钢管混凝土斜交网格筒结构地震能量反应分析  

Seismic energy response analysis of a concrete-filled steel tube diagrid structure

作　　者：蔡文哲 王斌[2,3] 史庆轩[2,3] 葛明兰 CAI Wenzhe;WANG Bin;SHI Qingxuan;GE Minglan(School of Urban Planning and Municipal Engineering,Xi’an Polytechnic University,Xi’an 710048,China;State Key Laboratory of Green Building in Western China,Xi’an University of Architecture&Technology,Xi’an 710055,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,西安710048 [2]西安建筑科技大学西部绿色建筑国家重点实验室,西安710055 [3]西安建筑科技大学土木工程学院,西安710055

出　　处：《振动与冲击》2023年第14期92-106,共15页Journal of Vibration and Shock

基　　金：陕西省自然科学基础研究计划(2022JQ-392);国家自然科学基金(52278215);西部绿色建筑国家重点实验室开放研究基金(LSKF202212);陕西省教育厅专项科研计划(22JK0434)。

摘　　要：结合所建立的钢管混凝土柱的轴向恢复力模型对斜交网格筒结构进行了弹塑性时程分析,研究了结构中各能量项的分配规律,从结构-构件-楼层3个层面,依次分析了滞回耗能的分配规律,并探讨了结构动力特性和地震动参数对滞回耗能分布的影响。研究表明:结构主要依靠阻尼耗能和滞回耗能平衡地震输入的能量;斜柱和连梁是斜交网格筒结构的主要耗能构件;斜柱的滞回耗能随楼层增高递减且在模块相接处有明显突变,设计时此处应避免出现较大的刚度突变。研究从能量的角度揭示了斜交网格筒结构的损伤模式和耗能机制,为建立此类结构的地震损伤评估方法提供了参考。Combined with the established axial restoring force model of the concrete-filled steel tube column,the elastoplastic time-history analysis of a diagrid tube structure was carried out,and the distribution of each energy item in the structure was studied.The distribution of hysteretic energy dissipation was analyzed in turn from the three levels of structure member and floor,and the influences of structural dynamic characteristics and ground motion parameters on the distribution of hysteretic energy dissipation were discussed.The research shows that the structure mainly balances the earthquake input energy through damping energy dissipation and hysteretic energy dissipation.The main energy dissipation components of the diagrid tube structure are the inclined column and coupling beam.The hysteretic energy dissipation of the inclined column decreases with the increase of the floor and there is an obvious sudden change at the junction of the modules,so the large sudden stiffness change should be avoided in the design.The study reveals the damage mode and energy dissipation mechanism of the diagrid tube structure from the perspective of energy,which provides a reference for establishing the seismic damage assessment method for diagrid structures.

关 键 词：钢管混凝土柱 轴向恢复力模型 斜交网格筒结构 弹塑性时程分析 耗能机制 

分 类 号：TU375.2[建筑科学—结构工程] TU317.1