本文针对某平面不规则、立面开大洞、带高位转换层的超限复杂高层结构，首先建立了整体模型结构的非线性计算模型，根据振动台试验结果选择了材料非线性参数，进行了弹塑性时程分析，并对模型结构及参数进行了验证。用验证过的模型和参数对原型结构进行了弹塑性时程分析，并对该结构作出整体抗震性能评价。通过本文分析表明，按照试验微粒混凝土材性试验数据，考虑附加质量建立的计算模型，能较好地捕捉到整体结构初始时的频率、振型等动力特性；选择现有的软件确定构件的本构关系，将其输入通用程序进行弹塑性时程分析，能够获得结构的非线性动力反应；通过模型乃至原型结构的弹塑性时程分析，可以对该立面开大洞复杂结构整体抗震性能作出合理评价。

高层住宅结构为满足建筑功能多样化、美观等要求，出现了底部大空间、立面大洞口等特殊效果的短肢剪力墙—筒体结构形式，对该复杂结构体系整体抗震性能的评估，需进行专门的试验研究和计算分析。本文针对具有上述结构特点的某高层结构整体模型，进行了模拟地震振动台试验和三维有限元分析，得到了结构的动力特性，以及在7度多遇、基本、罕遇烈度地震作用下的加速度反应、惯性力分布和位移反应等。结果表明，在地震作用下该结构底部墙肢中仅少数构件出现反弯点甚至不出现反弯点；除结构出屋面部分鞭梢效应明显外，其余部分均可以满足现行规范的抗震设防要求；工程设计中宜改善端部筒体以及转换大梁与筒体连接处的强度和延性。

Composite members and hybrid systems are to be widely used in the high-rise buildings to make full use of structural steel and concrete. By employing the steel reinforced concrete (SRC) wall system, structural engineers expect to obtain the increase of stiffness, strength, ductility and fire resistance capacity; the compact cross-section of high-rise systems; and the reduction of construction cost and time. Due to the deficiencies in the present codes and in the research base, however, better rules for determining shear carrying capacity of SRC walls are needed. This paper is focusing on the tests and formulations of SRC coupled walls (SCW) and SRC tubes (ST). Three 1/5 scaled specimens of SCW were tested under cyclic loading and constant axial force, while three ST specimens were subjected to reversed loading without axial force. These specimens were measured with the time history and observed failing in shear. The formulae of ultimate shear strength of SCW and ST were then established on the basis of the shear-bearing mechanism analysis of RC structural walls. Predictions of shear strength from the proposed method are compared with experimental results. Taking the safety margin of the design into consideration, formulae of SRC walls proposed here are suitable for the implementation in a code of practice.

Though extensive research has been carried out for the ultimate strength of steel reinforced concrete(SRC) members under static and cyclic load, there was only limited information on the applied analysis models. Modeling of the inelastic response of SRC members can be accomplished by using a microcosmic model. However, generally used microcosmic model, which usually contains a group of parameters, is too complicated to apply in the nonlinear structural computation for large whole buildings. The intent of this paper is to develop an effective modeling approach for the reliable prediction of the inelastic response of SRC columns. Firstly, five SRC columns were tested under cyclic static load and constant axial force. Based on the experimental results, normalized trilinear skeleton curves were then put forward. Theoretical equation of normalizing point (ultimate strength point) was built up according to the load-bearing mechanism of RC columns and verified by the 5 specimens in this test and 14 SRC columns from parallel tests. Since no obvious strength deterioration and pinch effect were observed from the load-displacement curve, hysteresis rule considering only stiffness degradation was proposed through regression analysis. Compared with the experimental results, the applied analysis model is so reasonable to capture the overall cyclic response of SRC columns that it can be easily used in both static and dynamic analysis of the whole SRC structural systems.

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。