【摘要】 为了了解北京地区典型砖木结构(木柱支撑,木屋盖,外砖墙)农村住宅结构的抗震能力,根据北京地区这类农村住宅结构的调研结果,本文介绍了一座典型砖木结构单层三开间农村住宅2/3缩尺振动台试验结构模型的设计与动力试验结果。按照北京地区8度抗震设防的要求,分别完成了模型在设计小震(0.072g)、中震(0.2g)和大震(0.4g)条件下的振动台动力试验,量测了模型的动力响应,记录了不同激励水平下模型的开裂情况。基于试验结果,分析了这种结构的抗震能力以及该类型房屋的抗震薄弱点,为制定这类结构的抗震加固方案提供依据。更多还原

【Abstract】 In order to investigate the seismic resistant capacity of typical brick-timber structures in rural areas of Beijing,a 2/3 scaled typical brick-timber structure model with timber columns,wood roof and brick peripheral walls was designed and tested on a shaking table,which is a single-story brick-timber structure with three bays.According to the national seismic design code GB50011,the seismic precautionary intensity is 8 for most rural areas in Beijing.Different dynamic base excitation levels,such as design small earthquake with PGA=0.072g,design middle earthquake with PGA=0.2g and great earthquake with PGA=0.4g respectively,were input to the model.Dynamic responses and cracking characteristics on the brick walls were recorded.Based on the test results,the seismic resistant capacity of the model was obtained and analyzed.It was found that due to different lateral resisting stiffness of the front wall and the back wall for different door or window openings,the response of the front wall was far greater than that of the back wall in the longitudinal direction.This leads to out plan flexure of the end brick wall,some key technologies for how to strengthen and retrofit the existing rural brick-timber structure in Beijing are pointed out.更多还原