Experimental Study On The Shear-Compression Behavior Of The Autoclaved Aerated Concrete Bearing Masonry

Masonry structure is mainly applied in the multistory building in China nowadays and in the future. In course of construction or application, it is generally in complicated stress state, normal stress which applied on masonry structure have great effect on its shearing behavior, especially in China, normal stress signifies much in seismic shearing behavior.Shearing strength of AAC masonry with stacked bond is comparatively low, while in practical project masonry structure is generally in shear-compression composite state, the shear shows correlative variation with compression applied on it. How to address an appropriate normal stress, which can make its shearing strength display adequately, and avoiding compressive failure become necessary other than failure mechanism and failure mode. Through experiments on 54 pieces of minitype masonry structure, the normal stress which influences its shearing behavior is studied and analyzed. Based on the experimental results, the correlative curve of shear-compression is obtained, a formula to calculate the shearing strength of AAC masonry is suggested and the computational results show good agreement with the tests.Normal stress influences obviously on seismic shearing behavior in lateral earthquake response. In this paper, based on the experimental investigation of quasi-static test of 3 AAC walls, the features such as failure feature, seismic shearing behavior under different normal stress are studied, on the basis of experimental results and the existing masonry seismic shearing strength theories and formulas, the seismic shearing strength formula of the AAC walls considering normal stress is presented, thus can provide reference for design and practical project.