本文選題：RC框架結(jié)構(gòu) + Pushover分析　； 參考：《西南交通大學(xué)》2017年碩士論文

【摘要】：在地震發(fā)生的過(guò)程中,給人民的生命財(cái)產(chǎn)造成災(zāi)害的最主要的根源是房屋建筑在地震作用下的嚴(yán)重破壞和倒塌。我國(guó)目前按照"兩階段三水準(zhǔn)"的抗震設(shè)計(jì)準(zhǔn)則,采用兩階段設(shè)計(jì)方法滿(mǎn)足不同水準(zhǔn)的抗震設(shè)防要求。在計(jì)算地震作用時(shí),以線(xiàn)彈性設(shè)計(jì)方法計(jì)算結(jié)構(gòu)在多遇地震下的內(nèi)力、位移,并用內(nèi)力組合驗(yàn)算構(gòu)件截面以實(shí)現(xiàn)結(jié)構(gòu)的功能需求。而地震倒塌計(jì)算一般只針對(duì)于少數(shù)重要性等級(jí)較高的建筑結(jié)構(gòu),對(duì)大量的一般建筑結(jié)構(gòu)來(lái)說(shuō),其抗倒塌能力主要依賴(lài)整體結(jié)構(gòu)的抗震概念設(shè)計(jì)和抗震構(gòu)造措施,缺乏定量計(jì)算的方法和評(píng)價(jià)指標(biāo)。因此,定量地研究結(jié)構(gòu)在地震作用下的抗側(cè)向倒塌能力具有重要意義。本文基于Pushover方法,對(duì)嚴(yán)格按照我國(guó)規(guī)范設(shè)計(jì)的RC框架結(jié)構(gòu)進(jìn)行了抗側(cè)向倒塌能力的定量分析,具體內(nèi)容如下:(1)嚴(yán)格按照我國(guó)現(xiàn)行抗震規(guī)范設(shè)計(jì)了 11個(gè)在不同抗震設(shè)防烈度下的5層和8層RC框架結(jié)構(gòu),利用有限元分析軟件SAP2000對(duì)各框架進(jìn)行了 3種不同側(cè)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(diǎn)位移曲線(xiàn),從承載力儲(chǔ)備和變形能力兩個(gè)方面建立了結(jié)構(gòu)整體超強(qiáng)系數(shù)、強(qiáng)屈比、延性系數(shù)和延展系數(shù)四個(gè)性能參數(shù)來(lái)定量分析結(jié)構(gòu)的抗側(cè)向倒塌能力。(3)對(duì)比計(jì)算得到的性能參數(shù),總結(jié)出了抗震設(shè)防烈度、層數(shù)對(duì)結(jié)構(gòu)性能參數(shù)的影響,定量評(píng)價(jià)了各結(jié)構(gòu)的抗側(cè)向倒塌能力。得到的結(jié)論有:不同側(cè)向力加載模式對(duì)結(jié)構(gòu)的抗側(cè)向倒塌能力有較大影響;從總體趨勢(shì)來(lái)看,結(jié)構(gòu)超強(qiáng)系數(shù)的平均值隨著結(jié)構(gòu)抗震設(shè)防烈度的提高而減小;嚴(yán)格按我國(guó)規(guī)范設(shè)計(jì)的RC框架結(jié)構(gòu)的超強(qiáng)系數(shù)最小值為1.3;在不同的抗震設(shè)防烈度下,各結(jié)構(gòu)強(qiáng)屈比的平均值均不小于我國(guó)規(guī)范規(guī)定的鋼筋強(qiáng)屈比最小限值1.25;結(jié)構(gòu)整體延性系數(shù)在3.8～5.3之間,延展系數(shù)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(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TU375.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 潘毅;王初，

本文編號(hào)：1751278