基于性能的RC框架结构现浇板式楼梯抗震性能评估

根据已有楼梯抗震试验结果,给出梯段板抗震性能水平及其量化指标;建立框架结构层间位移角与梯段板抗震性能指标之间的关系,并进行楼梯抗震性能宏观评价;基于梯段板、梯柱、与休息平台直接相连的框架柱等楼梯构件,给出既有RC框架结构板式楼梯抗震性能评估的具体方法和步骤.

Component-performance-based seismic assessment of reinforced concrete plate stairs in existing frameworks

Several types of unexpected failures were found in the reinforced concrete (RC) plate stairs of some buildings in 2008 Wenchuan earthquake. It is of great significance to assess the seismic performance of stairs in existing RC frame structures so as to reduce the risk of seismic damage. Based upon the seismic performance test results o the staircases, this paper managed to determine the seismic performance levels and their quantitative indicators of plate stairs, set up the relationship between the interlayer displacement angle of frame structures and seismic performance indicators of plate stairs, and conduct the macroscopic evaluation of seismic behavior of stairs in according with the framework performance level specified by the code. A method and process of evaluating the seismic the seismic performance of the existing stairs of the RC frame structure were also proposed on account of the performance of components, i.e. stair plates, staircase columns, the structural columns connected with rest platform, and etc.