钢筋混凝土多高层建筑结构在地震作用下的割线刚度分析法

基于性能/位移的抗震设计,采用振型分解反应谱法进行抗震分析,并根据钢筋混凝土框架及抗震墙模型的试验数据,确定各变形阶段框架及抗震墙的割线刚度,分析了多高层建筑结构侧移的成分,以及引起震害的侧移。将不同变形阶段框架及抗震墙的割线刚度、目标位移的控制值与引起震害的侧移值相联系,对钢筋混凝土多高层建筑结构进行分析。预估结构遭遇本地区多遇地震、设防烈度地震及罕遇地震时的弹塑性变形和弹塑性内力的重分布,以便了解和把握地震时结构的行为。为基于性能/位移的抗震设计方法,提供了新的分析途径。

SECANT STIFFNESS ANALYSIS METHOD OF R. C. HIGH-RISE BUILDING STRUCTURES UNDER SEISMIC ACTIONS

Performance/displacement-based aseismic design, that the mode of vibration resolved seismic response spectrm approach is used to carry on the aseismic analysis of building structures, according to the existing experimental tested data of the R. C. frames and aseismic walls models, hence, the secant stiffness of frames and aseismic walls at different deformation stages are determined, the composition of lateral displacements of R. C. high-rise building structures, as well as, the lateral displacements causing seismic damage are analyzed. Getting in touch with the secant stiffness of frames and aseismic walls at different deformetion stages, the control values of target displacements and the volues of lateral displacements causing seismic damage, then, the analysis of R. C. high-rise building structures is carried on. Further, the predicting estimation of structural elas-to-plastic deformation and elasto-plastic redistribution of internal forces, which are hit by localized building structures, at the time of frequent earthquate, fortified intensity earthquake and rarely earthquake respectively, should be made, so that the behavior of the structures at the time of earthquake can be understood and grasped. A new analysis way is provided for perfor-mace/displacement-based aseismic design.