本文選題：鋼框架　切入點(diǎn)：連續(xù)倒塌　出處：《西安工業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著我國經(jīng)濟(jì)的高速發(fā)展,對建筑結(jié)構(gòu)也提出了更高的要求,其中鋼結(jié)構(gòu)被廣泛的應(yīng)用在大跨度及高層建筑中。結(jié)構(gòu)構(gòu)件在遭受偶然荷載破壞后,往往會導(dǎo)致結(jié)構(gòu)整體發(fā)生倒塌,結(jié)構(gòu)一旦發(fā)生倒塌,就會造成極其嚴(yán)重的后果,加之近些年來恐怖襲擊頻發(fā),公共基礎(chǔ)建筑已經(jīng)成為恐怖襲擊的首要目標(biāo),所以鋼框架結(jié)構(gòu)抗連續(xù)倒塌性能分析具有重要的理論意義和工程價(jià)值。本文介紹了英美歐三種規(guī)范指南,并對其中的荷載組合與判斷準(zhǔn)則進(jìn)行對比,結(jié)合我國的有關(guān)規(guī)范,利用SAP2000有限元軟件構(gòu)建了 9層6×5跨鋼框架模型,采用備用荷載路徑法(簡稱APM法),分別對空間鋼框架結(jié)構(gòu)以及空間鋼框架結(jié)構(gòu)中選取的一榀豎向鋼框架結(jié)構(gòu)進(jìn)行靜力分析和動力分析,最后將豎向平面鋼框架結(jié)構(gòu)和空間鋼框架結(jié)構(gòu)分析結(jié)果進(jìn)行對比,得出以下結(jié)論:(1)在豎向平面鋼框架結(jié)構(gòu)線性靜力分析中,去除中柱工況受損跨梁構(gòu)件首先在底層出現(xiàn)破壞,去除邊柱工況受損跨梁構(gòu)首先在二層出現(xiàn)破壞,且其余梁構(gòu)件破壞順序無明顯規(guī)律。(2)空間鋼框架結(jié)構(gòu)和豎向平面鋼框架結(jié)構(gòu)在進(jìn)行靜力分析需要考慮動力放大系數(shù)α,而動力放大系數(shù)α受初始荷載組合大小以及拆除工況的影響。(3)受損跨Pushdown分析中,結(jié)合構(gòu)件塑性鉸出現(xiàn)發(fā)展順序,空間鋼框架結(jié)構(gòu)發(fā)生倒塌首先破壞的構(gòu)件可以是受損跨的梁構(gòu)件或柱構(gòu)件,豎向平面鋼框架結(jié)構(gòu)發(fā)生倒塌首先破壞的構(gòu)件是受損跨的梁構(gòu)件。(4)非線性動力分析使用考慮結(jié)構(gòu)初始狀態(tài)的等效荷載瞬時(shí)加載法,豎向平面鋼框架結(jié)構(gòu)大于空間鋼框架結(jié)構(gòu)拆除柱子后剩余結(jié)構(gòu)的動力效應(yīng)。改變瞬時(shí)加載時(shí)間,豎向平面鋼框架結(jié)構(gòu)和空間鋼結(jié)構(gòu)的動力效應(yīng)都會受到影響,且豎向平面鋼框架結(jié)構(gòu)受到的影響更大。(5)比較豎向平面鋼框架結(jié)構(gòu)和空間鋼框架結(jié)構(gòu)的非線性靜力分析與非線性動力分析,兩種結(jié)構(gòu)在拆除柱子后的內(nèi)力重分布的路徑是相同的,但空間鋼框架結(jié)構(gòu)的內(nèi)力重分布路徑更多。
[Abstract]:With the rapid development of economy in our country, higher requirements have been put forward to the building structure, in which steel structure has been widely used in long-span and high-rise buildings.After the structural members are damaged by accidental loads, they often lead to the collapse of the whole structure. Once the structure collapses, it will cause extremely serious consequences. In addition, in recent years, the terrorist attacks occur frequently.Public foundation building has become the primary target of terrorist attack, so the analysis of continuous collapse resistance of steel frame structure has important theoretical significance and engineering value.This paper introduces three kinds of code guides in Anglo-American and European countries, and compares the load combination and judgment criteria among them. Combined with the relevant codes of our country, a 9-story 6 脳 5 span steel frame model is constructed by using SAP2000 finite element software.The static and dynamic analysis of spatial steel frame structure and one vertical steel frame structure selected in space steel frame structure are carried out by the method of standby load path (APM).Finally, the analysis results of vertical plane steel frame structure and spatial steel frame structure are compared, and the following conclusion is drawn: in the linear static analysis of vertical plane steel frame structure, the first failure of the damaged span beam member in the middle column condition occurs at the bottom.The damage to the cross beam structure under the condition of removing the side column is first destroyed on the second floor.Moreover, the failure sequence of other beam members is not obvious. 2) the dynamic magnification factor 偽 is considered in the static analysis of spatial steel frame structure and vertical plane steel frame structure, while the dynamic magnification factor 偽 is subjected to the initial load combination size, and the dynamic magnification factor 偽 is considered in the static analysis of the vertical plane steel frame structure.In Pushdown analysis of damage span,Combined with the development sequence of plastic hinge of the member, the first failure member of the spatial steel frame structure may be the beam member or column member with damaged span.Nonlinear dynamic analysis of beam member with damaged span when the vertical plane steel frame structure collapses first, the equivalent load instantaneous loading method considering the initial state of the structure is used in the nonlinear dynamic analysis.The dynamic effect of vertical plane steel frame structure is greater than that of space steel frame structure after the column is removed.The dynamic effect of vertical plane steel frame structure and space steel structure will be affected by changing the instantaneous loading time.And the vertical plane steel frame structure is more affected than the vertical plane steel frame structure and the spatial steel frame structure, the nonlinear static analysis and the nonlinear dynamic analysis are compared between the vertical plane steel frame structure and the spatial steel frame structure.The internal force redistribution paths of the two structures after removing the columns are the same, but the internal force redistribution paths of the spatial steel frame structures are more than those of the spatial steel frame structures.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU391

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 舒興平;王光超;袁智深;盧倍嶸;;斜支撐對裝配式鋼框架抗連續(xù)倒塌性能的影響分析[J];建筑結(jié)構(gòu);2016年13期

2 陳昌宏;朱彥飛;姚堯;黃鶯;;基于位移性能的鋼框架-支撐結(jié)構(gòu)連續(xù)性倒塌Pushdown分析[J];建筑結(jié)構(gòu);2016年06期

3 于曉輝;錢凱;呂大剛;;豎向加載模式對結(jié)構(gòu)連續(xù)倒塌Pushdown分析的影響[J];建筑結(jié)構(gòu)學(xué)報(bào);2015年S2期

4 張正洋;孫巍巍;董浩林;蔣慷;趙志強(qiáng);;爆炸荷載作用下RC結(jié)構(gòu)連續(xù)倒塌研究[J];低溫建筑技術(shù);2015年11期

5 趙同陽;殷福新;;鋼框架抗連續(xù)倒塌設(shè)計(jì)方法研究[J];低溫建筑技術(shù);2015年07期

6 杜永峰;包超;宋翔;張尚榮;謝麗;;結(jié)構(gòu)抗連續(xù)倒塌魯棒性簡化分析方法研究[J];西安建筑科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2015年02期

7 潘毅;王初，

本文編號：1703484