發(fā)布時(shí)間：2018-05-11 09:53

  本文選題：高性能鋼筋混凝土 + 梁柱節(jié)點(diǎn)��； 參考：《華中科技大學(xué)》2013年碩士論文

【摘要】：本文對(duì)鋼筋混凝土框架中間層節(jié)點(diǎn)的研究現(xiàn)狀進(jìn)行了綜述，歸納出框架中間層節(jié)點(diǎn)的破壞方式，研究了定量分析節(jié)點(diǎn)破壞模式的理論可行性，發(fā)現(xiàn)約束機(jī)構(gòu)和組合塊體機(jī)構(gòu)是斜壓桿—桁架機(jī)構(gòu)在加載過(guò)程中的理論延續(xù)。進(jìn)入到加載后期，隨著斜壓桿—桁架機(jī)構(gòu)作用的退化，約束機(jī)構(gòu)和組合塊體機(jī)構(gòu)的存在使得節(jié)點(diǎn)可以繼續(xù)承擔(dān)外部荷載。 用ANSYS對(duì)配置HRB500E高性能鋼筋混凝土框架中間層邊節(jié)點(diǎn)進(jìn)行有限元建模，預(yù)測(cè)了邊節(jié)點(diǎn)試件的破壞模式：JD2和JD3發(fā)生梁端彎曲破壞，JD1同時(shí)發(fā)生梁端彎曲破壞和剪切破壞。為了研究軸壓比、節(jié)點(diǎn)核心區(qū)配箍率和剪壓比對(duì)配置高性能鋼筋混凝土框架中間層邊節(jié)點(diǎn)抗剪承載力的影響，本文對(duì)已有構(gòu)件進(jìn)行了擴(kuò)展。對(duì)比已有構(gòu)件和擴(kuò)展構(gòu)件的ANSYS運(yùn)算結(jié)果，得出在中低剪壓比條件下，增大軸壓比可以提高節(jié)點(diǎn)的剛度和抗剪承載力，節(jié)點(diǎn)核心區(qū)的配箍率能顯著提高節(jié)點(diǎn)的抗剪承載力。剪壓比雖然對(duì)節(jié)點(diǎn)核心區(qū)的抗剪承載力沒(méi)有影響，但它和節(jié)點(diǎn)核心區(qū)配箍率是影響框架中間層節(jié)點(diǎn)破壞模式的主要因素。在中低剪壓比下，節(jié)點(diǎn)會(huì)發(fā)生梁端的彎曲破壞；在中高剪壓比下，隨著節(jié)點(diǎn)核心區(qū)配箍率的增大，，節(jié)點(diǎn)核心區(qū)依次發(fā)生斜拉破壞、剪壓破壞和斜壓破壞。
[Abstract]:In this paper, the research status of RC frame interlayer joints is summarized, and the failure modes of RC frame interlayer joints are summarized, and the theoretical feasibility of quantitative analysis of joint failure modes is studied. It is found that the constraint mechanism and the combined block mechanism are the theoretical continuation of the oblique bar-truss mechanism during the loading process. At the later stage of loading, with the degradation of the action of oblique compression bar and truss mechanism, the existence of constraint mechanism and combined block mechanism makes the joint continue to bear external loads. In this paper, the finite element model of the edge joints in the middle layer of reinforced concrete frame with HRB500E is modeled by ANSYS, and the failure modes of the specimens with edge joints are predicted, that is, the beam end bending failure and the shear failure occur simultaneously with the beam end bending failure in JD3 and the beam end bending failure. In order to study the influence of axial compression ratio hoop ratio and shear compression ratio on the shear bearing capacity of the joints with high performance RC frame the existing members are expanded in this paper. Compared with the ANSYS calculation results of existing members and extended members, it is concluded that increasing axial compression ratio can improve the stiffness and shear bearing capacity of joints under the condition of low shear compression ratio, and the hoop ratio in the core area of joints can significantly improve the shear capacity of joints. Although the shear compression ratio has no effect on the shear bearing capacity of the joints in the core zone, it and the hoop ratio in the core zone of the joints are the main factors affecting the failure mode of the joints in the middle layer of the frame. Under the low shear compression ratio, the beam end bending failure will occur, and at the medium to high shear compression ratio, the diagonal failure, shear compression failure and baroclinic failure will occur with the increase of hoop ratio in the core area of the joint.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TU375

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