摘要
为研究同时采用通柱和叠柱的混合式楼阁木结构在地震作用下的动力响应和抗震性能,以聊城光岳楼为研究对象,设计制作了缩尺比例为1/4.5的简化模型结构,对其进行了模拟地震振动台试验。选取El Centro波、Taft波和人工波作为地震激励,得到了模型结构在不同水准地震作用下的破坏模式、动力特性、加速度响应、位移响应和应变响应。结果表明:震后模型结构破坏主要集中在榫卯节点轻微拔榫、栌斗横纹劈裂和部分上槛外闪;模型结构震后的1阶和2阶频率分别下降了22.8%和7.8%,相应阻尼比分别增加了59.3%和18.7%;模型结构各层的加速度放大系数整体变化范围和0.40~1.0,且随输入激励强度的增加而减小;7度罕遇地震作用下,模型结构最大层间位移角为1/29,未发现明显的倾斜破坏,模型结构具有良好的变形能力。
To investigate the dynamic response and seismic performance of a hybrid timber pavilion structure that combines both through-columns and stacked columns under earthquake motions,shaking table tests were performed on a simplified model of the Liaocheng Guangyue Tower with a scale ratio of 1/4.5.El Centro waves,Taft waves,and artificial waves were selected as seismic excitations,and the failure modes,dynamic characteristics,acceleration responses,displacement responses and strain responses of the model under different seismic intensity levels were obtained.The results indicate that the model damage primarily concentrated on slight pull-out of the mortise-tenon joints,mild cracking of the Ludous,and partial outward inclination of partial upper sill.The first and second natural frequencies of the structure decreased by 22.8%and 7.8%,respectively,while the corresponding damping ratios increased by 59.3%and 18.7%.The acceleration amplification coefficients for each floor of the structure ranged between 0.40 and 1.0,and decreased with increasing seismic excitation intensity.The maximum story drift angle of the structure was 1/29 under the excitation of rarely occurring 7-degree earthquake,with no significant tilting damage observed,indicating good deformation capacity of the structure.
作者
孟昭博
任现才
吴亚杰
谢启芳
王龙
张立伟
MENG Zhaobo;REN Xiancai;WU Yajie;XIE Qifang;WANG Long;ZHANG Liwei(School of Architecture and Engineering,Liaocheng University,Liaocheng 252000,China;School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;School of Civil Engineering and Transportation,Northeast Forestry University,Harbin 150040,China;China Jikan Research Institute of Engineering Investigations and Design Co.,Ltd,Xi’an 710043,China)
出处
《建筑结构学报》
北大核心
2025年第9期158-167,共10页
Journal of Building Structures
基金
国家自然科学基金项目(52108284,52178303)。
关键词
楼阁式木结构
光岳楼
振动台试验
动力特性
抗震性能
pavilion-style wooden structure
Guangyue Tower
shaking table test
dynamic characteristic
seismic performance
