一种新型自复位耗能拉索支撑的理论研究与数值分析  

Theoretical analysis and numerical simulation for an innovative self-centering energy-dissipative tension-brace system

作　　者：池沛[1,2] 董军[1] 彭洋[1] LIEW J Y R Richard 

机构地区：[1]南京工业大学土木工程学院,南京211816 [2]扬州大学建筑科学与工程学院,扬州225009 [3]新加坡国立大学土木与环境学院,新加坡117576

出　　处：《振动与冲击》2016年第21期171-176,219,共7页Journal of Vibration and Shock

基　　金：国家留学基金委资助项目(201408320150)

摘　　要：传统的支撑框架体系通过材料的塑性屈服耗散地震能量,在震后往往产生较大的残余变形,不仅修复代价高昂,更会严重危害结构的使用安全。提出了一种新型支撑形式——自复位耗能拉索支撑,可在特定的地震水准下降低刚度,耗散地震能量,同时利用复位筋提供的恢复力消除支撑残余变形。对其构造和工作原理进行了详细的说明,建立了力学分析模型,理论推导了在单调荷载和往复荷载作用下的荷载-位移关系,提出了控制参数的计算方法。建立了ABAQUS有限元模型,通过与理论分析结果对比验证了支撑的工作性能。研究结果表明在楼层层间位移角达到2%时,支撑仍然具有完全的自复位能力。提出的力学模型和数值模型可为此类支撑的设计提供理论基础。A conventional braced frame system dissipating seismic energy through its material＇s plastic yield produces larger permanent deformations after major earthquakes.Such permanent deformations affect the structural safety and they are cost to repair.To avoid this drawback,a new tension-brace system capable of self-centering and dissipating energy was proposed.For a given seismic intensity,the proposed system was capable of reducing its stiffness in order to dissipate energy and provide a restoring force to reduce the permanent deformations.The key structure and working principle of the self-centering tension-brace system were presented.The mechanical analysis model was developed to derive the load-displacement relationships under monotonic and cyclic loads.The performance of the tension-brace system was further investigated by using nonlinear finite element software ABAQUS.The analysis results showed that the tension-brace system can still have a full ability of self-centering when the storey drift angle exceeds 2.0%.Both the theoretical and numerical models provided necessary tools and a theoretical basis for designing the proposed self-centering energy-dissipating tension-brace system.

关 键 词：抗震性能 自复位 耗能 支撑 预应力 

分 类 号：TU352.1[建筑科学—结构工程]