研发提供参考。

INVESTIGATION ON THE COLLABORATIVE SEISMIC PERFORMANCE OF PREFABRICATED FRAME STRUCTURES WITH ENERGY DISSIPATING CLADDING PANELS

A novel prefabricated structural system, i.e. the frame structure with energy dissipating cladding panels, was proposed with an emphasis on the collaborative vibration reduction of the cladding panels and the main structure. To investigate the seismic performance of such structures, a multi-scale numerical simulation method was proposed based on a experiment. The collaborative mechanism of the vibration reduction was identified through an RC frame structure. The effects of the stiffness ratio and yield force ratio on such a mechanism were revealed based on 28 study cases. The results indicate that the multi-scale numerical simulation method can reflect the damage evolution mode and mechanical characteristics of such structures, and that the U-shaped dampers in the energy dissipating cladding panels yielded and started to dissipate energy before the main structure did. Therefore, the seismic response of the main structure and the damage to the beams and columns were effectively controlled without changing the damage evolution mode of the structure. With the increase of some critical design parameters (i.e., the stiffness ratio and yield force ratio), the damping effect on the inter-story drift ratio and the energy dissipated by the dampers was gradually increased. When such parameters reached certain values, the damping effect and the energy dissipated by the dampers were stabilized. The research results provided a useful reference for the development of high-performance structural systems with an emphasis on the collaboration of cladding panels and the main structure.