Seismic performance of sandwich clay brick wall #br# structure based on shaking table test
Wang Jin1,2 Zhou Zhongyi1,2 Wang Tao1,2
1. Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, Harbin 150080, China;
2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
Abstract：Clay bricks are extensively used as a main construction material particularly in the north part of China. The bricks are connected through various types of mortars in the bed-and head-joints to form a masonry wall, sustaining gravity and lateral forces. Traditional masonry wall has low thermal properties so that its thickness could be half meter in the coldest regions of China. The large thickness, for the one hand, makes the building so heavy that the seismic resistance capacity less effective, and for the other, takes up a large living area. In order to solve this contradiction, a sandwich clay brick wall is proposed in this study. A thermal insulation layer is inserted between two thinner layers of brick walls which are connected through reinforcing steel meshes. Shaking table test is carried out on one 1/2-scaled 4-story sandwich clay brick wall structure under different earthquake intensities. The seismic performance of the specimen is experimentally evaluated including dynamic characteristics and responses, failure mode, loading and deformation capacity, and damage evolution. The experimental results show that the outer wall, the thermal insulation layer and the inner wall can work together very well due to the restraint of horizontal tied reinforcing steel mesh and the constructional column; the sandwich clay brick wall structure can meet the seismic requirements of fortification level 7, or PGA=0.1 g with the exceedance probability of 10% in 50 years, as stipulated by the China seismic design code (GB 50011—2010).
