【摘要】：連柱鋼框架結(jié)構(gòu)是一種典型的損傷控制結(jié)構(gòu),通過(guò)耗能連梁連接鋼框架毗鄰雙柱構(gòu)成。在地震作用下連柱系統(tǒng)的耗能連梁率先進(jìn)入塑性耗散能量,僅當(dāng)變形過(guò)大時(shí)框架梁、柱等非耗能構(gòu)件才會(huì)發(fā)展塑性,結(jié)構(gòu)具有顯著的屈服時(shí)序。本文應(yīng)用ABAQUS有限元分析軟件對(duì)連柱鋼框架結(jié)構(gòu)進(jìn)行抗震性能分析,對(duì)框架跨度、高度、鋼材強(qiáng)度等級(jí)及耗能連梁長(zhǎng)度如何影響結(jié)構(gòu)的抗震性能提出建議,并給出了耗能連梁可替換層間位移角的合理范圍。本文主要完成了以下工作:(1)參考相關(guān)規(guī)范和文獻(xiàn),應(yīng)用SAP2000軟件設(shè)計(jì)了1棟4×6跨共6層的連柱鋼框架結(jié)構(gòu),并從中取出一榀下部2層結(jié)構(gòu)作為有限元分析的BASE試件。(2)應(yīng)用有限元分析軟件ABAQUS建立BASE試件模型,并通過(guò)對(duì)已有相關(guān)試驗(yàn)的模擬分析,驗(yàn)證本文建模方法的合理性。(3)從滯回曲線、骨架曲線、剛度退化曲線和累積滯回耗能等方面對(duì)BASE試件的抗震性能進(jìn)行分析,并與耗能連梁采用傳統(tǒng)焊接連接的LJ試件進(jìn)行比較,結(jié)果表明:只要耗能連梁的連接具有一定的強(qiáng)度和剛度,BASE試件與LJ試件具有相同的抗震性能。(4)采用有限元分析軟件ABAQUS考察框架層高、框架跨度、框架鋼材強(qiáng)度等級(jí)以及耗能連梁長(zhǎng)度對(duì)連柱鋼框架整體結(jié)構(gòu)抗震性能的影響,結(jié)果表明:跨度對(duì)結(jié)構(gòu)整體滯回性能影響較小,層高對(duì)結(jié)構(gòu)整體耗能性能影響較大;剪切屈服型耗能連梁更適用于連柱鋼框架結(jié)構(gòu);隨著框架鋼材強(qiáng)度等級(jí)的提高,結(jié)構(gòu)的耗能機(jī)制更加合理。(5)利用簡(jiǎn)化的三折線模型并結(jié)合連柱鋼框架結(jié)構(gòu)損傷的特點(diǎn),考慮鋼框架的層高、鋼框架的跨度、框架鋼材強(qiáng)度等級(jí)以及耗能連梁的長(zhǎng)度的影響,給出了連柱鋼框架結(jié)構(gòu)耗能連梁可替換層間位移角的合理范圍。
[Abstract]:The continuous-column steel frame structure is a typical damage control structure, which is formed by connecting a steel frame with a steel frame by an energy-consuming connecting beam. In the earthquake action, the energy-consuming connecting beam of the continuous column system is the first to enter the plastic dissipation energy, and the non-energy-consuming components such as the frame beam and the column can develop plasticity only when the deformation is too large, and the structure has a remarkable yield time sequence. This paper applies ABAQUS finite element analysis software to analyze the seismic performance of the continuous-column steel frame structure, and puts forward some suggestions on how the frame span, height, strength grade of steel and the length of the energy-consuming connecting beam affect the seismic performance of the structure, and gives the reasonable range of the alternative interlayer displacement angle of the energy-consuming connecting beam. In this paper, the following work is done: (1) With reference to the relevant specifications and the literature, the structure of a 4-6-span 6-layer continuous-column steel frame structure is designed by using SAP2000, and a structure of the lower layer 2 is taken out as the base-piece of the finite element analysis. (2) Using the finite element analysis software, ABAQUS to establish the base test piece model, and through the simulation analysis of the existing correlation test, the rationality of the modeling method is verified. (3) The anti-seismic performance of the BASE test piece is analyzed from the aspects of the hysteresis curve, the skeleton curve, the stiffness degradation curve and the accumulated hysteretic energy consumption, and compared with the LJ test piece with the traditional welding connection with the energy-consuming connecting beam, and the results show that: As long as the connection of the energy-consuming connecting beam has certain strength and rigidity, the BASE test piece has the same anti-seismic performance as the LJ test piece. (4) Using the finite element analysis software, ABAQUS, the effect of the frame height, the frame span, the strength grade of the frame steel and the length of the energy-consuming connecting beam on the seismic performance of the whole structure of the continuous-column steel frame is investigated. The results show that the effect of the span on the overall hysteretic behavior of the structure is small. The influence of the height on the overall energy dissipation performance of the structure is great; the shear yield-type energy-consuming connecting beam is more suitable for the frame structure of the continuous-column steel; with the improvement of the strength grade of the steel frame steel, the energy-consuming mechanism of the structure is more reasonable. (5) using the simplified three-fold line model and combining the characteristics of the damage of the continuous-column steel frame structure, taking into consideration the influence of the height of the steel frame, the span of the steel frame, the strength grade of the frame steel and the length of the energy-consuming connecting beam, The reasonable range of the inter-layer displacement angle of the continuous-column steel frame structure energy-consuming connecting beam is given.
【學(xué)位授予單位】：蘇州科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TU352.11;TU391

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