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为研究村镇建筑的抗震性能,运用砂垫层隔震理论和基础滑移隔震理论形成的复合隔震技术,设计制作了一单层、单进深、双开间、无构造柱的1/4缩尺复合隔震砌体结构模型,通过削弱橡胶束的限位作用来提升其隔震性能,进行地震模拟振动台试验;以研究低强度改性砂浆滑移层开裂后,复合隔震结构在设防烈度和罕遇烈度地震作用下的隔震效果,对模型的加速度峰值和动力放大系数进行了分析。试验结果表明:复合隔震结构在设防烈度地震作用下滑移量较小,能够一定程度上减小上部结构受到的地震作用;罕遇烈度地震作用下滑移层滑移量加大,可以有效延缓结构的破坏。
In order to study the anti-seismic performance of the village and town buildings, a single-story, single-deep, double-bay, non-structural column of 1/4 was designed and manufactured by using the composite seismic isolation technology formed by the sand cushion isolation theory and the basic sliding isolation theory. Ruler composite seismic isolation masonry structure model, by weakening the limit of the rubber beam to enhance its isolation performance, seismic shaking table test; in order to study the low strength modified mortar slip layer cracking, the composite isolation structure in fortification The seismic isolation effect under strong earthquake and severe earthquake is analyzed. The acceleration peak and dynamic amplification coefficient of the model are analyzed. The experimental results show that the composite structure can reduce the amount of slippage caused by earthquake with strong seismic intensity, and can reduce the seismic effect on the superstructure to a certain extent. The slippage of the slip layer under rare intensity earthquake can be effectively enhanced Delays the destruction of the structure.