钢筋-沥青隔震墩砌体结构足尺模型试验研究  

Full-scale experimental research on steel asphalt isolation pier

作　　者：尚守平[1] 黄群堂[1] 沈戎[1] 朱博闻[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《建筑结构学报》2012年第3期132-139,共8页Journal of Building Structures

基　　金：国家十二五科技支撑计划项目(2011BAJ08B02);湖南省科技重点项目"农村民居抗震实用技术及相关政策研究"(064SK4057)

摘　　要：针对广大农村低矮房屋抗震能力普遍不足的现状,根据基础隔震理论,在钢筋-沥青复合隔震层的基础上,提出了钢筋-沥青隔震墩。并以单层单开间砌体结构房屋为研究对象,进行了足尺模型拟动力试验。通过隔震墩上、下楼板布置的拾振器测得上下部加速度幅值,用其比值衡量减震效果。研究结果表明:在各种振动波输入下,隔震墩吸收了大部分的能量,隔震墩上部楼板加速度反应可以衰减到隔震墩下部楼板加速度反应的50%以下,具有较好的减震效果;随着振动频率的增大,水平两个方向加速度衰减系数也相应减小;而随着控制位移的加大,加速度衰减系数相应增大;从输入加速度大小方面分析则随加速度峰值的增大,加速度衰减系数有减小的趋势。In response to the poor seismic performance of the widely constructed low rise residential buildings in rural areas, the steel and asphalt isolation pier is proposed based on the base isolation theory and the composite steel and asphalt isolation layer. The full scale pseudo dynamic test was carried out on a one story and single span masonry building model. The magnitudes of the accelerations at the top and bottom of the isolation pier were measured by acceleration sensors and used to evaluate the seismic mitigation effect. The test results show that the isolation piers can absorb most of the input energy from various earthquake waves. The acceleration of the top slab of the isolation pier can be reduced to be less than 50% of that of the bottom slab of the isolation pier, indicating good earthquake mitigation effect. Along with the increase of the vibration frequencies, the acceleration reduction factors in the two horizontal directions decrease accordingly. With the increase of the controlling displacement, the acceleration reduction factor increases accordingly. With the increase of the input acceleration, the acceleration reduction factors decreases.

关 键 词：低矮房屋 隔震墩 足尺模型 拟动力试验 减震效果 

分 类 号：TU352.12[建筑科学—结构工程] TU317.1