Experimental Study On Short-span Coupling Beams With Bidiagonally Reinforced Bar And Design Advise

At present, he coupling beams in each floor can not only influence and assure the lateral stiffness of whole structure, but also be the primarily energy dissipating elements in coupled walls structure under several earthquake by plastic hinges. The steel layout and shear resistance design based on conventional design method of beams can not assure well ductility and well energy dissipating under several earthquake ,Shear failure is inevitable in the ends of coupling beams .Therefore, a new steel layout scheme that not only meet the specification of small span-to-depth ratio coupled beams and perform well maneuverability of construction ,but also perform well ductility and energy dissipating is the technical matters of reinforced concrete structures with seismic resistance design which should be settled immediately.The advice on new reinforcement scheme of small-span-to-depth-ratio coupling beams, have been given by our research group. By the experiment, well seismic resistance behavior and project applicability of new reinforcement scheme have been proved. In order to reduce the complexity of construction, the author suggest only adding diagonal bars on the basis of traditional reinforcement, and the experimental investigation on seismic resistance behavior have been accomplished.For perfecting the research, the main study work of this thesis is as following;â‘ Research the seismic resistance behavior of coupling beams in the full range of small-span-to-depth-ratio when shear-compression is not less than 2.0.â‘¡To determine the use level of the diagonal bars of the design.â‘¢Present integrated design advice of diagonal reinforcement scheme coupling beams with small span to depth ratio.Experimental investigation has proved that the seismic resistance behavior of the Coupling beams with diagonal bars in full range of small-span-to-depth ratio meet the seismic demand , when shear-compression is not less than 0.2.The generalization of this project has already been done, the reference advice and last suggestion for achieving this research have been presented preliminary.