结合脉动测试的金刚宝座塔地震反应分析及震害预测

发布时间：2018-01-03 23:30

本文关键词：结合脉动测试的金刚宝座塔地震反应分析及震害预测　出处：《防灾减灾工程学报》2017年05期 　论文类型：期刊论文

【摘要】：为了研究内蒙古呼和浩特市慈灯寺金刚宝座塔的抗震性能,测试了金刚宝座上五座小塔的动力特性,并建立数值模型计算结构的动力特性。通过动力特性比较,确定了结构整体等效弹性模量,输入调幅后的三向EL-Centro波计算古塔的地震反应,输出古塔各层应力响应、弹性位移响应、最大层间位移角以及塔底加速度时程。结果表明:中塔的水平剪应力在塔体中部最大,中塔竖向正应力、边塔水平剪应力和竖向正应力在塔体底部最大;层间位移值在塔体顶部最大,中塔和边塔的结构薄弱层分别为4层与顶层以及底层与顶层。慈灯寺塔在8度多遇地震下塔体基本完好,在8度罕遇地震下塔体上部将产生严重破坏。设置金刚宝座降低了各小塔的振动频率,加大了塔体底部的加速度幅值,不利于古塔的抗震性能。
[Abstract]:In order to study the seismic behavior of the Jingang throne tower of Cilangsi in Hohhot, Inner Mongolia, the dynamic characteristics of five small towers on the throne were tested, and a numerical model was established to calculate the dynamic characteristics of the structure. The equivalent elastic modulus of the whole structure is determined, and the seismic response of the ancient tower is calculated by the three-way EL-Centro wave after the amplitude modulation, and the stress response and the elastic displacement response of the tower are outputted. The results show that the horizontal shear stress of the middle tower is the largest in the middle of the tower, the vertical normal stress of the middle tower, the horizontal shear stress and the vertical normal stress of the side tower are the largest at the bottom of the tower. The displacement value of the floor is the largest at the top of the tower, the weak layer of the middle tower and the side tower is 4 stories and the top layer and the bottom layer and the top floor, respectively. The tower is basically intact under the frequent earthquake of 8 degrees. Under the rare earthquake of 8 degrees, the upper part of the tower will be seriously damaged. The setting of the King's throne reduces the vibration frequency of each small tower, increases the acceleration amplitude at the bottom of the tower, and is not conducive to the seismic performance of the ancient tower.
【作者单位】：西安建筑科技大学;西安理工大学;
【基金】：国家自然科学基金项目(51308455) 陕西省自然科学基金项目(2015JM5206) 住房与城乡建设部科技计划项目(2014-K2-018) 陕西省博士后基金项目(2014)资助
【分类号】：TU352.11
【正文快照】： 引言砖石古塔是我国古代高层建筑的杰出代表,也是优秀的历史文化遗产,体现了我国古代在政治、文化、宗教方面的杰出成就。然而,因地处环太平洋地震带与亚欧地震带的交汇处,也是世界上地震多发国家之一,历次地震使砖石古塔破坏严重,部分古塔甚至因地震作用发生倒塌而损毁,如浙

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