低层楼阁式木结构古建筑抗震性能振动台试验研究  

Shaking table test study on seismic performance of low-rise pavilion type ancient timber structure

作　　者：王龙 胡宸瑜[2,3] 谢启芳 郑建国[1] 李俊连 WANG Long;HU Chenyu;XIE Qifang;ZHENG Jianguo;LI Junlian(China Jikan Research Institute of Engineering Investigations and Design,Co.,Ltd.,Xi’an 710043,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]机械工业勘察设计研究院有限公司,陕西西安710043 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西南交通大学土木工程学院,四川成都610031

出　　处：《振动工程学报》2025年第2期340-351,共12页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(42277151,52478143);陕西省“高层次人才特殊支持计划”科技创新领导人才项目(TZJH001);国机集团青年科技基金培育项目(2024-PY-19)。

摘　　要：为研究低层楼阁式木结构古建筑的抗震性能,以西安钟楼为研究对象,制作了一个缩尺比例为1∶6的结构模型,并对其进行地震模拟振动台试验,试验选取Kobe波、兰州波和汶川波作为地震动输入,考虑了7度多遇至9度罕遇的烈度水平,最终分析得到了不同水准地震作用下结构的动力特性、动力响应及耗能的变化规律。试验结果表明:随着地震加速度峰值的增加,模型结构自振频率降幅较小,阻尼比增幅较大;结构的刚度沿高度分布不均匀,外金柱斗栱层的刚度最小,最大的层间位移角也发生在此处;加速度放大系数基本小于1,减震效果明显;与现代建筑结构相比,模型结构的塑性变形能占比较小,有利于减轻结构的损伤。To study the seismic performance of low-rise pavilion-type ancient timber structure,shaking table tests were conducted on a 1:6 scaled model of the Xi’an Bell Tower.The Kobe wave,Lanzhou wave and Wenchuan wave with the seismic intensity levels ranging from 7-degree frequently to 9-rarely were considered as input excitations.The dynamic characteristics,dynamic re-sponses and energy consumption of the structure were identified.The test results indicate that,as the peak ground acceleration(PGA)increased,the natural frequency of the model structure decreased marginally,while the damping ratio increased significant-ly.The stiffness was not uniformly distributed along the height of the structure,with the smallest stiffness found at the Dougong storey on the external gold cylinder,which also experienced the maximum inter-story drift.The acceleration amplification factors of the model were generally less than 1,exhibiting obvious seismic reduction effects.Compared with modern structures,the plastic strain energy of the ancient timber structure was relatively small,which helps reduce structural damage.

关 键 词：抗震性能 木结构古建筑 振动台试验 西安钟楼 

分 类 号：TU352.1[建筑科学—结构工程] TU366.2