农居工程地基砂垫层隔震体系性能试验研究

Experimental Study on the Performance of Sand Cushion IsolationSystem in the Foundation of a Rural Residential Project

摘要:

砂垫层具有取材方便、造价低、施工简便的特点，为了更好地在农居工程建设中推广应用地基砂垫层隔震技术，通过制作农村房屋结构模型，进行地基砂垫层隔震体系与无隔震体系的大型振动台试验，研究了地基砂垫层隔震体系的隔震性能。基于结构加速度反应、结构位移反应和结构应变反应三个方面，对比分析无隔震试验和地基砂垫层隔震试验的结果，研究地基砂垫层隔震体系的隔震性能。结果表明：地基砂垫层隔震体系能够有效地减小上部结构的地震加速度反应、层间位移反应和应变反应，具有良好的隔震效果；输入地震动的量级是影响地基砂垫层隔震体系隔震效果的一个重要因素。

Abstract:

The sand cushion exhibits the characteristics of convenient material selection, low cost, and simple construction. To better promote and apply the sand cushion isolation technology to the foundation of rural building construction, large-scale shaking table tests of foundations with sand cushion isolation systems and non-isolation systems were performed to study the performance of the foundation isolation system with a sand cushion by making the structural model of the rural houses. Based on the structural acceleration response, structural displacement response, and structural strain response, the seismic isolation performance of the foundation isolation system with a sand cushion was studied by comparing the non-isolation and isolation test results of the cushion isolation system. The results exhibited that the foundation isolation system with a sand cushion can effectively reduce the seismic acceleration response, story drift response, and strain response of the superstructure and achieve a good isolating effect. The magnitude of the input ground motion is an important factor that influences the isolation effect of the foundation system with a sand cushion.