摘要
为解决结构大震后残余变形过大以及复位索体预应力损失的问题,提出了一种具有耗能及复位功能的装配式零初始索力摩擦耗能复位支撑.对该支撑的工作机理、恢复力模型进行了理论推导,应用ABAQUS有限元软件对其力学性能进行了模拟分析,并将理论推导、有限元模拟与试验分析得到的结果进行了对比.结果表明:利用理论推导、有限元模拟及试验分析得到的滞回曲线吻合较好,加载过程中该支撑无刚度退化现象,索体内力呈线性变化,无内力损失,说明该支撑采用2组初始索力为0 k N的索体交替受力构造,可以有效地避免索体的预应力损失问题;该支撑滞回曲线饱满,耗能规律稳定,表明黄铜-槽孔钢摩擦板耗能器可以提供稳定的耗能能力;该支撑卸载至位移零点时,理论推导、试验分析及有限元模拟得到的残余荷载分别为0,-0.12,0 k N,说明该支撑具有良好的复位能力.
To solve the problem of the excessive residual deformation after severe quake and the prestress loss of re-centering cables,a fabricated friction dissipation re-centering brace with zero initial cable force(FZFRB),which has energy dissipation and re-centering capacity,was put forward.The working mechanism and restoring force models of the brace were carried out by theoretical derivation.The mechanical properties were simulated by the ABAQUS software.The comparative analysis of the theoretical derivation results,the finite element simulation results and the experimental results was conducted.The results show that the hysteresis curves obtained by theoretical derivation,finite element simulation and experiments are in good agreement.There is no stiffness degradation during the loading process.The internal force of the cable varies linearly and there is no internal force loss.Therefore,the structure of this brace with alternating bearing of two sets of cables with the initial force of0kN can effectively avoid prestress loss.The hysteresis curves of this brace is full and the energy consumption law is stable,exhibiting that the brass-slotted steel friction plate can provide stable energy consumption.When the displacement of the brace is zero after unloading,the residual loads obtained by theoretical derivation,finite element simulation and experiments are0,-0.12,0kN,respectively,proving that this brace has good re-centering capability.
作者
张爱林
叶全喜
詹欣欣
马晓飞
Zhang Ailin;Ye Quanxi;Zhan Xinxin;Ma Xiaofei(College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structure, Beijing University of Technology, Beijing 100124, China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第1期142-149,共8页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金专项基金资助项目(51278009)
北京市自然科学基金重点资助项目(8131002)
关键词
零初始索力
复位功能
预应力损失
黄铜-槽孔钢摩擦板
受力机理
zero initial cable force
re-centering function
loss of prestress
brass-slotted steel friction plate
force mechanism
