本文關(guān)鍵詞： 剪力墻結(jié)構(gòu) 樓梯 抗震 動(dòng)力特性 高層　出處：《西安工業(yè)大學(xué)》2013年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：本論文主要通過(guò)在有限元分析軟件中建立兩種樓梯參與結(jié)構(gòu)整體工作的模型,對(duì)比分析了樓梯對(duì)高層剪力墻結(jié)構(gòu)抗震性能的影響.現(xiàn)實(shí)的設(shè)計(jì)中,樓梯往往沒(méi)有參與結(jié)構(gòu)整體工作,通常做法都沒(méi)有考慮樓梯的剛度,僅僅考慮了其豎向增大荷載。從而忽略了地震作用對(duì)其的影響。歷次的震害都出現(xiàn)了樓梯不同程度的破壞,甚至出現(xiàn)主體未倒而樓梯先壞的情況,導(dǎo)致作為唯一逃生通道的樓梯完全失去了其功能,釀成了本可避免的悲劇,因此,研究樓梯在地震中抗震性能具有重要的現(xiàn)實(shí)意義。據(jù)此原因,我參與了導(dǎo)師的基金項(xiàng)目：陜西省科技廳《地震作用下樓梯參與結(jié)構(gòu)整體計(jì)算的仿真分析》(2010K01-073)的研究。本文主要研究其一個(gè)分支——地震作用下樓梯對(duì)剪力墻結(jié)構(gòu)抗震性能的影響分析。研究的主要內(nèi)容為：利用有限元結(jié)構(gòu)分析軟件Etabs建立模型,對(duì)一實(shí)際工程進(jìn)行有限元分析。對(duì)模擬的計(jì)算結(jié)果進(jìn)行對(duì)比,研究樓梯對(duì)高層剪力墻結(jié)構(gòu)抗震性能的影響。研究的方法為：利用Etabs軟件,分別建立：(1)按Etabs建模通用作法將樓梯定義為opening板的模型。(2)根據(jù)實(shí)際情況將剪刀梯按斜板(slab)輸入的模型。分別采用振型分解反應(yīng)譜法、時(shí)程分析法,對(duì)多個(gè)模型進(jìn)行地震作用下的內(nèi)力計(jì)算。通過(guò)對(duì)周期,樓層位移,剛度等的計(jì)算結(jié)果的對(duì)比得出結(jié)論。分析樓梯對(duì)高層剪力墻結(jié)構(gòu)動(dòng)力特性及整體受力性能的影響。主要結(jié)論：1、考慮樓梯參與結(jié)構(gòu)整體受力后,結(jié)構(gòu)的自振周期減小。2、由于樓梯梯板在水平力作用下具有“斜撐”的受力狀態(tài),在水平地震作用下,將產(chǎn)生較大軸向應(yīng)力；樓梯板由原先我們只考慮豎向力時(shí)的受彎構(gòu)件,轉(zhuǎn)變?yōu)椤皦簭潯⒗瓘潯睒?gòu)件,受力狀態(tài)復(fù)雜化。3、考慮樓梯參與空間結(jié)構(gòu)分析后,樓梯間處的水平抗側(cè)剛度增大,結(jié)構(gòu)整體的水平抗側(cè)剛度分布將跟著增大。故在水平地震作用下,樓梯間分配到的水平剪力較其它處明顯偏大。最大位移、層問(wèn)位移和層間位移角減小。4、樓梯構(gòu)件在地震作用下的受力狀態(tài)越簡(jiǎn)單,對(duì)于保護(hù)樓梯構(gòu)件將越有利；樓梯作為重要疏散通道的作用將得到保存,形成一個(gè)“安全島”。
[Abstract]:In this paper, through the finite element analysis software to establish two kinds of stair to participate in the overall work of the structure model, compared and analyzed the staircase to the high-rise shear wall structure seismic performance. In the actual design. Stairs often do not participate in the overall work of the structure, usually do not consider the stiffness of the staircase. It only considers its vertical increasing load, thus neglecting the influence of earthquake action on it. The damage of every earthquake appears the damage of staircase to varying degrees, even the main body is not inverted and the staircase is damaged first. The staircase as the only escape way has completely lost its function, resulting in a tragedy that could be avoided. Therefore, the study of the seismic behavior of the staircase in the earthquake has important practical significance. I participated in the teacher's fund project: Shaanxi Provincial Science and Technology Department < Simulation Analysis of overall calculation of stairs participating in structure under earthquake Action "2010 K01-073). This paper mainly studies the influence of staircase on seismic behavior of shear wall structure under the action of earthquake. The main content of the study is: the finite element structural analysis software Etabs is used to establish the model. Finite element analysis is carried out on a practical project. The effect of staircase on seismic performance of high-rise shear wall structure is studied by comparing the calculated results of simulation. The research method is as follows: using Etabs software. (1) A model that defines the staircase as a opening board according to the general method of Etabs modeling.) according to the actual situation, the scissors ladder is defined by the inclined plate. The input model. The mode decomposition response spectrum method is used respectively. Time history analysis method is used to calculate the internal force of multiple models under earthquake action. The influence of staircase on the dynamic characteristics and overall mechanical performance of high-rise shear wall structure is analyzed. The main conclusion is: 1, considering the staircase participation in the overall force of the structure. The natural vibration period of the structure is reduced by. 2. Because the staircase ladder has the force state of "oblique bracing" under the action of horizontal force, the axial stress will be larger under the action of horizontal earthquake. The stair plate is changed from the bending member when we only consider the vertical force to the "bending, tension and bending" component, and the stress state is complicated. 3. After considering the staircase participating in the analysis of spatial structure. With the increase of horizontal lateral stiffness, the lateral stiffness distribution of the whole structure will increase with the increase of horizontal lateral stiffness. Therefore, under horizontal earthquake, the distribution of horizontal shear force between staircases is obviously larger than that of other places, and the maximum displacement is obtained. The easier the stair members are subjected to earthquake, the easier it is to protect the stair members by decreasing the displacement of floor and the angle of displacement between floors. The role of stairs as an important evacuation passage will be preserved to form a "safe island".
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TU973.16;TU973.31

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本文編號(hào)：1444926