The Test Study Of Seismic Behavior On Rowlock Cavity Wall

Rowlock cavity wall is a traditional Wall of our country, which has been largely used for the construction of Residential housing since the Ming Dynasty. At present, there are a lot of rowlock cavity wall housing in the majority of our towns and villages, but we know little about the seismic performance of the rowlock cavity wall, therefore, to study the seismic performance of such walls is of great significance to rural residential construction on the earthquake disaster prevention of our country.This paper is based on the subject of "Applied Technology of Rural Residential Construction on the Earthquake Disaster Prevention of Hunan Province And Related Policy Research". This paper firstly carried out the spot check of rural residential construction and their status of seismic protection of Hunan province. The results of field survey show that the rowlock cavity wall building in rural areas occupy a large proportion, about 50.6%, and such housing construction lack of seismic protection. This paper also actualizes field test research on dynamic characteristics of the typical rural residential construction in Hunan province, and the analysis shows that the nature vibration period of rowlock cavity wall structure is very short and its earthquake action is strong, which we should attach importance to.This paper emphasizes on seismic behavior of rowlock cavity wall. Based on the experimental study of 18 rowlock cavity walls and 2 solid common walls subjected to horizontal low cyclic loading, this paper analyzed the three modes of brickworks of rowlock cavity wall, with the influence of three kinds of strength of mixed mortar, two kinds of vertical stress and two kinds of aspect ratio. The study consists of failure process and patterns of walls and basic seismic behavior indexes such as the capability of seismic shear, the hysteresis curves, skeleton curves, the stiffness and stiffness degradation, the ductility and deformability. Results from experiments showed that the seismic behavior of rowlock cavity wall is very poor, since its seismic shear strength is low, its stiffness degenerates quickly, its energy dissipation ability is weak and it has very brittle fracture characteristics.Furthermore, by analyzing the factors that affect the capability of seismic shear of rowlock cavity wall, and on the basis of experimental results and the existing masonry structure seismic shear strength theories and formulas, the capability of seismic shear formula of the rowlock cavity walls is presented. The formula coincides well with the experimental results and can be used for calculating the capability of seismic shear of such wall in practice projects.The research results can be used as the theoretical basis on seismic strengthening of rowlock cavity wall...