摘要
为揭示半刚性钢管混凝土组合框架在地震作用下的动力特性和破坏形式,对2榀两层单跨钢管混凝土柱与组合梁单边螺栓端板连接组合框架进行拟动力试验研究。该试件的梁柱连接节点形式为平齐端板或外伸端板连接,组合楼板采用钢筋桁架楼承板,试验影响参数为柱截面类型和端板类型。研究了El-Centro地震波作用下结构的加速度反应和位移响应,分析了滞回性能、刚度、延性和耗能能力等,评价了梁柱半刚性连接和楼板组合效应对组合框架结构整体性能的影响。试验表明:半刚性钢管混凝土组合框架具有良好的抗震性能和耗能特性。在柱截面宽度和含钢率相同条件下,采用单边高强螺栓端板连接方式,圆钢管混凝土组合框架的最大位移响应和累积耗能比方钢管混凝土组合框架大;方钢管混凝土组合框架的水平承载力和初始刚度优于圆钢管混凝土组合框架。研究成果将为我国装配式组合结构设计理论与应用提供科学依据。
In order to investigate the dynamic behavior and failure mechanism of semi-rigid CFST composite frames under seismic loading, two-layer one-span specimens of semi-rigid CFST frames with composite beams were tested under pseudo-dynamic actions. The flush or extended end plates were employed to form the beam-column connections and the composite floor slab is made of rebar truss embedded in concrete slab. The test parameters are cross-section type of column and end plate type. The whole loading progress and failure modes of two specimens under E1 Centro earthquake waves were studied. Dynamic responses, including displacement, acceleration, hysteretic curves, degradation curves of stiffness and ductility as well as energy dissipation capacity, were also analyzed. The influence of semi-rigid connection and floor slab composite effect on the performance of overall frame were evaluated. The test results show that the semi- rigid CFST frames with composite beams have good seismic behavior and energy dissipation capacity. Under the same width and steel ratio of column cross-section, the maximum displacement response and accumulated energy dissipation of circular CFST frame were higher than those of square CFST frame, while the rule was opposite for horizontal bearing capacity and initial rigidity. The research results may provide the scientific basis for design theory and application of fabricated composite structures.
作者
王静峰
潘学蓓
彭啸
赵春风
王波
Wang Jingfeng Pan Xuebei Peng Xiao Zhao Chunfeng Wang Bo(l. Hefei University of Technology, Hefei 230009, Chin Key Lab of Anhui Civil Engineering Structures and Materials, Hefei 230009, China)
出处
《土木工程学报》
EI
CSCD
北大核心
2016年第10期32-40,共9页
China Civil Engineering Journal
基金
国家自然科学基金(51478158
51178156)
教育部新世纪优秀人才支持计划(NCET-12-0838)
