填充墻框架結構論文：填充墻在RC框架結構倒塌中的作用及防倒塌措施研究【中文摘要】結構設計的一個基本任務是保證結構安全,防止結構在偶然荷載或地震作用下發(fā)生倒塌是結構設計的一個重要方面。填充墻框架結構是一種實際應用較廣泛的結構形式,作為結構重要組成部分的填充墻,在以往的分析和設計中,只把其作為荷載或對其進行剛度折減。這種處理方法未能較好地反映填充墻與框架梁柱協(xié)同工作的機理及填充墻對框架結構的影響?；趯σ陨蠁栴}的考慮,本文按我國規(guī)范設計了4層、8層和12層鋼筋混凝土框架結構,分別從填充墻對框架結構抗連續(xù)倒塌和抗地震倒塌的影響兩方面進行了研究,并提出了相應的防倒塌措施。主要包括以下內容:1.本文利用ABAQUS軟件分別針對連續(xù)倒塌試驗、填充墻框架試驗、多層多跨框架結構荷載試驗、框-桁架結構試驗和多層填充墻框架結構進行了模型驗證。采用模型驗證中的材料本構、單元類型、接觸關系模型及參數(shù)的確定方法對設計的鋼筋混凝土框架結構進行了建模。2.基于備用荷載路徑法,采用非線性靜力分析、非線性動力分析及豎向增量動力分析方法對設計的帶填充墻和不帶填充墻的RC框架進行連續(xù)倒塌分析。從柱失效點的豎向位移、結構構件的內力變化、結構能量變化和結構的抗倒塌能力等方面研究了填充墻對框架結構的影響。3.利用時程分析方法分別對帶填充墻和不帶填充墻的框架進行了多遇地震和罕遇地震作用下的動力分析。以結構各層的加速度峰值、層間位移角、樓層位移、結構能量等為指標研究了填充墻對框架結構抗震性能的影響。研究發(fā)現(xiàn)底層薄弱填充墻框架結構在罕遇地震作用下容易發(fā)生倒塌。4.基于普通鋼支撐的防倒塌加固方法,利用不同支撐類型、不同支撐布置形式,分別針對純框架結構防連續(xù)倒塌和填充墻框架結構防地震倒塌進行了研究。結果表明合理布置支撐能較好地提高結構的抗倒塌能力?！居⑽恼緼 basic task of structural design is to ensure the safety of buildings, and one of the significant aspects in structural design is to prevent the structure from col-lapse under the loads of accidenttal event or earthquake. Infilled frame structure is a widely used structure type in practical application. As an important part of the structure, the infilled wall is only taken as a load or reduced by its stiffness in the usual analysis and design. But these handling methods cannot well reflect the mechanism of cooperative work between the infilled wall and frame structures beams or columns and the effect of the inflled wall on the frame structure. Based on the above issues, a 4-story, a 8-story and a 12-story reinforced concrete frame structures are designed according to Chinese codes. The infilled wall effects on frame structure to resist progressive collapse and seismic collapse are studied, and the corresponding anti-collapse measures are proposed. The main contents are as follows.1. ABAQUS software is used to verify progressive collapse test, infilled wall frame test, multi-story and multi-span frame structure test, frame-truss test and multi-story infilled frame test. The reinforced concrete frame structures are modeled with constitutive relation of the materials, element type , contact relation model and determination methods of their parameters which adopted in model verification.2. Based on alternate load path method, with and without infilled wall RC frame are analyzed with nonlinear static analysis method, nonlinear dynamic analysis method and vertical incremental dynamic analysis method. The effect of infilled walls on infilled frame is studied from the following aspects: vertical displacement of collumn failure point, change of the internal forces of structural members, energy of the structure and structural anti-collapse capacity.3. Based on time history analysis method, with and without infilled wall frame are analyzed under frequently occurred earthquake and rare earthquake. The effect of infilled walls on frame is studied by the following indexes: story peak acceleration, story drift, floor displacement and energy of the structure. By the above study it can be found that RC frame structures with weakness story at bottom are liable to collapse under rare earthquake.4. Based on the anti-collapse method of common steel brace, anti-collapse of pure frame structure and seismic collapse of infilled frame structure are studied using different types and different layouts of brace respectively. The results show that rational layout of structural brace can better improve the structural anti-collapse capabilities.【關鍵詞】填充墻框架結構 模型驗證 連續(xù)倒塌 地震倒塌 防倒塌措施【英文關鍵詞】infilled frame structure model vadidation progressive collapse seismic collapse anti-collapse measures【目錄】填充墻在RC框架結構倒塌中的作用及防倒塌措施研究摘要4-5Abstract5-6第1章 緒論10-201.1 課課題背景及研究目的和意義101.2 連續(xù)倒塌研究現(xiàn)狀10-151.2.1 連續(xù)倒塌的標志性事件11-121.2.2 國外研究現(xiàn)狀12-141.2.3 國內研究現(xiàn)狀14-151.3 填充墻框架抗震性能研究現(xiàn)狀15-181.3.1 國外研究現(xiàn)狀15-171.3.2 國內研究現(xiàn)狀17-181.4 課題來源181.5 本文主要研究內容18-20第2章 基于ABAQUS 的建模及模型驗證20-362.1 引言202.2 材料模型及取值20-232.2.1 鋼筋模型202.2.2 混凝土模型20-222.2.3 填充墻材料模型22-232.3 有限元模型驗證23-302.3.1 連續(xù)倒塌試驗模型驗證24-262.3.2 填充墻試驗模型驗證26-282.3.3 多層多跨框架結構模型驗證28-292.3.4 框-桁架結構及多層填充墻框架結構模型驗證29-302.4 結構模型及分析方法30-342.4.1 結構模型30-322.4.2 分析方法32-332.4.3 荷載取值33-342.4.4 阻尼342.5 本章小結34-36第3章 連續(xù)倒塌中填充墻的作用研究36-523.1 引言36-373.2 結構非線性動力響應37-463.2.1 柱失效時間對框架結構動力效應的影響37-383.2.2 柱失效點的豎向位移38-393.2.3 柱失效后內力分析39-423.2.4 能量變化42-463.3 結構非線性靜力響應46-483.4 結構抗倒塌能力曲線分析48-513.4.1 填充墻對結構抗倒塌能力曲線的影響483.4.2 填充墻厚度對結構抗倒塌能力曲線的影響48-493.4.3 樓層數(shù)對結構抗倒塌能力曲線的影響49-513.4.4 柱失效位置對結構抗倒塌能力曲線的影響513.5 本章小結51-52第4章 地震倒塌中填充墻的作用研究52-714.1 引言524.2 地震動選取52-534.3 多遇地震下結構動力響應分析53-614.3.1 加速度時程對比53-554.3.2 位移時程對比55-564.3.3 層間位移及層間位移角對比56-574.3.4 樓層位移對比57-584.3.5 能量反應分析及對比58-614.4 罕遇地震下結構動力響應分析61-694.4.1 加速度時程對比61-634.4.2 位移時程對比63-654.4.3 層間位移及層間位移角對比65-664.4.4 樓層位移對比66-674.4.5 能量反應分析及對比67-694.5 本章小結69-71第5章 基于鋼支撐的防倒塌措施初步研究71-925.1 引言71-72