本文選題：RC框架結構 + Pushover分析�。� 參考：《西南交通大學》2017年碩士論文

【摘要】：在地震發(fā)生的過程中,給人民的生命財產造成災害的最主要的根源是房屋建筑在地震作用下的嚴重破壞和倒塌。我國目前按照"兩階段三水準"的抗震設計準則,采用兩階段設計方法滿足不同水準的抗震設防要求。在計算地震作用時,以線彈性設計方法計算結構在多遇地震下的內力、位移,并用內力組合驗算構件截面以實現結構的功能需求。而地震倒塌計算一般只針對于少數重要性等級較高的建筑結構,對大量的一般建筑結構來說,其抗倒塌能力主要依賴整體結構的抗震概念設計和抗震構造措施,缺乏定量計算的方法和評價指標。因此,定量地研究結構在地震作用下的抗側向倒塌能力具有重要意義。本文基于Pushover方法,對嚴格按照我國規(guī)范設計的RC框架結構進行了抗側向倒塌能力的定量分析,具體內容如下:(1)嚴格按照我國現行抗震規(guī)范設計了 11個在不同抗震設防烈度下的5層和8層RC框架結構,利用有限元分析軟件SAP2000對各框架進行了 3種不同側向力加載模式下的Pushover分析。(2)利用分析得到的基底剪力-頂點位移曲線,從承載力儲備和變形能力兩個方面建立了結構整體超強系數、強屈比、延性系數和延展系數四個性能參數來定量分析結構的抗側向倒塌能力。(3)對比計算得到的性能參數,總結出了抗震設防烈度、層數對結構性能參數的影響,定量評價了各結構的抗側向倒塌能力。得到的結論有:不同側向力加載模式對結構的抗側向倒塌能力有較大影響;從總體趨勢來看,結構超強系數的平均值隨著結構抗震設防烈度的提高而減小;嚴格按我國規(guī)范設計的RC框架結構的超強系數最小值為1.3;在不同的抗震設防烈度下,各結構強屈比的平均值均不小于我國規(guī)范規(guī)定的鋼筋強屈比最小限值1.25;結構整體延性系數在3.8～5.3之間,延展系數在1.7～2.1之間。
[Abstract]:In the process of earthquake, the main source of disaster to people's life and property is the serious destruction and collapse of buildings under the action of earthquake.According to the criterion of "two-stage and three-level" seismic design, the two-stage design method is adopted to meet the requirements of seismic fortification at different levels in China.The linear elastic design method is used to calculate the internal force and displacement of the structure under the frequent earthquake, and the internal force is combined to calculate the section of the member in order to meet the functional requirements of the structure.But the calculation of earthquake collapse is usually aimed at a few building structures with high importance level. For a large number of general building structures, their ability to resist collapse mainly depends on the seismic conceptual design and seismic structural measures of the whole structure.Lack of quantitative calculation methods and evaluation indicators.Therefore, it is of great significance to quantitatively study the lateral collapse resistance of structures under earthquake.Based on the Pushover method, the lateral collapse resistance of RC frame structures designed in strict accordance with the code of our country is quantitatively analyzed in this paper.The concrete contents are as follows:) 11 RC frame structures with 5 or 8 stories under different seismic fortification intensity have been designed in strict accordance with the current seismic code of our country.Using the finite element analysis software SAP2000, the Pushover analysis of each frame under three different lateral loading modes is carried out. (2) the base shear-vertex displacement curve is obtained by using the analysis.From the two aspects of bearing capacity reserve and deformation capacity, the performance parameters of the whole structure are established to quantitatively analyze the lateral collapse resistance of the structure, such as the superstrength coefficient, the strong yield ratio, the ductility coefficient and the extension coefficient.The effects of seismic fortification intensity and the number of layers on the structural performance parameters are summarized and the lateral collapse resistance of each structure is quantitatively evaluated.The conclusions are as follows: different lateral force loading modes have great influence on the lateral collapse resistance of the structure, and the average value of the superstrength coefficient of the structure decreases with the increase of the seismic fortification intensity of the structure.The minimum value of superstrength coefficient of RC frame structure designed strictly according to the code of our country is 1.3. Under different seismic fortification intensity,The average strength to yield ratio of each structure is not less than the minimum limit of reinforcement strength to yield ratio of 1.25, the ductility coefficient of the whole structure is between 3.810 and 5.3, and the extension coefficient is between 1.7 and 2.1.
【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】：TU375.4

【參考文獻】

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1 潘毅;王初，

本文編號：1751278