Quasi-static Test Study On The Steel Frame Structure Of Traditional Style Building

Traditional style architecture inherits the characteristics of ancient Chinese architecture,such as beauty and spectacular.It not only obeys the trendency of new era,but also carries the Chinese culture forward as well.The structure of traditional style architecture is different from the ancient architecture for the materials and construction techniques and is also different from the modern frame structure which does not have many special traditional components like traditional style architecture does.The mechanical property of it that has diversity in both ancient architecture and modern building as well as the vacancy of a series of mature design specification for the traditional style architecture makes the seismic performance study for traditional style building framework very significant in the aspect of science and engineering.In order to study the failure modes and seismic behaviors of steel frame structures of traditional style buildings,a steel frame structure was designed and manufactured in 1/2 scale of the prototype which was a two-bay and one-storey side hall of a temple in the area with a seismic design intensity of 8 degree.The tests were carried out under constant vertical load and low cycle reversed load.The failure modes were observed.The load-displacement hysteretic loops and the skeleton curve of frame model were obtained.The distribution and order of plastic hinge of the model structure,failure mechanism,hysteretic performance,ductility,energy dissipation capacity,degradation of stiffness and other mechanic characters were analyzed.The results show that failure mechanism of the steel frame of traditional style buildings is the first occurence of beam-hinge and then column-hinge hybrid mechanism.The load-displacement hysteretic loops appear pinching phenomenon,S-shaped,which show shear-slip character.The energy dissipation coefficient and the equivalent viscous damping coefficient is respectively 0.531 and 0.085.The average of the overall ductility factor is 3.0.It shows that the steel frame structure has a bad performance on energy dissipation capacity.The ultimate elastic-plastic drift rotation is over 1/20,which indicates excellent capacity of collapse resistance.The Dougong parts are first damaged under the low cycle reversed load,showing that it would reduce the seismic load effect at the beginning of the earthquake.The main failure mode of Dougong is shear deformation and special attention should be paid in design.The research results based on the experimental study and finite element analysis,in this paper,could provide reference to further study on the seismic behavior of traditional style building and engineering practice.