本文選題：樓梯　切入點(diǎn)：框架結(jié)構(gòu)　出處：《華中科技大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：在傳統(tǒng)的框架結(jié)構(gòu)設(shè)計(jì)中，結(jié)構(gòu)工程師習(xí)慣于把框架結(jié)構(gòu)和樓梯分開進(jìn)行設(shè)計(jì)，在樓梯處開洞，將豎向荷載傳遞到周邊框架構(gòu)件。但是在多次地震中，作為救生通道的樓梯間及其相關(guān)構(gòu)件卻往往遭受嚴(yán)重破壞，從而失去了其應(yīng)有的作用。 在框架承受地震荷載作用時(shí)，將樓梯與整體結(jié)構(gòu)的相互作用考慮其中，不僅會使結(jié)構(gòu)的局部剛度變大，而且對結(jié)構(gòu)的自振特性、位移變形和受力情況都會產(chǎn)生較為明顯的影響。 為了研究樓梯構(gòu)件對主體結(jié)構(gòu)地震響應(yīng)的影響，本文建立了兩個(gè)框架模型。一個(gè)模型為傳統(tǒng)設(shè)計(jì)模型，即在樓梯間處開洞，用來模擬不考慮樓梯的抗震作用；另一個(gè)為完整包含樓梯間構(gòu)件的模型，來模擬樓梯參與框架結(jié)構(gòu)抗震作用。用SAP2000軟件對兩個(gè)模型進(jìn)行模態(tài)分析和反應(yīng)譜分析，對模型的動力特性和地震響應(yīng)的計(jì)算結(jié)果進(jìn)行對比分析。 研究結(jié)果表明：樓梯的加入增大框架結(jié)構(gòu)的整體剛度，結(jié)構(gòu)周期減小，亦使基底剪力有部分增大；樓梯的加入增大框架結(jié)構(gòu)的抗側(cè)剛度，結(jié)構(gòu)的最大節(jié)點(diǎn)位移，，最大層間位移均有減小，是一種有利影響；樓梯在地震作用下的與框架結(jié)構(gòu)的相互作用明顯，受力情況發(fā)生了較為顯著的變化。
[Abstract]:In the traditional frame structure design, the structural engineer is used to separate the frame structure from the staircase, open the hole in the staircase, transfer the vertical load to the surrounding frame member, but in many earthquakes, The stairwell and its related components are often severely damaged, thus losing its proper function. When the frame is subjected to earthquake load, considering the interaction between staircase and the whole structure, not only the local stiffness of the structure will be increased, but also the natural vibration characteristics of the structure will be increased. Displacement, deformation and stress will have a more obvious impact. In order to study the influence of staircase members on the seismic response of the main structure, two frame models are established in this paper. One is the traditional design model, that is, opening holes in the staircase, which is used to simulate the seismic action without considering the staircase. The other is a complete model which includes the components between stairs to simulate the seismic behavior of the frame structure. The modal analysis and response spectrum analysis of the two models are carried out with SAP2000 software. The dynamic characteristics of the model and the calculated results of seismic response are compared and analyzed. The results show that the addition of stairs increases the overall stiffness of the frame structure, reduces the period of the structure and partially increases the base shear force, and increases the lateral stiffness of the frame structure and the maximum node displacement of the frame structure with the addition of the staircase. The maximum interstory displacement is reduced, which is a favorable influence, and the interaction between the stair and the frame structure is obvious under earthquake, and the stress is changed obviously.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU311.3

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