裝配整體式框架U形鋼筋連接節(jié)點試驗研究
[Abstract]:In 1999, China introduced a precast prestressed concrete assembly integral frame structure system (world structure system) from France. It not only has the advantages of fast construction speed, good construction quality, energy saving and environmental protection, but also adopts pretensioned prestress technology to reduce the amount of steel used and the cost of the project, which has been applied and popularized in many practical projects. According to the existing specifications and based on the previous research results, this paper designs three time frame Liang Zhu node specimens and carries on the low cycle repeated test, and uses the finite element software to carry on the simulation analysis. Through experiments and numerical simulation, the mechanical properties of frame joints of the world structure system are deeply understood. The main contents are as follows: (1) the low cycle repeated tests of the nodes in the three systems are completed, and the seismic performance of the joints with different reinforcement ratios and with or without keyways is studied, and the hysteretic curves of the structures are drawn according to the test phenomena and test data. The toughness, energy dissipation capacity and stiffness strength degradation of the joints are quantitatively evaluated. (2) OpenSees is used to simulate and analyze the Liang Zhu joints of the structural system, and the results are compared with the experimental results. The simulation results accurately predict the loading and unloading stiffness and strength degradation of the specimen in each cycle, which reflects the shape and kneading effect of the hysteretic curve of the specimen in the actual test. Different nonlinear beam column elements and different node core area shear models are used in the simulation, and the rationality of the model is discussed. (3) OpenSees is used to analyze the parameters of the nodes. The influence of each parameter on the seismic performance of the joint is explored. (4) according to the test results, the shortcomings of the paper are pointed out, and some suggestions for further research and popularization of the structure system are given. The results show that the toughness of the structural system joints designed according to the code meets the requirements: the design of the specimens should ensure the shear capacity of the core area of the joints and avoid the occurrence of strong members of weak joints. The nonlinear finite element software OpenSees can simulate the response of Liang Zhu joints under low cyclic loading.
【學位授予單位】:東南大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TU378
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