【摘要】：隨著我國地鐵建設的快速發(fā)展,換乘地鐵車站的應用越來越重要,其中以交叉節(jié)點換乘車站最為方便快捷。與通道換乘相比,換乘時可以節(jié)省大量的步行時間。這種方便的換乘形式需要復雜的交叉地下結構來支持。所以,對交叉換乘車站的地震響應和損傷分析的研究具有重要的現(xiàn)實意義和工程應用價值。本文以T型交叉換乘地鐵車站結構為研究背景,考慮土-結構相互作用,基于通用有限元軟件ABAQUS,建立數(shù)值分析模型,并考慮粘彈性人工邊界,輸入水平作用的地震動,研究結構的地震響應和損傷發(fā)展趨勢。車站結構采用混凝土損傷塑性模型,利用損傷因子來描述混凝土在循環(huán)荷載下的非線性與疲勞性,考慮了地震前的初始應力場和結構的阻尼效應,并用自編的自動施加粘彈性邊界單元的程序對模型施加粘彈性單元,以等.效應力的形式輸入地震動,對土-交叉車站結構相互作用系統(tǒng)地進行了地震過程的非線性數(shù)值模擬。將EL Centro波、Kobe波兩種波形的地震波和均勻、非均勻兩種不同的地層相結合,分四種情況對交叉車站結構在地震作用下的損傷發(fā)展趨勢進行了詳細的對比和分析,得出了該種結構可能發(fā)生的損傷過程;分析了車站交叉處的獨立三層結構和兩層標準段結構的地震響應特性,并與相互作用時的地震響應特定進行了對比,結果表明兩種情況下的地震響應具有很大的差別,需要在考慮相互作用的基礎上進行地鐵結構設計。
[Abstract]:With the rapid development of subway construction in our country, the application of transfer subway station is becoming more and more important, among which the crossing node transfer station is the most convenient and fast. Compared with the passage transfer, the transfer can save a lot of walking time. This convenient form of transfer requires complex cross-over structures to support it. Therefore, the study of seismic response and damage analysis of interchange stations has important practical significance and engineering application value. In this paper, a numerical analysis model based on the general finite element software ABAQUS, is established with the T-type cross-transfer subway station structure as the research background, considering the soil-structure interaction, and considering the viscoelastic artificial boundary and the input horizontal ground motion. The development trend of seismic response and damage of structures is studied. The concrete damage plastic model is used to describe the nonlinear and fatigue behavior of concrete under cyclic load. The initial stress field before the earthquake and the damping effect of the structure are considered. The viscoelastic element is applied to the model by the program of automatic application of viscoelastic boundary element. The nonlinear numerical simulation of the soil-crossing station structure interaction is carried out in the form of the effect force input ground motion. Combining the seismic waves of EL Centro wave and Kobe wave with uniform and non-uniform layers, the damage development trend of cross station structure under earthquake action is compared and analyzed in detail in four cases. The possible damage process of this kind of structure is obtained. The seismic response characteristics of the independent three-story structure and the two-story standard section structure at the intersection of the station are analyzed and compared with the specific seismic response under the interaction. The results show that the seismic response of the two cases is very different. The subway structure design needs to be carried out on the basis of considering the interaction.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：U231.4;TU93

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