摘要
为建立空腹式劲性钢筋混凝土(LSRC)柱的恢复力模型,本文通过五个LSRC柱的低周反复荷载试验.分析了试验现象和试验机理;以统计同类试验结果为基础,建立了LSRC柱的斜截面抗剪极限点、屈服点等关键点以及延性系数的计算公式;形成了考虑试件轴压比等影响因素的骨架曲线,统计了LSRC柱在低周反复荷载作用下的强度退化、刚度退化、以及滑移等滞回特征,从而构造了LSRC柱的恢复力模型,此模型可用于对结构进行Pushover分析和弹塑性时程反应分析。
Based on the tests of 5 lattice type steel reinforced concrete (LSRC) columns, subjected to constant axial compressive forces and reversed cyclic loading, this paper compares and analyzes the testing phenomena and mechanics of these columns. The formula of ultimate shear strength, corresponding displacement and ductility factor are also proposed, involving the results of parallel tests, to form a general skeleton curve. Then, this paper builds up the hysteretic rule of the LSRC columns, which synthetically reflects their degradation of strength, stiffness and the characteristic of slip. The restoring force model of LSRC column is thus formed for the application of nonlinear dynamics analysis as well as static structural calculations.
出处
《结构工程师》
2004年第6期59-65,24,共8页
Structural Engineers
