- 摘 要
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（新疆農(nóng)業(yè)大學(xué)水利與土木工程學(xué)院， 烏魯木齊 830052）
［摘要］為研究帶縱向加強肋復(fù)合墻體在豎向荷載作用下的力學(xué)性能，設(shè)計并制作一榀1/2縮尺比例模型墻體進(jìn)行豎向均布荷載作用下的試驗研究，探析復(fù)合墻體的破壞過程及墻體內(nèi)鋼筋應(yīng)變在加載過程中的變化規(guī)律。采用ABAQUS軟件建立不同工況下墻體的數(shù)值模型進(jìn)行數(shù)值計算，分析影響墻體豎向承載力的主要因素。結(jié)果表明：復(fù)合墻體在豎向均布荷載作用下經(jīng)歷了彈性階段、彈塑性階段和破壞階段；墻體破壞由上層角部砌塊壓碎剝落開始，最終由于框柱柱腳混凝土壓碎、鋼筋外鼓而失效；試驗墻體的屈服荷載為250kN，破壞時極限荷載為300kN；墻體受力過程中，底部肋梁受壓，上部肋梁受拉，中部肋梁鋼筋應(yīng)變在0～50με之間；框柱混凝土強度對墻體豎向承載力影響最大，肋梁配筋率對墻體豎向承載力影響程度最小。
［關(guān)鍵詞］復(fù)合墻體；縱向加強肋；肋梁；鋼筋應(yīng)變；承載力
中圖分類號：TU317+.2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)06-0099-06
Study on mechanical performance of composite wall with longitudinal reinforcing rib under vertical loads
CHEN Guoxin, WANG Li, HU Yulong, XI Liang
(College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China)
Abstract:For the purpose of exploring the mechanical properties of composite wall with longitudinal reinforcing rib under the vertical loads, a 1/2 reduced scale model wall was designed and made to conduct an experimental study under the action of vertical uniform loads in order to analyze the failure process of the composite wall and the change law of the strain of the steel bar in the wall during the loading process. ABAQUS software was used to establish numerical models of the wall under different working conditions for numerical calculation, and the main factors affecting the vertical bearing capacity of the wall were analyzed. The results show that the composite wall has undergone an elastic stage, an elastoplastic stage and a failure stage under the action of the vertical uniform load; the wall failure starts from the crushing and peeling of the upper corner blocks, and finally the wall fails due to the concrete crushing of the outer frame column foot and the externally bulged steel bar; the yield load of the test wall is 250kN, and the ultimate load at failure is 300kN; during the experimental process of the wall, the bottom rib beam is compressed, the upper rib beam is tensioned, and the steel bar strain of the middle rib beam is between 0～50με; the concrete strength of the outer frame column has the greatest influence on the vertical bearing capacity of the wall, and the rib beam reinforcement ratio has the smallest influence on the vertical bearing capacity of the wall.
Keywords:composite wall;longitudinal reinforcing rib;rib beam;steel bar strain;bearing capacity
*新疆維吾爾自治區(qū)自然科學(xué)基金（2016D01A045）。
作者簡介：陳國新，博士，教授，博士生導(dǎo)師，Email: xjbnchgx@163.com。
