本文選題：鋼管約束鋼筋混凝土　切入點(diǎn)：鋼管約束型鋼混凝土　出處：《哈爾濱工業(yè)大學(xué)》2014年博士論文　論文類(lèi)型：學(xué)位論文

【摘要】：鋼管約束混凝土柱是在鋼管混凝土柱、箍筋約束混凝土柱和型鋼混凝土柱的基礎(chǔ)上發(fā)展起來(lái)的一種新型組合結(jié)構(gòu)構(gòu)件，具有承載力高、延性好、抗火性能好、施工方便等優(yōu)點(diǎn)。目前國(guó)內(nèi)外對(duì)鋼管約束混凝土柱的研究剛剛起步，以往的研究也主要集中在軸壓短柱方面，而對(duì)工程中最為常見(jiàn)的偏壓構(gòu)件鮮有報(bào)道。本文對(duì)鋼管約束混凝土偏壓構(gòu)件進(jìn)行了試驗(yàn)研究及理論分析，，主要內(nèi)容包括： (1)進(jìn)行了8個(gè)圓鋼管約束鋼筋混凝土軸壓試件和16個(gè)圓鋼管約束鋼筋混凝土偏壓試件試驗(yàn)研究，主要參數(shù)為長(zhǎng)細(xì)比、偏心距及鋼管約束模式。分析了不同鋼管約束模式試件的破壞模式，測(cè)得了試件的荷載-位移曲線、荷載-鋼管應(yīng)力全過(guò)程曲線，建立了圓鋼管約束鋼筋混凝土偏壓構(gòu)件力學(xué)模型。建立了圓鋼管約束鋼筋混凝土偏壓中長(zhǎng)柱有限元模型，對(duì)圓鋼管約束鋼筋混凝土中長(zhǎng)柱進(jìn)行了全過(guò)程有限元分析。 (2)進(jìn)行了8個(gè)方鋼管約束鋼筋混凝土軸壓試件和16個(gè)方鋼管約束鋼筋混凝土偏壓試件試驗(yàn)研究，主要參數(shù)為長(zhǎng)細(xì)比、偏心距及鋼管約束模式。分析了不同鋼管約束模式試件的破壞模式，測(cè)得了試件的荷載-位移曲線、荷載-鋼管應(yīng)力全過(guò)程曲線，建立了方鋼管約束鋼筋混凝土偏壓構(gòu)件力學(xué)模型。建立了方鋼管約束鋼筋混凝土偏壓中長(zhǎng)柱有限元模型，對(duì)方鋼管約束鋼筋混凝土中長(zhǎng)柱進(jìn)行了全過(guò)程有限元分析。 (3)進(jìn)行了12個(gè)圓鋼管約束型鋼混凝土軸壓試件和12個(gè)圓鋼管約束型鋼混凝土偏壓試件試驗(yàn)研究，主要參數(shù)為長(zhǎng)細(xì)比、偏心距、鋼管約束模式及不同的抗剪連接件設(shè)置方式。分析了不同鋼管約束模式試件的破壞模式，測(cè)得了試件的荷載-位移曲線、荷載-鋼管全過(guò)程應(yīng)力曲線，分析了抗剪連接件的影響，建立了圓鋼管約束鋼筋混凝土偏壓構(gòu)件力學(xué)模型。建立了圓鋼管約束鋼筋混凝土偏壓中長(zhǎng)柱有限元模型，對(duì)圓鋼管約束鋼筋混凝土中長(zhǎng)柱進(jìn)行了全過(guò)程有限元分析。 (4)進(jìn)行了12個(gè)方鋼管約束型鋼混凝土軸壓試件和12個(gè)方鋼管約束型鋼混凝土偏壓試件試驗(yàn)研究，主要參數(shù)為長(zhǎng)細(xì)比、偏心距、鋼管約束模式及不同的抗剪連接件設(shè)置方式。分析了不同鋼管約束模式試件的破壞模式，測(cè)得了試件的荷載-位移曲線、荷載-鋼管應(yīng)力全過(guò)程曲線，分析了抗剪連接件的影響，建立了方鋼管約束鋼筋混凝土偏壓構(gòu)件力學(xué)模型。建立了方鋼管約束鋼筋混凝土偏壓中長(zhǎng)柱有限元模型，對(duì)方鋼管約束鋼筋混凝土中長(zhǎng)柱進(jìn)行了全過(guò)程有限元分析。 (5)采用基于Mander模型的約束混凝土本構(gòu)關(guān)系，通過(guò)纖維模型法計(jì)算了試件的荷載-位移曲線；試驗(yàn)結(jié)果表明該模型適用于鋼管約束混凝土構(gòu)件，基于該模型計(jì)算了鋼管約束混凝土的等效矩形應(yīng)力�；谀芰吭恚�(jì)算了鋼管約束混凝土極限壓應(yīng)變；基于鋼管約束混凝土的等效矩形應(yīng)力、鋼管約束混凝土極限壓應(yīng)變，建立了鋼管約束鋼筋混凝土截面偏壓承載力公式。采用切線模量法建議了鋼管約束混凝土構(gòu)件穩(wěn)定系數(shù)，并基于約束混凝土本構(gòu)關(guān)系建立了鋼管約束混凝土構(gòu)件偏心距增大系數(shù)計(jì)算方法。 (6)基于截面全塑性假定，采用纖維模型法計(jì)算了鋼管約束型鋼混凝土偏壓構(gòu)件的N-M相關(guān)曲線，并采用曲線上的4個(gè)特征點(diǎn)，建立了鋼管約束型鋼混凝土截面偏壓承載力簡(jiǎn)化計(jì)算公式；基于截面N-M相關(guān)曲線，通過(guò)折減彎矩的方法，提出了構(gòu)件N-M穩(wěn)定相關(guān)曲線，并提出了鋼管約束型鋼混凝土構(gòu)件偏壓承載力簡(jiǎn)化計(jì)算公式。
[Abstract]:Steel tube confined concrete column in steel tube concrete column, a new type of composite structure component based development of confined concrete columns and steel reinforced concrete columns on the rise, with high bearing capacity, good ductility, good fire resistance, the advantages of convenience. The current research of steel tube confined concrete columns at home and abroad in the past has just started. The study also focused on the columns, and the engineering are the most common members rarely reported. This paper carried out experimental research and theoretical analysis of steel tube confined concrete columns, the main contents include:
(1) the 8 circular tubed reinforced concrete axial compression specimens and 16 circular tube confined reinforced concrete eccentric specimens of test pieces, the main parameters for the slenderness ratio, eccentricity and constraint model. Analysis of different steel tube confined mode failure mode of specimen, measured displacement curve of the test load, load - stress curve of steel tube, a circular tube confined concrete members. A mechanical model of long column finite element model of circular tube confined reinforced concrete eccentric, long columns of circular tubed reinforced concrete finite element analysis of the whole process.
(2) for 8 square tubed reinforced concrete axial compression specimens and 16 square tubed reinforced concrete eccentric specimens of test pieces, the main parameters for the slenderness ratio, eccentricity and constraint model. Analysis of different steel tube confined mode failure mode of specimen, measured displacement curve of the test load, load - stress curve of steel tube, a square tube confined reinforced concrete columns, mechanical model is established. The finite element model of the long column of square steel tube confined reinforced concrete eccentric compression, the other steel tube confined reinforced concrete columns are analyzed by the finite element analysis of the whole process.
(3) the 12 circular tubed steel reinforced concrete axial compression specimens and 12 circular tubed steel reinforced concrete eccentric specimens of test pieces, the main parameters for the slenderness ratio, eccentricity, steel tube confined mode and shear connectors of different set mode. Analysis of different steel tube confined mode failure pattern, measured specimen the load displacement curve, the whole process of load stress curves of tube, analyzed the affect of shear connectors, a circular tube confined concrete members. A mechanical model of long column finite element model of circular tube confined reinforced concrete eccentric, long column of circular steel tube reinforced concrete finite element analysis was carried out in the whole process.
(4) the pilot study on test specimens and 12 STSRC bias 12 STSRC axial pressure, the main parameters for the slenderness ratio, eccentricity, steel tube confined mode and shear connectors of different set mode. Analysis of different steel tube confined mode failure pattern, measured specimen the load displacement curve, load stress curves of steel pipe, analyzes the influence of shear connectors, a square steel tube confined concrete members. A mechanical model of long column finite element model of square tube confined reinforced concrete eccentric compression, the other steel tube confined reinforced concrete in the long column are analyzed by the finite element analysis of the whole process.
(5) the constitutive relationship of confined concrete based on Mander model, the load displacement curve of specimen is calculated by fiber model method; the experimental results show that the model is suitable for steel tube confined concrete component, the equivalent rectangular steel tube confined concrete stress was calculated based on the model. Based on the principle of energy, steel tube confined concrete ultimate compressive strain the calculation of stress; equivalent rectangular steel tube confined concrete based on steel tube confined concrete ultimate compressive strain, a steel tube confined reinforced concrete section bias formula for the bearing capacity of steel tube confined concrete component. The stability coefficient was proposed by tangent modulus method, and based on the established constitutive relationship of confined concrete in steel tube confined concrete component eccentricity coefficient calculation method.
(6) section based on the assumption of full plastic, N-M curve of steel tube confined steel reinforced concrete columns were calculated by fiber model method, and the 4 feature points on the curve, a simplified formula for calculating the bearing capacity of steel tube confined steel reinforced concrete section based on section bias; N-M curve, the method of reducing the bending moment fold, put forward N-M component stability curve, and puts forward the simplified calculation formula of the bearing capacity of steel tube confined steel reinforced concrete member bias.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TU398.9

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