【摘要】 结合近年来地震中现浇钢筋混凝土框架结构楼梯的破坏特点,针对现行楼梯设计中存在的问题,提出了在框架结构楼梯间的梯板与梯梁之间设置减震防倒塌支座,卸掉梯板斜撑效应的同时,保证楼梯间结构大震不倒。通过算例分析了各种楼梯结构做法的抗震性能,指出传统滑动支座做法存在的安全隐患。最后提出了楼梯间减震防倒塌支座的设计方法。更多还原

【Abstract】 According to the damage feature of a stair for reinforced concrete frame in an earthquake and the specifics of problems in the current design of a stair,damping and collapse preventing bearing for reinforced concrete frames were submitted based on the sliding bearing in the current standard and the schematic handbook of problems in the current design of a stair. The seismic behavior of different kinds of stair structures was analyzed. Pushover and elasto-plastic time history analysis of traditional sliding bearing and damping and collapse preventing bearing were conducted and hidden danger of traditional sliding bearing was indicated. Finally,a design method of damping and collapse preventing bearing was proposed.更多还原