论文部分内容阅读
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。
Aiming at the current situation that the seismic capacity of low-rise houses in the countryside is generally insufficient, based on the theory of foundation isolation, a steel-asphalt seismic isolation pier is proposed based on reinforced-asphalt composite seismic isolation. Taking the single-story single-block masonry structure house as the research object, the full-scale model pseudo-dynamic test was carried out. The amplitude of the upper and lower accelerations is measured by vibration pickups arranged on the upper and lower floors of the seismic isolation pier, and the damping effect is measured by the ratio. The results show that the seismic isolation pier absorbs most of the energy under the input of various vibration waves, and the acceleration response of the upper floor of the seismic isolation pier can be reduced below 50% of the acceleration response of the lower floor of the seismic isolation pier, which has better shock absorption As the vibration frequency increases, the acceleration attenuation coefficients in both horizontal and horizontal directions decrease correspondingly. As the control displacement increases, the acceleration attenuation coefficient increases correspondingly. The analysis of the input acceleration increases with the acceleration peak Large, acceleration attenuation coefficient tends to decrease.