高強箍筋混凝土梁柱節(jié)點抗震性能及承載力研究
[Abstract]:In recent years, high strength concrete (HSC) has been widely used. On the one hand, high strength stirrups can restrain the concrete more effectively, so as to improve the brittleness, strength and ductility of HSC. Improving the seismic performance of the structure; On the other hand, it can improve the shear capacity of reinforced concrete members and save steel. Therefore, the study of high strength concrete confined by high strength stirrups is of great significance. As an important part of frame structure, joint is the transmission hub of frame Liang Zhu and the weak link of frame. In this paper, experimental research, theoretical analysis and numerical simulation are adopted. Deep research on reinforced concrete frame joints with high strength stirrups is carried out. The main contents are as follows: the pseudostatic test of five specimens of Liang Zhu joints with high strength stirrups is carried out, and the influence of high strength stirrups on the seismic behavior of joints is analyzed. The effects of hoop form and hoop ratio on shear capacity ductility and energy dissipation capacity of joints are considered. Based on the basic theory of modified pressure field, the shear analysis model of Liang Zhu joint is established, and the shear resistance of 86 joint test specimens and the test specimens in this paper are analyzed, and the concrete strength and axial compression ratio are taken into account. The effect of hoop ratio and stirrups strength on the reliability of the shear analysis model is verified by comparing the theoretical results with the experimental results. Based on the OpenSees structural nonlinear analysis software platform, a finite element analysis model for Liang Zhu joints of high-strength stirrups concrete is established. The nonlinear analysis and simulation of the test specimens are carried out, and the simulation results are compared with the experimental results. Verify the reliability of the model.
【學(xué)位授予單位】:西安建筑科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:TU375;TU352.11
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