本文選題：型鋼混凝土 + L形柱��； 參考：《土木工程學報》2016年09期

【摘要】：為研究型鋼混凝土L形柱-混凝土梁框架節(jié)點的滯回性能,以柱截面配鋼形式、軸壓比、水平加載角度及有無樓板參與工作為變化參數(shù),進行4個平面和7個空間L形柱-混凝土梁框架節(jié)點的擬靜力試驗;比較分析試件的破壞形態(tài)、滯回曲線、承載能力、剛度退化、耗能能力、位移延性以及層間位移角等抗震性能指標。研究結(jié)果表明:平面節(jié)點和空間節(jié)點的破壞形態(tài)分別為核心區(qū)發(fā)生剪切破壞和梁端出現(xiàn)塑性鉸,帶樓板工作的鋼筋混凝土梁柱空間節(jié)點出現(xiàn)板的彎曲破壞以及梁底出現(xiàn)塑性鉸的破壞模式;配實腹式型鋼試件的滯回曲線比配空腹式型鋼試件的飽滿;平面節(jié)點的承載能力比空間節(jié)點的大,但耗能能力、位移延性及抗倒塌能力均不及空間節(jié)點;樓板的存在對節(jié)點承載能力的提高和維持剛度的穩(wěn)定均具有有利作用;軸壓比可提高節(jié)點的承載力和初始剛度;L形柱框架節(jié)點的層間變形能力大于規(guī)范規(guī)定的層間位移角限值。通過引入加載角度,提出了型鋼混凝土L形柱-梁空間節(jié)點受剪承載力計算模型,其能較好地反映節(jié)點核心發(fā)生剪切破壞的傳力機制。
[Abstract]:In order to study the hysteretic behavior of steel reinforced concrete L-shaped column-concrete beam frame joints, the parameters of column section, axial compression ratio, horizontal loading angle and the participation of floor slab are taken as parameters.The pseudostatic test of 4 plane and 7 space L-shaped column-concrete beam frame joints was carried out, and the failure patterns, hysteretic curves, bearing capacity, stiffness degradation, energy dissipation capacity of the specimens were compared and analyzed.Seismic performance indexes such as displacement ductility and interstory displacement angle.The results show that the failure patterns of plane joints and spatial joints are shear failure in the core region and plastic hinge at the beam end, respectively.The bending failure of reinforced concrete Liang Zhu space joint and the failure mode of plastic hinge on the bottom of beam, the hysteretic curve of the steel specimen with solid web is fuller than that of the steel specimen with empty stomach, and the bending failure mode of the space joint of reinforced concrete with working floor slab and the failure mode of plastic hinge on the bottom of the beam are also discussed.The bearing capacity of plane joints is larger than that of spatial joints, but the energy dissipation capacity, displacement ductility and collapse resistance are not as good as those of space joints, and the existence of floor slab is beneficial to the improvement of the bearing capacity and the stability of stiffness of the joints.The axial compression ratio can improve the bearing capacity and initial stiffness of the joints and the interstory deformation capacity of the L-shaped column frame joints is greater than the inter-story displacement angle limit specified in the code.By introducing the loading angle, a model for calculating the shear capacity of spatial joints of L-shaped columns and beams of steel reinforced concrete (SRC) is proposed, which can better reflect the mechanism of shear failure in the core of the joints.
【作者單位】： 廣西大學土木建筑工程學院;工程防災與結(jié)構(gòu)安全教育部重點實驗室;
【基金】：國家自然科學基金(50908057,51268004) 廣西防災減災與工程安全重點實驗室開放課題(2012ZDX10) 廣西研究生教育創(chuàng)新計劃項目(YCBZ2012005)
【分類號】：TU398.9

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