Research On Seismic Behavior And Shear Capacity Of Plate-reinforced Composite Coupling Beam

Coupling beam is(super) high building structure key energy component, its carrying capacity, ductility and energy dissipation capacity seismic performance couplet limb shear wall structure has a great influence. plate-reinforced composite coupling beam(PRC) is a new type of coupling beam form, is a kind of bearing capacity, deformation capacity, energy dissipation capacity and construction and other aspects of comprehensive performance better beam form, but so far, on the small span-to-depth ratio(ln/h≤2.5)of PRC beams is less, therefore, the and the shear strength were analyzed through the experimental study and numerical simulation on seismic performance of PRC beams with small span to depth ratio. The main research contents and results are as follows:(1)For cyclic loading test of 5 PRC beams with small span-to-depth ratio specimens, analysis of failure process, the failure characteristic, bearing capacity, deformation capacity and energy dissipation capacity. The results show that, the specimens can be classified as shear failure or shear bond failure, PRC beams embedded steel plate can significantly improve the small cross shear bearing capacity and energy dissipation capacity of the coupling beam; With the thickness of steel plate increases, the cracking load, ultimate load, beam crack displacement and ultimate displacement increases, delaying the development of diagonal cracks.(2) By two unit to create a finite element model and verification, internal force using the solid element model. The test of longitudinal reinforcement in embedded steel plate bending moment, strain and shear, axial force; on parameters by using layered shell element model, the creation of 64 model research, the span-to-depth ratio of steel plate and the rate of longitudinal reinforcement ratio on the shear strength of the effect, results show that: the layered shell element model than the solid element model is more close to the experimental results, the span depth ratio, embedded steel plate plate rate is PRC short span coupling beam of shear bearing capacity of the most important factors.(3) By superposition theory of intensity, based on the type of steel concrete composite frame beam shear capacity calculation method, which is suitable for short span PRC beam calculation formula of shear bearing capacity, and the results were compared with other related calculation. The results show that the proposed high, small span PRC beam shear capacity formula of standard deviation is smaller, more close to the calculation results of the actual shear capacity, puts forward the calculation formula of shear bearing capacity can be accurately predicted by the high ratio of PRC beams with small span shear capacity.