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(合肥工業(yè)大學(xué)土木與水利工程學(xué)院， 合肥 230009)
［摘要］對節(jié)點區(qū)附近的鋼管柱壁進行加厚，設(shè)計了一種無橫向加勁肋的節(jié)點域柱壁加強型方鋼管柱-H型鋼梁節(jié)點。通過5個節(jié)點試件的低周反復(fù)加載試驗，研究了軸壓比、節(jié)點區(qū)柱寬厚比和有無豎向加勁肋對節(jié)點試件抗震性能的影響。結(jié)果表明：各試件的滯回曲線形狀較為飽滿，剛度退化較為平緩，位移延性系數(shù)在3.0~4.1之間，等效黏滯阻尼系數(shù)在0.27~0.31之間，節(jié)點具有較好的塑性變形能力和抗震性能。隨著軸壓比的增大，節(jié)點的承載能力、延性和耗能能力均有所減?。浑S著節(jié)點區(qū)柱寬厚比的減小，節(jié)點的承載能力、延性和耗能能力均有所提高；節(jié)點區(qū)柱內(nèi)設(shè)置豎向加勁肋，節(jié)點的承載能力顯著提高，但延性和耗能能力相對較低。
［關(guān)鍵詞］節(jié)點域柱壁加強；梁柱節(jié)點；低周反復(fù)加載；抗震性能
中圖分類號：TU391 文獻標(biāo)識碼：A文章編號：1002-0848X(2021)18-0009-08
Experimental study on seismic performance of H-shaped steel beam joint to square tubular column connection by joint field column wall reinforcement
CHEN Lihua, CHEN Kun, XIA Dengrong, CHEN Qi
(College of Civil Engineering，Hefei University of Technology, Hefei 230009， China)
Abstract: By thickening the square tubular column near the joint field, a type of H-shaped steel beam joint to square tubular column connection by joint field column wall reinforcement without transverse stiffener was designed. Through the low-cycle repeated loading test of 5 joint specimens, the effect of axial compression ratio, width-thickness ratio of the joint area column and the existence of vertical stiffeners on seismic performance were studied. The results show that the hysteretic curves of specimens are relatively plump, the stiffness degradation are relatively gentle, the displacement ductility coefficient is between 3.0 and 4.1, and the equivalent viscous damping coefficient is between 0.27 and 0.31, which has good plastic deformation ability and seismic performance. The bearing capacity, ductility and energy dissipation capacity of the joints decrease by increasing of the axial compression ratio. With the decrease of the width-thickness ratio of the joint area column, the bearing capacity, ductility and energy dissipation capacity of the joints improve. The bearing capacity of the joint is significantly improved by installing vertical stiffeners in the column of the joint area, but the ductility and energy dissipation capacity are relatively low.
Keywords:joint field column wall reinforcement； beam-column joint； low-cycle repeated loading； seismic performance
*國家自然科學(xué)基金（51778202）。
作者簡介：陳麗華，博士，教授，Email:hfclh1972@hfut.edu.com。
