本文關(guān)鍵詞： 平面不規(guī)則結(jié)構(gòu) 防震縫 時程分析 自振周期 層間位移角 地震波　出處：《長沙理工大學》2013年碩士論文　論文類型：學位論文

【摘要】：由于建筑場地的限制、功能和建筑形式的美觀要求，建筑的平面布置不可避免的形成不規(guī)則形狀。在實際工程中對于平面不規(guī)則結(jié)構(gòu)的處理方法通常是設(shè)置防震縫將其劃分成幾個較規(guī)則的單元結(jié)構(gòu)�？墒窃跉v次地震災害中，防震縫的設(shè)置引起的災害屢見不鮮，特別是中國發(fā)生時間最近的一次汶川大地震的震害啟發(fā)我們思考：防震縫的設(shè)置對結(jié)構(gòu)抗震性能有何影響。目前，對防震縫的研究不多且尚淺，僅僅局限于對防震縫的理論分析，還有一些學者從具體工程實例出發(fā)探討防震縫的設(shè)置對結(jié)構(gòu)的影響。本文采用彈性動力時程分析方法對不同抗震設(shè)防烈度、不同不規(guī)則平面形式、不同層高的設(shè)置防震縫與不設(shè)置防震縫的算例模型進行比較，分析防震縫的設(shè)置對RC框架抗震性能的影響。因此，本文的研究內(nèi)容具有重要的理論意義和實際工程價值。 論文首先介紹了國內(nèi)外對平面不規(guī)則結(jié)構(gòu)的定義以及對防震縫寬度的規(guī)定，，綜述了我國規(guī)范對防震縫規(guī)定的進展以及對確定防震縫寬度的研究概況，通過分析指出防震縫的利與弊以及防震縫寬度的影響因素。在綜述了地震作用的計算分析方法和不規(guī)則建筑的抗震設(shè)計方法的基礎(chǔ)上，利用MIDAS/GEN有限元分析程序，采用反應譜分析方法以及彈性時程分析方法對所選的算例模型進行計算分析。在綜述地震動的三要素以及地震波的選擇方法的基礎(chǔ)上，確定選用El Centro波、Northridge波、Sanfernado波分別從X方向和Y方向?qū)λ憷Ｐ瓦M行激勵。分析比較三條地震波兩個方向作用下算例模型的自振周期、層間位移角、鋼筋用量三個指標的結(jié)果，得出以下結(jié)論：①平面凹進尺寸與相應投影方向總尺寸之比小于0.3時，5層、8層、10層、13層設(shè)縫結(jié)構(gòu)的層間位移角較不設(shè)縫結(jié)構(gòu)的層間位移角大。②平面凹進尺寸與相應投影方向總尺寸之比大于0.3時，5層設(shè)縫結(jié)構(gòu)的層間位移角小于不設(shè)縫結(jié)構(gòu)的層間位移角。③平面凹進尺寸與相應投影方向總尺寸之比大于0.3時，8層、10層、13層設(shè)縫結(jié)構(gòu)的層間位移角大于不設(shè)縫結(jié)構(gòu)的層間位移角。
[Abstract]:Due to the limitations of the construction site, the aesthetic requirements of the function and the form of the building, The plane arrangement of the building inevitably forms an irregular shape. In practical engineering, the method of dealing with the plane irregular structure is usually to set up seismic joints to divide it into several more regular element structures. However, in the past earthquake disasters, The disasters caused by the installation of anti-seismic joints are common, especially the earthquake damage caused by the recent Wenchuan earthquake in China, which inspired us to think: how does the installation of the anti-seismic joints affect the seismic performance of the structure. There are few and shallow researches on seismic joints, which are limited to the theoretical analysis of seismic joints. Some scholars also discuss the influence of the installation of seismic joints on the structure from concrete engineering examples. In this paper, the elastic dynamic time-history analysis method is applied to different seismic fortification intensity and irregular plane form. In this paper, the influence of seismic joints on the seismic behavior of RC frames is analyzed by comparing the numerical models with or without seismic joints. Therefore, the research content of this paper has important theoretical significance and practical engineering value. This paper first introduces the definition of plane irregular structures at home and abroad and the stipulations on the width of seismic joints, and summarizes the progress of the regulations on seismic joints in our country and the research situation of determining the width of seismic joints. This paper points out the advantages and disadvantages of the anti-seismic joint and the influencing factors of the width of the anti-seismic joint. On the basis of summarizing the calculation and analysis method of seismic action and the seismic design method of irregular building, the MIDAS/GEN finite element analysis program is used. Response spectrum analysis method and elastic time history analysis method are used to calculate and analyze the selected example model. On the basis of summarizing the three elements of ground motion and the selection method of seismic wave, It is determined that El Centro wave Northridge wave and Sanfernado wave are used to excite the model from X direction and Y direction respectively. The results of three indexes of natural vibration period, interlayer displacement angle and steel bar content under the action of three seismic waves in two directions are analyzed and compared. The following conclusions are drawn: when the ratio of the plane concave dimension to the total dimension of the corresponding projection direction is less than 0.3, the interlayer displacement angle of the jointed structure is larger than that of the non-jointed structure. 2. 2. 2 plane concave dimensions and corresponding dimensions are obtained. When the ratio of total dimension of projection direction is greater than 0.3, the interlayer displacement angle of five-story jointed structure is smaller than that of non-jointed structure. 3 plane concave dimension is larger than that of corresponding projection direction when the ratio of total dimension of projection direction is greater than 0.3, there are 10 layers and 13 layers with joint when the ratio of total dimension of projection direction is greater than 0.3. The interstory displacement angle of the structure is larger than that of the non-jointed structure.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU375.4;TU352.11

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