空斗墙抗震受剪承载力分析与振动台试验研究

Analysis and Shaking Table Experimental Study on Seismic Shear Capacity of Rowlock Cavity Wall

为评估我国农村现有空斗墙砌体的抗震能力,调查了江苏启东农村空斗墙砌体的结构形式和砌筑砂浆强度。参考25片空斗墙拟静力试验结果,提出了空斗墙受剪破坏模型,得到了基于库摩理论的受剪承载力经验公式。通过一个2层1/2模型的空斗墙振动台试验,分析了空斗墙的抗震性能,修正了经验公式。根据空斗墙砌体砂浆强度的调查数据和振动台试验分析,得出了农村现有空斗墙砌体的抗震能力,并认为其不能满足规范对6度区的抗震设防要求。

To handle the seismic shear capacity of rowlock cavity wall in rural area of southern China,an investigation for the structural type and the strength of construction mortar of rowlock cavity wall is taken in Qidong city Jiangsu Province.Base on the Coulomb friction theory,one shear model for rowlock cavity wall is suggested,and one empirical formula forcalculating the shear capacity of rowlock cavity wall is proposed,referring from the pseudo-static test results of 25 pieces of rowlock cavity walls.One 1/2-scaled two-story model is built and tested on shaking table.The seismic performance and shear capacity of rowlock cavity wall house is analyzed and the empirical formulas are amended.Using the investigated mortar strength results,the aseismic performance of rowlock cavity wall masonry structure is analyzed and the conclusion is that,the existed rural rowlock cavity wall masonry structures in those areas with precautionary intensity six can not satisfy the specifications in seismic design code.