ABSTRACT

In order to study the dynamic properties of the pagoda with solid structure when affected by an earthquake, take the Xuanzang Pagoda as an example which is one of the World Cultural Heritage Architecture Sites. An 1/8-scale model was constructed for a shaking table test. The principle properties of the structural damage were observed. The natural vibration period of the structure and the acceleration and displacement responses excited by the seismic waves were measured. The structure mode was calculated with the Finite Element Method. The fundamental mechanical parameters were determined with reference to the test result. The dynamic responses of the structure were calculated, and the simulation results were compared with the test. The relationship between the structural acceleration, the displacement response, and the height was analyzed. The distribution of the principle tensile stresses and the equivalent plastic strain was compared with the cracks in the structure. The calculated results of the acceleration and displacement amplification coefficient versus the height agreed with the test results. The dynamic amplification coefficient at the floors depended on the earthquake intensity, load direction, and seismic wave formation. For the cracks of masonry that had a certain influence on the structure dynamic response, the result values determined with the Finite Element Method differed a little from the test results. The research conclusions can provide references for the Xuanzang Pagoda to defend against seismic disasters.

摘要

为了研究结构坚固的佛塔在地震作用下的动力特性，以世界文化遗产建筑遗址之一的玄奘塔为例。为振动台试验构建了一个 1/8 比例的模型。观察结构损伤的主要性质。测量了结构的固有振动周期以及地震波激发的加速度和位移响应。结构模式采用有限元法计算。基本力学参数是参照试验结果确定的。计算了结构的动力响应，并将模拟结果与试验结果进行了对比。分析了结构加速度、位移响应和高度之间的关系。将主拉应力和等效塑性应变的分布与结构中的裂缝进行了比较。加速度和位移放大系数与高度的计算结果与试验结果一致。楼层的动力放大系数取决于地震烈度、荷载方向和地震波的形成。对于对结构动力响应有一定影响的砌体裂缝，采用有限元法确定的结果值与试验结果略有差异。研究结论可为玄奘塔抵御地震灾害提供参考。加速度和位移放大系数与高度的计算结果与试验结果一致。楼层的动力放大系数取决于地震烈度、荷载方向和地震波的形成。对于对结构动力响应有一定影响的砌体裂缝，采用有限元法确定的结果值与试验结果略有差异。研究结论可为玄奘塔抵御地震灾害提供参考。加速度和位移放大系数与高度的计算结果与试验结果一致。楼层的动力放大系数取决于地震烈度、荷载方向和地震波的形成。对于对结构动力响应有一定影响的砌体裂缝，采用有限元法确定的结果值与试验结果略有差异。研究结论可为玄奘塔抵御地震灾害提供参考。对于对结构动力响应有一定影响的砌体裂缝，采用有限元法确定的结果值与试验结果略有差异。研究结论可为玄奘塔抵御地震灾害提供参考。对于对结构动力响应有一定影响的砌体裂缝，采用有限元法确定的结果值与试验结果略有差异。研究结论可为玄奘塔抵御地震灾害提供参考。