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裝配式抗側(cè)力鋼柱抗震性能研究

發(fā)布時間:2018-10-21 20:57
【摘要】:我國近年出臺了多項政策鼓勵發(fā)展裝配式建筑和鋼結(jié)構(gòu)。本文提出了裝配式抗側(cè)力鋼柱,該鋼柱可以作為抗側(cè)力構(gòu)件適用于民用建筑結(jié)構(gòu)。在建筑結(jié)構(gòu)中不僅具有較好的抗震性能,滿足建筑結(jié)構(gòu)設(shè)計的要求,在裝配式方面,也可以達(dá)到標(biāo)準(zhǔn)化設(shè)計、工廠化生產(chǎn)、裝配化施工方面等的要求。首先,設(shè)計了三組不同類型的裝配式抗側(cè)力鋼柱,并分別對三組進行了數(shù)值模擬分析和擬靜力加載試驗,主要通過破壞模式、滯回性能等各項性能對三組的抗震性能進行研究,其中有耗能彎和無耗能彎的裝配式抗側(cè)力鋼柱為研究的重點。其次,設(shè)計了裝配式抗側(cè)力密網(wǎng)鋼柱,通過數(shù)值模擬分析的方法對裝配式抗側(cè)力密網(wǎng)鋼柱的結(jié)構(gòu)形式及尺寸進行了優(yōu)選。通過分析得到以下結(jié)論:(1)從數(shù)值模擬分析后的應(yīng)力云圖和試驗現(xiàn)象可知,有耗能彎的裝配式抗側(cè)力鋼柱中綴件的耗能彎部分承擔(dān)了構(gòu)件加載后期的主要的抗震耗能,與沒有耗能彎的比較,表現(xiàn)出比較優(yōu)越的變形能力;(2)在柱頂水平向位移加載到層間位移角為1/250時,裝配式抗側(cè)力鋼柱仍處于彈性階段,滿足規(guī)范要求,且承載力呈現(xiàn)出增長的趨勢;(3)在柱頂水平向位移加載到層間位移角1/50時,綴件有耗能彎的裝配式抗側(cè)力鋼柱的承載力仍沒有表現(xiàn)出下降的趨勢,且耗能能力較綴件無耗能彎的裝配式抗側(cè)力鋼柱更穩(wěn)定,耗能彎部分承擔(dān)了構(gòu)件加載后期的主要的抗震耗能;(4)通過擬靜力加載試驗與數(shù)值模擬得到的結(jié)果吻合較好。所以,通過有限元軟件ABAQUS進行數(shù)值模擬分析的方法可以作為研究裝配式抗側(cè)力鋼柱的有效手段;(5)通過對各分組裝配式抗側(cè)力密網(wǎng)鋼柱模型進行數(shù)值模擬分析后,比較各組的滯回性能得到了最優(yōu)的結(jié)構(gòu)形式和細(xì)部尺寸。
[Abstract]:In recent years, China has introduced a number of policies to encourage the development of prefabricated buildings and steel structures. In this paper, a prefabricated steel column for lateral force resistance is proposed, which can be used as a lateral force resistant member for civil construction. In building structure, it not only has good seismic performance and meets the requirements of structural design, but also can meet the requirements of standardized design, factory production, assembly construction and so on. First of all, three groups of different types of fabricated steel columns are designed, and the numerical simulation and quasi-static loading tests are carried out respectively for the three groups. The aseismic performance of the three groups is studied mainly by the failure mode, hysteretic performance and other properties. The emphasis of the study is on the fabricated steel columns with and without energy dissipation bending. Secondly, the fabricated steel column with anti-lateral force is designed, and the structural form and size of the fabricated steel column are optimized by numerical simulation. The following conclusions are obtained from the analysis: (1) from the stress cloud diagram and experimental phenomena after numerical simulation analysis, it can be seen that the energy dissipation bending part of the affixes of the assembled lateral force steel columns with energy dissipation bending bears the main seismic energy consumption in the later stage of the member loading. Compared with those without energy dissipation bending, it shows superior deformation ability. (2) when the displacement angle of column top is 1 / 250, the fabricated lateral force resistant steel column is still in the elastic stage, which meets the requirements of the specification. And the bearing capacity shows an increasing trend. (3) when the horizontal displacement of the column is loaded to the interstory displacement angle of 1 / 50, the bearing capacity of the fabricated steel columns with energy-consuming bending still has no downward trend. The energy dissipation capacity is more stable than the fabricated steel column with no energy dissipation bending, and the energy dissipation bending part bears the main seismic energy consumption in the later loading stage of the member. (4) the results obtained from the quasi-static loading test are in good agreement with the numerical simulation. Therefore, the method of numerical simulation analysis by finite element software ABAQUS can be used as an effective means to study the fabricated steel columns with lateral force resistance. (5) after the numerical simulation and analysis of the steel column models of each group assembly type, The optimum structure and detail size are obtained by comparing the hysteretic performance of each group.
【學(xué)位授予單位】:北京建筑大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU391;TU352.11

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