墙趾可更换金属阻尼器力学性能及恢复力模型研究  

Study on mechanical performance and restoring force model of wall-toe replaceable metal dampers

作　　者：王威[1] 周强 权超超 李昱 王小飞 续鉴 WANG Wei;ZHOU Qiang;QUAN Chaochao;LI Yu;WANG Xiaofei;XU Jian(School of Civil Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑结构学报》2024年第10期243-254,共12页Journal of Building Structures

基　　金：国家自然科学基金面上项目(52278214,52378314);陕西省自然科学基础研究计划重点基金(2022JZ-21);土木工程防灾减灾全国重点实验室开放基金(SLDRCE23-06)。

摘　　要：为减轻剪力墙墙趾处的局部损伤,开发了一种墙趾可更换金属阻尼器。为研究该阻尼器不同波形耗能板厚度、约束板厚度、波形耗能板宽高比对其力学性能的影响,开展了7个阻尼器试件的拟静力加载试验。研究表明:7个阻尼器试件的滞回曲线稳定且饱满,具有良好的延性和耗能能力;3种设计参数对阻尼器承载能力和耗能性能的影响程度由大到小依次为:波形耗能板厚度、波形耗能板宽高比、约束板厚度。通过理论推导和试验拟合标定了该阻尼器的骨架模型,并结合可考虑基本强度退化、峰值后强度退化以及刚度退化的滞回规则,建立了阻尼器的恢复力模型,该恢复力模型计算结果与试验结果吻合较好。进一步基于该恢复力模型建立了阻尼器的数值模型,该数值模型可较为精准地模拟阻尼器的承载能力与耗能性能。通过对包含该阻尼器的组合剪力墙进行数值模拟,验证了阻尼器数值模型具有良好的适用性。To mitigate localized damage at the toe of shear walls,a wall-toe replaceable metal damper was developed.To investigate the effects of thickness of corrugated energy dissipation plate,thickness of restraint plate,and width-to-height ratio of corrugated energy dissipation plate on the mechanical properties of the damper,static loading tests of seven damper specimens were implemented.The study shows that the hysteresis curves of the seven damper specimens are stable and full,with good ductility and energy dissipation capacity.The influence degree of the three design parameters on the load-carrying capacity and energy dissipation performance of the damper from large to small is,the thickness of the corrugated energy dissipation plate,the width-to-height ratio of the corrugated energy dissipation plate,and the thickness of the restraint plate.The skeleton model of the damper was calibrated through theoretical derivation and experimental fitting,and the restoring force model of the damper was established by combining with the hysteresis rule,which can consider the basic strength degradation,strength degradation after peak load and stiffness degradation,and the calculated results of the restoring force model are in good agreement with the experimental results.A numerical model of the damper was further established based on the restoring force model,which can accurately simulate the load-carrying capacity and energy dissipation performance of the damper.Through a numerical simulation of the composite shear wall containing the proposed damper,it is verified that the numerical model of the damper has good applicability.

关 键 词：墙趾可更换金属阻尼器 波形耗能板 恢复力模型 力学性能 数值模型 

分 类 号：TU398.2[建筑科学—结构工程] TU352.1