發(fā)布時(shí)間：2018-05-06 19:31

  本文選題：屈曲約束支撐 + 純鋼　； 參考：《中國地震局工程力學(xué)研究所》2017年碩士論文

【摘要】：屈曲約束支撐軸向受壓或受拉均能達(dá)到屈服而不發(fā)生屈曲,與傳統(tǒng)普通支撐相比,其良好的滯回耗能性能及穩(wěn)定的力學(xué)性能越來越受到工程師的追捧,且其施工安裝方便、經(jīng)濟(jì)、設(shè)計(jì)靈活、不影響主體結(jié)構(gòu)美觀等優(yōu)點(diǎn),使得屈曲約束支撐不僅是新建建筑物抗震設(shè)計(jì)的首要選擇之一,也是已建成建筑物抗震加固和改造的重要手段。本文采用Q235B與工業(yè)純鐵作為內(nèi)芯板材研發(fā)了一種經(jīng)濟(jì)型較好的新型純鋼屈曲約束支撐,結(jié)合擬靜力試驗(yàn)和有限元數(shù)值模擬對(duì)其耗能性能進(jìn)行了初步研究。主要研究內(nèi)容如下:首先,依據(jù)現(xiàn)有理論和參考文獻(xiàn),對(duì)新型屈曲約束支撐整體穩(wěn)定性、內(nèi)芯局部屈曲穩(wěn)定性、外部約束單元局部穩(wěn)定性及局部抗彎承載力、連接段扭轉(zhuǎn)承載力進(jìn)行設(shè)計(jì)和驗(yàn)算。針對(duì)支撐細(xì)部構(gòu)造,從力學(xué)和幾何兩方面進(jìn)行設(shè)計(jì)。其次,運(yùn)用ABAQUS軟件對(duì)新型屈曲約束支撐進(jìn)行有限元建模,對(duì)支撐耗能產(chǎn)生影響的參數(shù):內(nèi)芯初始彎曲缺陷,內(nèi)芯與外部約束單元之間摩擦系數(shù),內(nèi)芯與外部約束單元之間間隙,內(nèi)芯寬厚比,約束比,外部約束單元厚度等進(jìn)行分析,驗(yàn)證現(xiàn)有理論的可靠性與準(zhǔn)確性。然后,依據(jù)新型屈曲約束支撐試件的擬靜力試驗(yàn)結(jié)果,研究了屈曲約束支撐在不同內(nèi)芯板材,不同外部角鋼,不同內(nèi)芯寬厚比下的滯回耗能性能。試驗(yàn)結(jié)果表明,采用工業(yè)純鐵作為內(nèi)芯板材系列的試件較之以Q235B為內(nèi)芯板材的試件,其滯回曲線相對(duì)飽滿但不穩(wěn)定,疲勞性能較好,延性較好。采用兩種不同尺寸的角鋼作為外部約束單元的試件,在相同條件下,試件的相關(guān)的力學(xué)參數(shù)及耗能性能評(píng)價(jià)指標(biāo)基本一致。內(nèi)芯寬厚比取值為8的試件較之內(nèi)芯寬厚比取值為10的試件,其滯回曲線相對(duì)飽滿,內(nèi)芯最大應(yīng)力值較小,內(nèi)芯局部穩(wěn)定性較好。最后,對(duì)新型純鋼屈曲約束支撐基于ABAQUS有限元模擬,有限元模擬結(jié)果與試驗(yàn)結(jié)果在相關(guān)的力學(xué)參數(shù)及耗能評(píng)價(jià)指標(biāo)上基本一致,滯回曲線基本吻合。由于采購的工業(yè)純鐵鋼材,力學(xué)性能不夠穩(wěn)定,以材性試驗(yàn)結(jié)果作為工業(yè)純鐵的本構(gòu)參數(shù),其模擬結(jié)果與試驗(yàn)結(jié)果在支撐屈服力等稍有差別。
[Abstract]:Buckling restrained braces can reach yield under axial compression or tension without buckling. Compared with conventional braces, their good hysteretic energy dissipation performance and stable mechanical properties are more and more popular by engineers, and their construction and installation are convenient. Because of the advantages of economy, flexible design and no influence on the beauty of the main structure, buckling restrained bracing is not only one of the first choices in the seismic design of newly built buildings, but also an important means of seismic reinforcement and reconstruction of completed buildings. In this paper, Q235B and industrial pure iron are used as inner core plates to develop a new kind of economical pure steel buckling restraint braces. The energy dissipation performance of Q235B and industrial pure iron is studied with pseudo-static test and finite element numerical simulation. The main research contents are as follows: firstly, according to the existing theories and references, the global stability, the local buckling stability of the inner core, the local stability of the external restraint element and the local bending bearing capacity of the new buckling restrained braces are studied. The torsional bearing capacity of connection section is designed and checked. Aiming at the structure of the supporting detail, the design is carried out from the two aspects of mechanics and geometry. Secondly, the finite element model of the new buckling restrained braces is established by using ABAQUS software. The parameters that affect the energy consumption of the braces are the initial bending defects of the inner core, the friction coefficient between the inner core and the external constraint element, the gap between the inner core and the external constraint element, and the gap between the inner core and the external constraint element. The width to thickness ratio of inner core, constraint ratio and thickness of external constraint unit are analyzed to verify the reliability and accuracy of existing theories. Then, according to the quasi-static test results of the new buckle-constrained bracing specimens, the hysteretic energy dissipation performance of buckle-constrained braces under different core plates, different external angle steels and different ratio of width to thickness of the inner core is studied. The results show that the hysteretic curve of industrial pure iron is relatively full but unstable, the fatigue property is better and the ductility is better than that of Q235B. Two kinds of angle steel with different sizes are used as external restraint elements. Under the same conditions, the mechanical parameters and energy dissipation performance of the specimens are basically the same. When the ratio of width to thickness of inner core is 8, the hysteresis curve is relatively full, the maximum stress of inner core is smaller, and the local stability of inner core is better than that of the specimen with ratio of width to thickness of inner core. Finally, the buckling restrained braces of new pure steel are simulated by ABAQUS finite element method. The results of finite element simulation are basically consistent with the experimental results in terms of related mechanical parameters and energy dissipation evaluation indexes, and the hysteretic curves are in good agreement with each other. Because the mechanical properties of the industrial pure iron steel purchased are not stable, the material test results are taken as the constitutive parameters of the industrial pure iron, and the simulation results are slightly different from the test results in the support yield force and so on.
【學(xué)位授予單位】：中國地震局工程力學(xué)研究所
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 姜子欽;郭彥林;王小安;張博浩;;雙矩管裝配式防屈曲支撐螺栓設(shè)計(jì)理論研究[J];工程力學(xué);2016年03期

2 姜子欽;郭彥林;張博浩;王小安;;雙矩管裝配式防屈曲支撐設(shè)計(jì)理論研究[J];工程力學(xué);2015年06期

3 郭彥林;姜子欽;王小安;黃彬;;雙矩管裝配式防屈曲支撐約束剛度取值研究[J];工程力學(xué);2015年04期

4 王小安;郭彥林;;一種四角鋼組合約束型防屈曲支撐外圍連接的設(shè)計(jì)方法研究:數(shù)值分析[J];工程力學(xué);2014年02期

5 郭彥林;王小安;;一種四角鋼組合約束型防屈曲支撐外圍連接的設(shè)計(jì)方法研究:理論推導(dǎo)[J];工程力學(xué);2014年01期

6 郭彥林;王小安;;一種四角鋼組合約束型防屈曲支撐的外圍約束比取值研究[J];工程力學(xué);2013年10期

7 王小安;郭彥林;姜子欽;張博浩;;一種四槽鋼組合約束型防屈曲支撐的外圍約束機(jī)理與約束剛度取值研究[J];建筑鋼結(jié)構(gòu)進(jìn)展;2013年03期

8 郭彥林;王小安;;一種四角鋼組合約束型防屈曲支撐的外圍約束機(jī)理及剛度取值研究[J];土木工程學(xué)報(bào);2012年11期

9 馬寧;吳斌;趙俊賢;李惠;歐進(jìn)萍;楊蔚彪;吳勇;;十字形內(nèi)芯全鋼防屈曲支撐構(gòu)件及子系統(tǒng)足尺試驗(yàn)[J];土木工程學(xué)報(bào);2010年04期

10 賈明明;張素梅;;抑制屈曲支撐滯回性能分析[J];天津大學(xué)學(xué)報(bào);2008年06期

相關(guān)博士學(xué)位論文 前2條

1 姜子欽;方矩管裝配式防屈曲支撐設(shè)計(jì)理論與試驗(yàn)研究[D];清華大學(xué);2014年

2 馬寧;全鋼防屈曲支撐及其鋼框架結(jié)構(gòu)抗震性能與設(shè)計(jì)方法[D];哈爾濱工業(yè)大學(xué);2010年

相關(guān)碩士學(xué)位論文 前4條

1 吳勇;全鋼防屈曲支撐抗震性能的有限元分析[D];哈爾濱工業(yè)大學(xué);2008年

2 趙俊賢;無粘結(jié)內(nèi)藏鋼板支撐剪力墻滯回性能試驗(yàn)及工作性能研究[D];哈爾濱工業(yè)大學(xué);2007年

3 陳煜;一字形截面防屈曲支撐的抗震性能研究[D];湖南大學(xué);2006年

4 劉建彬;防屈曲支撐及防屈曲支撐鋼框架設(shè)計(jì)理論研究[D];清華大學(xué);2005年

，

本文編號(hào)：1853587