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  本文關(guān)鍵詞： 推出試驗 側(cè)向壓力 有限元分析 非線性 界面接觸　出處：《西南交通大學》2017年碩士論文　論文類型：學位論文

【摘要】：剪力連接件是組合結(jié)構(gòu)中鋼和混凝土材料結(jié)合在一起共同工作的關(guān)鍵部件,對其開展相應(yīng)的試驗與理論研究具有重要的意義。評定剪力連接件性能最合理且最經(jīng)濟的方法是推出試驗,已有的推出試驗未考慮鋼梁與混凝土板之間的壓力作用。本文依托國家自然科學基金項目"鋼-混凝土組合梁的非線性與徐變耦合效應(yīng)研究",通過改進推出試驗的加載方式,先對試件施加側(cè)向壓力,然后進行剪力加載,針對栓釘剪力連接件和開孔鋼板剪力連接件的力學性能進行了研究。主要研究的工作如下:(1)為了研究側(cè)向壓力對推出試驗試件的影響,設(shè)計并完成了 8組推出試驗。(2)根據(jù)試驗結(jié)果,分析了界面?zhèn)髁C理,擬合出了側(cè)壓力作用下的栓釘類和PBL類鋼-混凝土結(jié)合面的摩擦系數(shù),并通過非線性有限元分析軟件,對試驗試件進行精細化模擬分析,建立接觸單元模擬鋼-混凝土界面摩擦行為,與實測試驗數(shù)據(jù)進行比較,驗證了有限元分析的可行性。(3)通過對栓釘類帶側(cè)壓力的試件進行非線性有限元變參數(shù)分析,得出此類剪力連接件的力學性能變化結(jié)果,為優(yōu)化剪力連接件的仿真分析設(shè)計提供數(shù)據(jù)支撐。(4)統(tǒng)計了國內(nèi)外不同規(guī)范或?qū)W者提出的剪力連接件極限承載力公式,通過對比試驗值和計算值,選出結(jié)果相近的計算公式并進行改進,得到考慮側(cè)壓力作用時的推出試驗試件承載力理論計算公式,為估算不同側(cè)壓力水平下的試件承載能力提供理論依據(jù)。
[Abstract]:Shear joint is a key component of composite structure in which steel and concrete materials work together. It is of great significance to carry out corresponding tests and theoretical studies. The most reasonable and economical method to evaluate the properties of shear connectors is to launch tests. The existing test does not consider the pressure between steel beam and concrete slabs. This paper relies on the project of National Natural Science Foundation "the study of nonlinear and creep coupling effect of steel-concrete composite beam". By improving the loading mode of the extrapolation test, the lateral pressure is applied to the specimen first, and then the shear loading is carried out. The mechanical properties of bolt shear joint and perforated steel plate shear joint are studied. The main work is as follows: 1) in order to study the influence of lateral pressure on the test specimen. According to the test results, the mechanism of interfacial force transfer is analyzed, and the friction coefficients of studs and PBL steel-concrete joints under lateral pressure are fitted out. Through the nonlinear finite element analysis software, the detailed simulation analysis of the test specimen was carried out, and the contact element was established to simulate the interface friction behavior of the steel and concrete, and the results were compared with the measured test data. The feasibility of finite element analysis is verified. (3) by means of nonlinear finite element variable parameter analysis of the specimens with side pressure, the results of mechanical properties change of this kind of shear joints are obtained. In order to optimize the design of simulation analysis of shear connectors, data support is provided. (4) the formulas of ultimate bearing capacity of shear connectors proposed by different codes or scholars at home and abroad are analyzed and compared with experimental and calculated values. A theoretical formula for calculating the bearing capacity of test specimens considering lateral pressure is obtained, which provides a theoretical basis for estimating the bearing capacity of specimens under different lateral pressure levels.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU398.9

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