消能减震楼梯的减震原理与减震效果分析

Analysis of the Principle and Effect of the Energy Dissipation Buffering Stair

提出一种新型消能减震楼梯,阐述其消能减震的原理,给出3种构造方案。采用SAP2000分别对设置普通楼梯、消能减震楼梯、滑动楼梯和不设楼梯的框架结构进行多遇地震下的地震反应分析。分析结果表明:①消能减震楼梯消除了普通楼梯梯板的等效强支撑效应,楼层剪力和楼梯间的框架柱、梯柱及梯板的轴力均明显减小;②消能减震楼梯结构楼层剪力、层间位移角均比滑动楼梯结构明显减小;③对框架结构进行抗震设计时,需考虑楼梯对结构的影响。消能减震楼梯减震效果明显,保证了整体结构和楼梯间的安全可靠,为楼梯抗震设计提供一种有效的新途径、新方法,具有广阔的工程应用前景。

A newly-developed buffering stairs conducting energy dissipation in a structure is put forward and three kinds of construction scheme based on the specific energy dissipation principle stated in the paper are given. Afterwards, the seismic response of four patterns of frame respectively set with normal stairs, buffering stairs, slide stairs and non-stairs is analysed by using the SAP2000. Accordingly the analytical result shows that：①the buffering stairs can eliminate the strong equivalent supporting effect, the story shear force and the axial force of frame column, ladder column and ladder board in staircase are decreased obviously ; ② comparing with slide stairs, story shear force and story drift are decreased obviously;③the influence of the stairs to the structure should be considered when for seismic design of frame structure. In a word, the buffering stairs are effective in shock absorbing, thus it possesses very broad prospect in engineering practice.