本文選題：RCS組合框架　切入點(diǎn)：現(xiàn)澆樓板　出處：《西安建筑科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：鋼筋混凝土柱-型鋼梁(RCS)組合框架結(jié)構(gòu)是由鋼筋混凝土柱和型鋼梁組合而成,這種結(jié)構(gòu)體系充分利用了混凝土柱和鋼梁各自構(gòu)件的優(yōu)點(diǎn)。目前,對(duì)該體系的研究主要集中在梁柱節(jié)點(diǎn)方面,而對(duì)RCS組合框架結(jié)構(gòu)整體抗震性能的研究很少。本文主要研究現(xiàn)澆樓板對(duì)RCS組合框架屈服機(jī)制的影響規(guī)律,并對(duì)比分析RCS組合框架和其它類型框架的抗震性能。針對(duì)RCS組合框架結(jié)構(gòu),分別建立有樓板和無(wú)樓板結(jié)構(gòu)的有限元模型,通過(guò)非線性靜力分析,對(duì)兩種結(jié)構(gòu)在不同地震水準(zhǔn)下的抗震性能進(jìn)行評(píng)估。重點(diǎn)研究現(xiàn)澆組合樓板對(duì)RCS組合框架結(jié)構(gòu)破壞過(guò)程和屈服機(jī)制的影響。算例計(jì)算結(jié)果表明,現(xiàn)澆樓板可增大型鋼梁的剛度和抗彎承載力,使RCS框架結(jié)構(gòu)的破壞形態(tài)呈現(xiàn)“柱鉸機(jī)制”,且延性降低很多。通過(guò)有限元的進(jìn)一步建模,分別研究現(xiàn)澆樓板的跨度和厚度對(duì)RCS組合框架梁剛度的影響規(guī)律。結(jié)果表明,RCS組合框架中梁剛度放大系數(shù)在鋼梁與板厚的比值較大或較小時(shí),均會(huì)超出規(guī)范的規(guī)定范圍。此外,通過(guò)線性回歸分析,建立了型鋼梁中梁剛度放大系數(shù)與型鋼梁高度和混凝土樓板厚度的關(guān)系式。對(duì)具有不同開(kāi)洞樓板的RCS組合框架結(jié)構(gòu)進(jìn)行有限元建模和分析,探討現(xiàn)澆樓板對(duì)RCS組合框架梁受彎承載力的影響,并基于拉應(yīng)力等效原則,對(duì)考慮樓板貢獻(xiàn)的框架梁有效翼緣寬度的合理取值進(jìn)行了研究。結(jié)果表明,型鋼梁兩側(cè)6倍板厚范圍內(nèi)的現(xiàn)澆樓板可作為有效翼緣寬度的計(jì)算范圍。此外,還考慮翼緣板范圍內(nèi)鋼筋對(duì)梁端抗彎承載力的貢獻(xiàn),提出了梁端實(shí)際抗彎承載力的計(jì)算公式。分別采用四種結(jié)構(gòu)體系(鋼框架、鋼筋混凝土框架、RCS組合框架、鋼管混凝土組合框架)對(duì)同一建筑進(jìn)行結(jié)構(gòu)設(shè)計(jì),使其均滿足三階段兩水準(zhǔn)的抗震要求。并對(duì)比分析四種框架結(jié)構(gòu)的抗震性能。結(jié)果表明,在實(shí)現(xiàn)同樣使用功能的前提下,RCS組合框架結(jié)構(gòu)的抗震性能介于鋼筋混凝土框架和鋼框架之間。
[Abstract]:The reinforced concrete column-steel beam composite frame structure is composed of reinforced concrete column and steel beam. This kind of structure system makes full use of the advantages of concrete column and steel beam. The research on this system is mainly focused on Liang Zhu joints, but little on the overall seismic behavior of RCS composite frame structure. In this paper, the effect of cast-in-place floor on yield mechanism of RCS composite frame is studied. The seismic behavior of RCS composite frames and other types of frames are compared and analyzed. For RCS composite frame structures, the finite element models with and without floor structures are established, and the nonlinear static analysis is carried out. The seismic behavior of two kinds of structures under different earthquake levels is evaluated. The effect of cast-in-place composite floor on the failure process and yield mechanism of RCS composite frame structure is mainly studied. Cast-in-place floor slab can increase the stiffness and flexural capacity of large steel beams, and make the failure form of RCS frame structure appear "column hinge mechanism", and its ductility is much lower. The effects of the span and thickness of cast-in-place slab on the stiffness of RCS composite frame beam are studied respectively. The results show that the stiffness magnification factor of beam in RCS composite frame is larger or smaller than that of steel beam and slab thickness. By linear regression analysis, the relationship between the stiffness magnification factor of steel beam and the height of steel beam and the thickness of concrete slab is established. The finite element model and analysis of RCS composite frame structure with different openings are carried out. The effect of cast-in-place floor slab on flexural bearing capacity of RCS composite frame beam is discussed. Based on the principle of equivalent tensile stress, the reasonable selection of effective flange width of frame beam considering floor contribution is studied. The cast-in-place slab can be used as the calculation range of the effective flange width in the range of 6 times the thickness of the slab on both sides of the steel beam. In addition, the contribution of the reinforcement to the flexural bearing capacity of the beam end is considered in the range of the flange slab. The formulas for calculating the actual flexural bearing capacity of the beam end are put forward. Four structural systems (steel frame, reinforced concrete frame / RCS composite frame, steel tube concrete composite frame) are used to design the same building respectively. The seismic performance of four frame structures is compared and analyzed. The results show that, The seismic behavior of RCS composite frame structure is between reinforced concrete frame and steel frame.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU398.9;TU352.11

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