Rowlock cavity wall was widely used in rural house in Southern Jiangsu Province from 1980s to 1990s. As one type of masonry structures, the seismic performance of rowlock cavity wall has rarely been studied on. Based on the report of General Seismic Investigation in Jiangsu Qidong, one 1/2-scale rowlock cavity wall structure was modeled as the existing rural house, and was tested on shaking table in lab of Southeast University. After analyzing the failure state of the model, and examining the structural parameters such as natural frequency, damping ratio, floor acceleration, floor shift, strain and crack of the model in load condition of different earthquake wave and intensity, the seismic performance of rowlock wall structure was assessed. And the seismic capacity of the whole model and each piece of rowlock wall was also analyzed. Based on the mortar strength field inspected in model wall, the seismic capacity of model structure under the action of rarely occurred earthquake of level 6 seismic precautionary intensity was estimated. The result showed that the model structure would collapse under the load condition. Obviously, this can not satisfy the seismic precautionary requirement in Code for Seismic Design of Buildings (GB50011-2001). Therefore, some principal reinforcement suggestions were discussed and proposed for existing rowlock cavity wall buildings. The research result of this paper could provide some theoretical foundation for the Aseismic Residential Project of rural peasant house, and also could be referred to for further research on rowlock cavity wall structures.
Rowlock cavity wall is a Chinese traditional masonry wall, which has been extensively used in rural areas of southern China such as Jiangsu, Hunan, Hubei, Zhejiang and Jiangxi Province. After the Wenchuan Earthquake in 2008, peoples began to focus on the seismic capacity of those large amount of rural residential houses built in rowlock cavity wall. To assess the existing houses, it's necessary to make clear the seismic shear capacity of rowlock cavity wall at first. Based on the report of General Seismic Investigation in Jiangsu Qidong, one 1/2-scale two-story rowlock cavity wall house model was built in Southeast University lab, and tested on the shaking table. The model bricks were split from original Eight-five bricks through electric saw, and each side length of model brick is about 1/2 of the side length of original Eight-five brick. During the shaking table test, three earthquake waves were used, and the maximum peak value of table acceleration was 178gal. The shaking table test results showed that those existing rowlock cavity wall houses in rural areas would collapse at the action of earthquake with maximum peak acceleration 125gal, which is defined as rarely earthquake in the zones belong to fortification intensity 6 in Code for Seismic Design of Buildings (GB50011-2001).
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