砖混结构减震试验研究

On the Sliding-Type Mitigation of Earthquake Disaster of Masonry Structures

介绍了国内外关于结构减震研究的历史及现状,选用滑移减震方法作为研究方向,以未采取特殊构造措施的大开间模型砖房为对象进行模拟地震振动台试验,考察砖混结构滑移减震的实用性。为更好地认清结构滑移减震机理和特性,对影响减震效果的多种参数作适量调整,根据试验所采集的数据定量或定性分析了各参数影响。进而建立了滑移减震体系运动方程和状态转换判别条件,并据此编制了层间剪切型结构弹塑性地震反应计算程序,程序计算结果和试验结果所体现出的一致性表明了本文方法的合理性。

Based on the review of the state-of-the-art of seismic isolation tech- nique of structures, then detailed investigation is carried out on the sliding-type seismic isolation system (STSIS) in the large-bay masonry buildings. To get a clear under- standing of the seismic mitigation mechanism of STSIS. Shaking table test are carried out, several parameters having significant effects on the seismic isolation efficiency are varied in the test. Quantitative and/or qualitative analyses are performed of the effects of these parameters on the efficiency. Motion equations of structures with STSIS are es- tablished, and system state identification conditions are given. Computer programs are developed in which the elastoplastic inter-story shear deformation model is used. Comparisions between the theoretical analysis and the experimental result are in good agreement.