發(fā)布時間：2018-04-26 06:38

  本文選題：空間夾心節(jié)點 + 低周往復(fù)荷載�。� 參考：《工程抗震與加固改造》2016年06期

【摘要】：通過單向和雙向兩種加載方式下空間夾心節(jié)點(即核心區(qū)采用同梁等強(qiáng)的低強(qiáng)度混凝土澆筑的節(jié)點)的低周往復(fù)荷載試驗,研究了不同加載方式對夾心節(jié)點的破壞形式、破壞程度、延性、耗能、剛度退化的影響。結(jié)果表明:單向和雙向加載方式下,夾心節(jié)點的破壞形式以梁縱筋屈服后節(jié)點核心區(qū)的破壞為主,但雙向加載方式下節(jié)點的破壞程度更為嚴(yán)重,且延性有所降低;雙向荷載的耦合作用降低了節(jié)點的抗剪承載力,在設(shè)計中僅考慮單方向地震作用是不安全的;兩種加載方式對節(jié)點耗能性能和剛度退化的影響不明顯。
[Abstract]:In this paper, the failure modes of sandwich joints under different loading modes are studied by low-cycle reciprocating load tests of space sandwich joints under unidirectional and bidirectional loading modes (that is, joints with the same beam and other strong low-strength concrete castings) in the core area, and the failure modes of the joints under different loading modes are studied. Damage degree, ductility, energy dissipation and stiffness degradation. The results show that under unidirectional and bidirectional loading mode, the failure mode of sandwich joints is mainly the failure of the core area after the yield of longitudinal tendons, but the failure degree of the joints is more serious and the ductility of the joints decreases under the two-way loading mode. The coupling effect of bidirectional load reduces the shear bearing capacity of joints, and it is not safe to consider only unidirectional seismic action in the design, and the effect of two loading modes on the energy dissipation performance and stiffness degradation of joints is not obvious.
【作者單位】： 中鐵建設(shè)集團(tuán)有限公司;北京工業(yè)大學(xué)工程抗震與結(jié)構(gòu)診治北京市重點實驗室;
【基金】：國家自然科學(xué)基金資助項目(51421005)
【分類號】：TU352.11
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本文編號：1804940