兴教寺基师塔动力特性测试分析

发布时间：2018-03-14 00:08

本文选题：砖石古塔　切入点：动力测试　出处：《建筑结构》2017年21期 　论文类型：期刊论文

【摘要】：基师塔位于陕西省西安市兴教寺内,是"丝绸之路"起点世界文化遗产建筑之一。为了研究基师塔的动力特性及损伤状况,为其抗震保护及加固修复提供科学依据,应用超低频动力测试系统对该塔进行了原位动力测试试验,采集了在地面脉动作用下古塔结构振动的速度及位移信号,对速度信号进行自谱分析,得到了基师塔的振动频率。应用有限元软件ANSYS建立了基师塔的数值计算模型,计算了古塔的动力特性,将计算结果与测试结果进行对比,评定了基师塔的结构损伤。结果表明,基师塔沿东西方向与南北方向第1阶振动频率较为接近,塔底底层开洞对其振动频率略有影响,宏观损伤较为严重,宜做进一步的损伤测试与分析。
[Abstract]:Located in Xingjiao Temple of Xi'an City, Shaanxi Province, it is one of the world cultural heritage buildings starting from the Silk Road. In order to study the dynamic characteristics and damage condition of the pagoda, it can provide scientific basis for its seismic protection and reinforcement and restoration. The in-situ dynamic test of the tower was carried out by using the ultra-low frequency dynamic test system. The velocity and displacement signals of the ancient tower structure were collected under the action of ground pulsation, and the velocity signals were analyzed by self-spectrum analysis. The vibration frequency of the foundation master tower is obtained. The numerical calculation model of the foundation master tower is established by using the finite element software ANSYS, the dynamic characteristics of the ancient tower are calculated, the calculated results are compared with the test results, and the structural damage of the foundation master tower is evaluated. The first order vibration frequency of the foundation tower along the east-west direction is close to that of the north and south directions. The opening of the bottom of the tower has a slight influence on the vibration frequency, and the macroscopic damage is relatively serious, so it is appropriate to do further damage testing and analysis.
【作者单位】：西安理工大学土木建筑工程学院;陕西省建筑科学研究院;陕西省文物保护研究院;
【基金】：国家自然科学基金资助项目(51308455) 陕西省自然科学基础研究计划资助项目(2015JM5206) 住房与城乡建设部科技计划项目(2014-K2-018) 陕西省博士后科学基金资助项目
【分类号】：TU317

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