摘要
木骨架竹片覆面墙板结构体系是一种面向小型民居的新型建筑结构形式。为研究其抗震性能,制作了一个平面尺寸为3.58 m×3.55 m、层高为3 m的两层足尺结构模型开展振动台试验研究。试验中选取El Centro波、景谷波分别在X、Y向输入地震动,实测了结构在峰值加速度为0.07g、0.2g、0.4g、0.62g以及0.92g的地震作用下的自振频率、阻尼比、加速度反应、位移反应、剪力分布与剪重比、能力谱的变化规律。研究结果表明:随着地震激励增大,模型自振频率减小,阻尼比增大;除了模型二层在El Centro波作用下动力放大系数达到2.1外,其余动力放大系数介于1.0~1.9之间,试验模型层间具有很好的耗能能力;模型在峰值加速度0.07g、0.2g、0.4g和0.62g的地震激励下,最大层间位移角分别为1/1364、1/680、1/323和1/217,均发生在一层X向。当峰值加速度增至0.92g时,模型依然未倒塌,表明该结构体系具有很好的抗震性能,能够满足我国GB 50011—2010《建筑抗震设计规范》(2016版)"小震不坏、中震可修、大震不倒"的要求。
The shear wall structure system with bamboo chip sheathing panels is a new type of architectural structure for small dwellings.In order to study its seismic performance,an earthquake simulation shaking table test on a model of a full size two-story framed house was carried out,with 5.58 m by 3.55 m in plan,and 6.0 m in height.The El Centro wave and Jinggu wave were selected as input excitations in X and Y direction,respectively.The natural frequency,damping ratio,acceleration response,displacement response,shear force distribution and shear to total weight ratio,capacity spectra of the structure under the earthquake actions with input peak acceleration of 0.07g,0.2g,0.4g,0.62g and 0.92g were obtained.The experimental results show that with the increase of earthquake peak acceleration,the natural frequency of the model structure decreases,and the damping ratio increases.The dynamic amplification coefficient of each story fluctuates between 1.0 and 1.9,except reaching 2.1 on the second story of the model under El Centro wave,which indicates a good ability of absorbing and dissipating energy between stories of the specimen.Under input peak acceleration of 0.07g,0.2g,0.4g and 0.62g,the maximum interstory drifts of the model were 1/1364,1/680,1/323 and 1/217 in X direction of the first story,respectively.When the input peak acceleration increases to 0.92 g,the model does not collapse.The results show that the structure system has good seismic performance and can meet the requirements of GB 50011—2010‘Code for Seismic Design of Building in China(2016 ed)’.
作者
高永林
柏文峰
苏海红
苏何先
GAO Yonglin;BAI Wenfeng;SU Haihong;SU Hexian(Faculty of Architecture and Urban Planning,Kunming University of Science and Technology,Kunming 650500,China;Faculty of Management and Economics,Kunming University of Science and Technology,Kunming 650093,China;Seismic Institute of Yunnan Province,Kunming 650500,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2020年第S02期1-10,共10页
Journal of Building Structures
基金
国家重点研发计划(2017YFC0703504)
国家自然科学基金项目(51868032)
云南省级人培项目(KKSY2018130080)
关键词
竹片覆面墙板结构
木骨架竹片覆面墙板
振动台试验
抗震性能
bamboo chip sheathing panel structure
bamboo chip sheathing panel
shaking table test
seismic performance
