Research On Shaking Table Test Of Rough Block Stone Masonry Building

In southeast China, the country buildings are mostly stone structure because in these areas stone is abundantly available. While survey has been made on the condition of these stone buildings, it indicated that the construction quality of the stone buildings were spotty, few of them adopted seismic means according to the nodes, this leaded to poor seismic capacity of the buildings. In order to figure out some design methods not only made the structure satisfied with the request of seismic but also available in these areas. This paper studied the seismic behavior of stone buildings by a two-story of single span stone structure model with a half reduced scale on shaking table. The model prototyped for the country buildings in southeast China, adopted seismic mean by putting rebar in the junction of the vertical and horizontal walls. This paper studied the seismic behavior of buildings of this type, analyzed the strengthen measure in this test. Proposals have been proposed for designing and construction based on the study.The main research contents and research results in this paper are shown as follows:(1)A shaking table test of a stone structure model has been performed, observation of failure mode of the structure under each earthquake action was made. Based on this, this paper analyzed the seismic weak position of the stone structure, verified the seismic behavior of the structure which was strengthened with seismic means.(2)Analysis of the dynamic response of the structure has been made. It contained acceleration, velocity and strain of the reinforcement bars. Reach has been made on the changing of natural frequency, damping ratio and vibration mode under different earthquake of different intensity. Response of acceleration and velocity of the structure under different earthquake load have been analyzed. The mechanic behavior of reinforcement bars in the corner of the structure and their impact to the seismic behavior of the structure have been studied.(3) Evaluation of the seismic behavior of the stone masonry buildings without tie beams and columns has been made based on the test results. The structure met the requirements of the 7 degree. In order to improve the seismic behavior of the stone structure, viable proposals have been tabled for designing and construction of stone structure.(4)The finite element analysis software ANSYS was used to modeling the stone structure, modal analysis and time-history analysis have been performed. It reached the differences of the structure and the response of acceleration under the earthquake load, analyzed the weak area, studied the seismic behavior of the structure. It indicated that the results of the finite element modeling were consistent with the test results, it could provide a reference for other simulation. Besides, based on the contrast of whole stone structure and strengthen stone structure, conclusion has been made that the strengthen measure of embedding reinforcement bars in the corner improved the seismic performance of the structure, the strengthen structure could meet the seismic requirements of 7 degree (0.15g).Results of this paper provided reliable basis for designing and construction of the stone structure in both south-east area. It has significant reference value for composing relevant norms.