本文關(guān)鍵詞：地震作用下屈曲約束支撐與鋼框架連接節(jié)點(diǎn)的試驗(yàn)研究和理論分析　出處：《合肥工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 屈曲約束支撐 鋼框架 連接方式 抗震性能 有限元分析

【摘要】：屈曲約束支撐是一種新型有效的減震耗能構(gòu)件,其與框架的連接具有輕質(zhì)、抗側(cè)力強(qiáng)、抗震性能好等優(yōu)點(diǎn),已經(jīng)廣泛應(yīng)用于實(shí)際工程中。本文研究了屈曲約束支撐與鋼框架連接節(jié)點(diǎn)在不同連接方式下的抗震性能、破壞模式及工作機(jī)理的影響,進(jìn)行了五榀屈曲約束支撐與鋼框架連接節(jié)點(diǎn)試件的擬靜力試驗(yàn),對(duì)其在地震作用下的工作機(jī)理進(jìn)行了深入分析,開展了有限元分析和參數(shù)分析研究。主要開展了如下研究工作:(1)進(jìn)行了五榀屈曲約束支撐與鋼框架連接節(jié)點(diǎn)試件的水平低周反復(fù)加載試驗(yàn),研究參數(shù)為屈曲約束支撐與節(jié)點(diǎn)板的連接形式。詳細(xì)考察了不同參數(shù)變化下屈曲約束支撐與鋼框架連接節(jié)點(diǎn)的荷載(P)-位移(Δ)關(guān)系滯回曲線等抗震性能及破壞模式。(2)對(duì)各個(gè)試件的試驗(yàn)結(jié)果進(jìn)行深入的討論和理論分析,詳細(xì)研究了屈曲約束支撐與鋼框架連接節(jié)點(diǎn)的強(qiáng)度退化、剛度退化、耗能能力、延性系數(shù)等抗震性能指標(biāo),并從屈曲約束支撐與節(jié)點(diǎn)板轉(zhuǎn)動(dòng)變形和關(guān)鍵部位應(yīng)變變化的過程分析了結(jié)構(gòu)的工作機(jī)理及各構(gòu)件的屈服順序。(3)利用ABAQUS程序分別建立了屈曲約束支撐與鋼框架連接節(jié)點(diǎn)的有限元分析模型,獲得了試件的水平荷載(P)-水平位移(Δ)關(guān)系曲線,并驗(yàn)證了有限元模型的準(zhǔn)確性。分別對(duì)屈曲約束支撐與節(jié)點(diǎn)板兩端焊接連接和混合連接(螺栓-銷)試件進(jìn)行了單調(diào)荷載作用下的非線性受力全過程分析,獲悉其破壞機(jī)理和節(jié)點(diǎn)區(qū)域的應(yīng)力應(yīng)變分布規(guī)律。(4)利用ABAQUS程序建立了單層單跨屈曲約束支撐鋼框架的簡化計(jì)算模型,并驗(yàn)證了其準(zhǔn)確性�？疾炝斯�(jié)點(diǎn)板的鋼材屈服強(qiáng)度、軸壓比、節(jié)點(diǎn)板厚度、節(jié)點(diǎn)板上加勁肋端部到節(jié)點(diǎn)板邊緣的垂直距離(L)與節(jié)點(diǎn)板Whitmore有效寬度(bE)的比值、屈曲約束支撐與節(jié)點(diǎn)板連接形式、節(jié)點(diǎn)板有無加勁板和框架高寬比等參數(shù)對(duì)結(jié)構(gòu)受力性能和應(yīng)力分布的影響。
[Abstract]:Buckling restrained bracing is a new type of effective seismic energy dissipation member, its connection with the frame has the advantages of light weight, strong lateral force resistance, good seismic performance and so on. It has been widely used in practical engineering. In this paper, the seismic behavior, failure mode and working mechanism of buckling restrained braces and steel frame connections under different connection modes are studied. Quasi static tests of five specimens of buckling restrained braces and steel frame connection joints were carried out, and the working mechanism of the specimens under seismic action was analyzed in depth. The finite element analysis and parameter analysis are carried out. The main work is as follows: 1) five specimens of buckling restrained braces and steel frame joints are subjected to horizontal low-cycle repeated loading tests. The parameters are the joint form of buckling restrained bracing and joint plate. The load and displacement (螖) of buckling restrained bracing and steel frame connection joint under different parameters are investigated in detail. Relation hysteretic curve and other seismic behavior and failure mode. 2) the experimental results of each specimen are discussed and analyzed theoretically. The strength degradation, stiffness degradation, energy dissipation capacity, ductility coefficient and other seismic performance indexes of buckling restrained braces and steel frame connections are studied in detail. The working mechanism of the structure and the yield order of each member are analyzed from the process of buckling restrained bracing, rotational deformation of the joint plate and strain change at the key position. The finite element analysis model of the joint between buckling restrained braces and steel frame is established by ABAQUS program. The horizontal load and horizontal displacement (螖) curves of the specimens are obtained. The accuracy of the finite element model is verified. The nonlinear load analysis of buckling restrained braces and welded joints (bolt-pin) specimens under monotonic load is carried out. The failure mechanism and the stress-strain distribution in the joint region are known. (4) A simplified calculation model of single-story single-span buckling braced steel frame is established by using ABAQUS program. The steel yield strength, axial compression ratio and thickness of the joint plate were investigated. The ratio of the vertical distance from the stiffened rib end to the edge of the joint plate to the Whitmore effective width of the joint plate, the buckling constraint support and the connection form of the joint plate. The influence of stiffened plate and the ratio of height to width of the frame on the mechanical performance and stress distribution of the structure with or without stiffening plate.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.11

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