基于結(jié)構(gòu)連續(xù)性倒塌的L形RC框架結(jié)構(gòu)平面柱網(wǎng)布置應(yīng)用研究
[Abstract]:Reinforced concrete frame structure is the most widely used structural system in China at present. If the local members of reinforced concrete frame structures are destroyed under accidental loads, it is easy to cause the continuous collapse of the whole structure, resulting in great casualties and property losses. In this paper, based on the L-shaped RC frame structure with irregular plane, the ability of resisting continuous collapse of the structure is analyzed by changing the layout of the plane cylindrical grid of the structure. The main conclusions of this paper are as follows: (1) by analyzing the sensitivity coefficient of L-shaped frame structure which is selected in this paper, the sensitivity coefficient of corner column is the largest. The results show that the failure of corner columns has more obvious effect on the continuous collapse resistance of structures than other frame columns. The maximum Interstory displacement Angle of L-shaped RC frame structure calculated by PKPM in six Plain Cylindrical layout forms is less than the limit of 1 / 550 specified in the Code, and the minimum maximum Interlayer displacement of the structure The minimum displacement ratio of the floor with the displacement angle of scheme VI. X is the first scheme. The minimum value of the interstory displacement ratio equal to 1.03y is scheme 6, and its value is 1.18, all of which meet the limit of 1.2 specified in the code. That is to say, the model selected in this paper meets the requirements of code and design. 3. Through SAP2000 finite element software, six kinds of cylindrical layout are analyzed against continuous collapse. When the top corner column of scheme one and three and the top and bottom corner column of scheme two fail, The displacement value exceeds the limit specified in the code, that is, the structure will collapse and destroy continuously. For the failure of other pseudo-failure columns, the displacement of the failure node will appear at a gentle stage, that is, after the structure has been redistributed by internal force, Will form a new balance system .4 based on the sensitivity coefficient of each component of the structure as the criterion, The effects of six types of column layout on the continuous collapse resistance of structures are compared and analyzed. The order of the different plane corner column layout in the L-shaped frame structure to improve the continuous collapse resistance is as follows: scheme six, scheme four, and so on. Options V, I, III, II. That is to say, when the structure plane corner cylinder network is arranged uniformly in both directions, it can make the structure have better ability to resist continuous collapse.
【學(xué)位授予單位】:西南石油大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TU375.4
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