本文選題：分體柱 + 分隔比　； 參考：《煙臺大學(xué)》2017年碩士論文

【摘要】：柱作為框架結(jié)構(gòu)的豎向承重構(gòu)件和抗水平側(cè)移構(gòu)件,在結(jié)構(gòu)的抗倒塌中起著非常關(guān)鍵的作用。在高層框架結(jié)構(gòu)或框剪結(jié)構(gòu)底部、轉(zhuǎn)換層以及樓梯間等位置,因軸壓比和層高的限制,多會形成剪跨比較小的短柱。歷次地震災(zāi)害調(diào)查表明短柱剛度較大,變形能力較差,地震中多發(fā)生脆性破壞。已有研究提出了分體柱技術(shù),即通過在柱體內(nèi)設(shè)置十字交叉的隔板,將柱體分割為4個獨立單元柱,在保證柱體軸壓比不變的同時,將柱體剪跨比增加一倍。分體柱技術(shù)使短柱的破壞形態(tài)由整體柱的脆性剪切破壞發(fā)展為單元柱的壓彎破壞,改變了短柱的破壞模式。本文在分體柱研究的基礎(chǔ)上針對目前分體柱的相關(guān)研究中,隔板寬度與柱截面寬度相同,導(dǎo)致柱體在地震或破壞過程中,在較小荷載時沿隔板出現(xiàn)豎向裂縫,導(dǎo)致單元柱間相對變形,承載力降低;而隔板尺寸變化與柱截面尺寸的關(guān)系對短柱受力性能的影響也未見相關(guān)研究,因此,本文設(shè)計了3個不同分隔比(隔板寬度與柱體截面的比值)的分體柱試件,通過進行恒定軸力作用下的擬靜力試驗,研究分隔比變化對分體柱受力性能的影響,研究成果為:(1)完成了3個不同分隔比分體柱試件在恒定軸力作用下的擬靜力試驗,得到了分體柱試件的破壞形態(tài)和破壞模式,結(jié)果表明:分隔比變化對分體柱的破壞過程和破壞模式影響較小,即不同分隔比的分體柱均發(fā)生壓彎破壞。(2)本文通過試驗得到了柱體破壞的具體數(shù)值,分析了各分體柱的滯回曲線、骨架曲線、承載能力、變形能力、剛度變化、鋼筋應(yīng)變等性能指標,研究結(jié)果表明:隨著分隔比的減小,分體柱的峰值承載力提高、延性降低、耗能能力減弱、剛度退化速率加快,表明分隔比是影響分體柱受力性能的重要因素。(3)運用有限元ABAQUS軟件建立了3個不同分隔比的分體柱模型,對各分體柱模型進行模擬計算,明晰了分隔比變化對分體柱的破壞模式、骨架曲線和承載力等指標的影響,對比試驗和模擬數(shù)據(jù)驗證了模型的準確性和合理性。
[Abstract]:Columns, as vertical load-bearing members and lateral displacement resistant members of frame structures, play a very important role in the collapse resistance of structures. At the bottom of the frame structure or the frame shear structure, the transition floor and the staircase, the short columns with small shear span will be formed because of the limit of axial compression ratio and story height. The investigation of previous earthquake disasters shows that the short columns have large stiffness, poor deformation capacity and brittle failure in earthquakes. The split-column technique has been put forward, that is, the column is divided into four independent columns by setting a cross-section in the column. The column shear span ratio is doubled while the axial compression ratio of the column is not changed. The failure mode of short columns is changed from brittle shear failure of integral columns to compression and bending failure of element columns, which changes the failure mode of short columns. In this paper, based on the research of split columns, the width of the diaphragm is the same as the width of the section of the column, which leads to vertical cracks along the diaphragm in the process of earthquake or failure, when the load is small. As a result of the relative deformation between the elements and the reduction of the bearing capacity, the relationship between the size change of the diaphragm and the section size of the column has not been studied on the behavior of the short column. In this paper, three split-column specimens with different separation ratios (the ratio of the diaphragm width to the column section) are designed. The influence of the variation of the separation ratio on the mechanical properties of the split column is studied by the quasi-static test under the constant axial force. The results are as follows: (1) the pseudostatic tests of three specimens with different separation ratios under the action of constant axial force have been completed, and the failure patterns and failure modes of the specimens have been obtained. The results show that the variation of the separation ratio has little effect on the failure process and failure mode of the split column, that is, the compressing and bending failure occurs in the split column with different separation ratios. (2) the concrete values of the column failure are obtained by experiments in this paper. The hysteretic curve, skeleton curve, load-carrying capacity, deformation capacity, stiffness change and strain of steel bar are analyzed. The results show that the peak bearing capacity increases and the ductility decreases with the decrease of separation ratio. The energy dissipation capacity is weakened and the stiffness degradation rate is accelerated, which indicates that the partition ratio is an important factor affecting the mechanical performance of the split column. (3) three split-column models with different separation ratios are established by using the finite element Abaqus software, and each split-column model is simulated and calculated. The influence of the variation of the separation ratio on the failure mode, skeleton curve and bearing capacity of the split column is clarified. The accuracy and reasonableness of the model are verified by comparing the test data with the simulation data.
【學(xué)位授予單位】：煙臺大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU973

【參考文獻】

相關(guān)期刊論文 前10條

1 金仁和;劉細林;;地震作用下鋼筋混凝土柱破壞形式及機理分析[J];茂名學(xué)院學(xué)報;2008年06期

2 李宏男;肖詩云;霍林生;;汶川地震震害調(diào)查與啟示[J];建筑結(jié)構(gòu)學(xué)報;2008年04期

3 林育新;;淺談鋼砼短柱的判別及避免出現(xiàn)短柱破壞的措施[J];福建建筑;2007年12期

4 宋義平;曹萬林;張建偉;王新杰;范燕飛;王志惠;;改善鋼筋混凝土短柱抗震性能的研究[J];世界地震工程;2007年01期

5 賈金青;姜睿;劉毅;肖紅;;纖維超高強混凝土框架短柱抗震性能的試驗研究[J];鐵道科學(xué)與工程學(xué)報;2006年05期

6 周曉潔;陳培奇;;碳纖維布加固鋼筋混凝土短柱抗剪承載力與延性的影響因素分析[J];天津城市建設(shè)學(xué)院學(xué)報;2006年03期

7 張國軍,呂西林;高軸壓比高強混凝土短柱力學(xué)性能的試驗研究[J];工業(yè)建筑;2005年03期

8 韋愛鳳;鋼筋混凝土短柱問題的處理[J];特種結(jié)構(gòu);2003年04期

9 郝永昶,李忠獻,袁文章,胡慶昌,徐云扉;分體柱隔板材料選擇與優(yōu)化的試驗研究[J];建筑結(jié)構(gòu);2003年12期

10 郝永昶,李忠獻,周煒,康谷貽,胡慶昌,徐云扉;鋼筋混凝土分體柱框架邊節(jié)點抗震性能的試驗研究[J];建筑結(jié)構(gòu);2002年10期

相關(guān)博士學(xué)位論文 前2條

1 馬穎;鋼筋混凝土柱地震破壞方式及性能研究[D];大連理工大學(xué);2012年

2 初明進;冷彎薄壁型鋼混凝土剪力墻抗震性能研究[D];清華大學(xué);2010年

相關(guān)碩士學(xué)位論文 前5條

1 李亞萍;混凝土分體柱側(cè)向剛度的簡化計算[D];長安大學(xué);2012年

2 馬愷澤;方鋼管高強混凝土柱抗震性能研究[D];內(nèi)蒙古科技大學(xué);2008年

3 董旭華;GFRP加固鋼筋混凝土橋梁短柱抗震性能研究[D];湖南大學(xué);2006年

4 黃曉宇;方鋼管混凝土柱抗震性能試驗研究[D];天津大學(xué);2004年

5 袁文章;分體柱隔板材料與施工工藝的試驗研究[D];天津大學(xué);2004年

，

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