【正文】
ent, the article uses a Nonlinear Static timehistory analysis on a frame structure by the finite element analysis software of SAP2022, at last, obtains the top displacement and the nterstory drifts angle.(1)In this paper, establish the resilience model between joint shear force and joint shear deformation and the calculation formula of joint parameters, and which is applied in chapter IV which defines the joint spring.(2)The first attempt to apply this joint “macro model” to the overall frame. And the calculation method of axial stiffness of the spring in this “macro model” is proposed in this page. (3)The article uses a timehistory analysis on two frame structures of joint shear deformation and no joint shear deformation by the software of SAP2022. The calculation results have been got by changing the maximum seismic acceleration parameters and the joint parameters. The parative analysis show that the Software results and the law above mentioned of various factors of joint shear deformation is essentially the same.(4)The impact of joint shear deformation on the overall frame depends on the Seismic level. The effect will be increased with the increasement of the earthquake.KEY WORDS:beamcolumn joint, macro model, resilience curve, shear deformation, semirigid, time history analysis目 錄第一章 緒論 .......................................1 節(jié)點(diǎn)破壞綜述 ...................................................1 國(guó)內(nèi)外節(jié)點(diǎn)研究概況 [1][6][10] .......................................2 節(jié)點(diǎn)剪切變形研究的目的和意義 ...................................4 目前節(jié)點(diǎn)研究存在的問(wèn)題 [1][10].....................................5 本文研究的主要問(wèn)題和所采用的方法 ...............................6第二章 框架節(jié)點(diǎn)抗剪機(jī)理 ...........................8 節(jié)點(diǎn)核心區(qū)剪力傳遞機(jī)制 [4][10].....................................8 鋼筋混凝土框架節(jié)點(diǎn)剪切變形的影響因素 [1][3][10][11] ..................13 節(jié)點(diǎn)核心區(qū)的受力性能與破壞過(guò)程 [1][3][4][11].........................18 節(jié)點(diǎn)剪切失效形式與破壞方式 [5][10] ................................19 節(jié)點(diǎn)失效方式 ..............................................19 節(jié)點(diǎn)受力特征與剪切失效形式 ...............................23 節(jié)點(diǎn)的強(qiáng)度和延性要求 .....................................24第三章 節(jié)點(diǎn)核心區(qū)的剪切變形 ......................26 框架節(jié)點(diǎn)的受力 [10][11] ...........................................26 節(jié)點(diǎn)剪切變形 [1][11]..............................................27 現(xiàn)有節(jié)點(diǎn)模型分析 [18][22][26][28][34] ..................................29 本文節(jié)點(diǎn)的恢復(fù)力模型 [30][26][23][28].................................32 本文建立的節(jié)點(diǎn)恢復(fù)力模型 .................................32 本文節(jié)點(diǎn) V?恢復(fù)力模型假定 [9]..............................32 節(jié)點(diǎn)模型參數(shù) [10][11][12][21][24][29][38] ..........................34第四章 考慮節(jié)點(diǎn)剪切變形的整體框架分析 ............40 本文節(jié)點(diǎn)核心區(qū)剪切變形的分析模型 ..............................40 SAP2022 有限元分析軟件簡(jiǎn)介 ....................................43 半剛性混凝土框架的動(dòng)力非線性分析(時(shí)程分析方法) ..............43 模型建立及相關(guān)問(wèn)題 ............................................44 彈簧滯回模型的定義 .......................................45 本文所采用地震波的選用 ...................................46 框架模型參數(shù) .............................................47 節(jié)點(diǎn)剪切變形影響因素分析 ......................................51 軸壓比對(duì)節(jié)點(diǎn)核心區(qū)剪切變形的影響 .........................52 剪壓比對(duì)節(jié)點(diǎn)核心區(qū)剪切變形的影響 .........................56 本章分析結(jié)論 .............................................58結(jié)論與展望 .......................................591 本文的主要結(jié)論 .................................................592 有待進(jìn)一步研究的問(wèn)題 ...........................................59參考文獻(xiàn) .........................................61致 謝 ............................................64第一章 緒論 節(jié)點(diǎn)破壞綜述框架節(jié)點(diǎn)是框架結(jié)構(gòu)中不可缺少的一部分,所謂“框架節(jié)點(diǎn)” ,主要是指承重框架中的梁柱節(jié)點(diǎn)。(4)節(jié)點(diǎn)剪切變形對(duì)整體框架的影響大小與地震作用大小有關(guān),其隨地震作用的增大而增大。(3)利用有限元軟件 SAP2022 對(duì)考慮節(jié)點(diǎn)剪切變形和不考慮節(jié)點(diǎn)剪切變形的兩種框架進(jìn)行動(dòng)力分析,通過(guò)改變輸入最大地震加速度和節(jié)點(diǎn)單元參數(shù),最后得到了各種情況下的計(jì)算結(jié)果。主要結(jié)論和建議如下:(1)本文提出了符合節(jié)點(diǎn)實(shí)際剪切變形的節(jié)點(diǎn)力與變形的三線型恢復(fù)力模型和節(jié)點(diǎn)參數(shù)的計(jì)算公式,并將其應(yīng)用于第四章中節(jié)點(diǎn)彈簧的定義當(dāng)中。本文基于 Clough 雙線型恢復(fù)力模型和 Takeda 剛度退化三線型模型的基礎(chǔ)理論,提出了符合節(jié)點(diǎn)抗剪機(jī)理的節(jié)點(diǎn)剪力與剪切變形之間的三線型滯回曲線模型,并主要考慮了剪壓比、軸壓比、配箍特征值三個(gè)因素對(duì)節(jié)點(diǎn)剪切變形的影響,給出了節(jié)點(diǎn)在各個(gè)階段剪切剛度的計(jì)算公式。目前對(duì)鋼筋混凝土結(jié)構(gòu)抗震分析和計(jì)算時(shí),一般都假定節(jié)點(diǎn)是剛性的,實(shí)際上完全剛性的節(jié)點(diǎn)是不存在的,尤其是在罕遇地震作用下的框架結(jié)構(gòu)更是如此??蚣芄?jié)點(diǎn)的變形主要由節(jié)點(diǎn)的剪切變形和梁縱筋滑移所產(chǎn)生的轉(zhuǎn)角組成。本人離校后發(fā)表或使用學(xué)位論文或與該論文直接相關(guān)的學(xué)術(shù)論文或成果時(shí),署名單位仍然為長(zhǎng)安大學(xué)。論文作者簽名: 年 月 日論文知識(shí)產(chǎn)權(quán)權(quán)屬聲明本人在導(dǎo)師指導(dǎo)下所完成的論文及相關(guān)的職務(wù)作品,知識(shí)產(chǎn)權(quán)歸屬學(xué)校。本論文中不包含任何未加明確注明的其他個(gè)人或集體已經(jīng)公開(kāi)發(fā)表的成果。碩 士 學(xué) 位 論 文考慮節(jié)點(diǎn)剪切變形影響的鋼筋混凝土框架地震反應(yīng)分析導(dǎo)師姓名職稱申請(qǐng)學(xué)位級(jí)別 工學(xué)碩士 學(xué)科專業(yè)名稱 結(jié)構(gòu)工程論文提交日期 年 月 日 論文答辯日期 年 月 日學(xué)位授予單位 長(zhǎng)安大學(xué)答辯委員會(huì)主席學(xué)位論文評(píng)閱人Study on the Seismic Response of RC Framethat Consider the Joint Shear DeformationA Dissertation Submitted for the Degree of MasterCandidate:He XiliangSupervisor:Prof. Wu TaoChang’an University, Xi’an, China論文獨(dú)創(chuàng)性聲明本人聲明:本人所呈交的學(xué)位論文是在導(dǎo)師的指導(dǎo)下,獨(dú)立進(jìn)行研究工作所取得的成果。除論文中已經(jīng)注明引用的內(nèi)容外,對(duì)論文的研究做出重要貢獻(xiàn)的個(gè)人和集體,均已在文中以明確方式標(biāo)明。本聲明的法律責(zé)任由本人承擔(dān)。學(xué)校享有以任何方式發(fā)表、復(fù)制、公開(kāi)閱覽、借閱以及申請(qǐng)專利等權(quán)利。(保密的論文在解密后應(yīng)遵守此規(guī)定)論文作者簽名: 年 月 日導(dǎo) 師 簽 名: 年 月 日摘 要當(dāng)結(jié)構(gòu)處于彈性受力狀態(tài)時(shí),節(jié)點(diǎn)剪切變形所引起的變形在框架結(jié)構(gòu)整體變形中所占比例較小,但是當(dāng)框架結(jié)構(gòu)在地震作用下進(jìn)入彈塑性狀態(tài)時(shí),由節(jié)點(diǎn)變形所引起的變形在結(jié)構(gòu)整體變形中比重不容忽視,尤其是未經(jīng)過(guò)抗剪強(qiáng)度驗(yàn)算的或承受較大剪壓比的節(jié)點(diǎn)。而本文主要考慮節(jié)點(diǎn)剪切變形影響,對(duì)于節(jié)點(diǎn)滑移影響可通過(guò)對(duì)本節(jié)節(jié)點(diǎn)模型的剪切剛度修正來(lái)加以考慮。因此,在進(jìn)行鋼筋混凝土框架結(jié)構(gòu)地震反應(yīng)分析時(shí)考慮節(jié)點(diǎn)剪切變形的影響顯得很重要。根據(jù)以上節(jié)點(diǎn)單元模型分析,利用 SAP2022 有限元分析軟件對(duì)給定框架進(jìn)行彈塑性時(shí)程分析,得出框架結(jié)構(gòu)的層間位移角和頂點(diǎn)位移。(2)第一次嘗試把這種節(jié)點(diǎn)“宏模型”應(yīng)用于整體框架,并提出了“宏模型”中彈簧軸向剛度的計(jì)算方法。經(jīng)過(guò)對(duì)比分析可看出,軟件的計(jì)算結(jié)果與前面所述各因素影響節(jié)點(diǎn)剪切變形的規(guī)律基本相一致,證明本文提出模型單元的合理性和有效性。Comment [U1]: 將該行并入上一頁(yè)關(guān)鍵詞:梁柱節(jié)點(diǎn),宏模型,滯回曲線,剪切變形,半剛性,時(shí)程分析ABSTRACTThe deformation caused by shear deformation have a small proportion of the total deformation of structure when it is on elastic state, but have a large proportion when it is on elasticplastic state especially for the joints which don’t be checked for their seismic shear or endure high ratio of shear force to concrete pressive force.Beamcolumn Joint deformation contains shear deformation and slip of longitudinal reinforcement passing through joint. But in this paper shear deformation is mainly taken into account, and slip of longitudinal reinforcement passing through joint is considered just by modifying its rigid matrix of the joint shear element when its effect is important.At prese