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（1 海南大學(xué)土木建筑工程學(xué)院， 海口 570228； 2 海南國際旅游島發(fā)展研究院， ?？?570228； 3 浙江省建筑設(shè)計(jì)研究院， 杭州 310006； 4 海南工商職業(yè)學(xué)院建筑工程系， ?？?570203）
［摘要］ABAUQS軟件內(nèi)嵌的損傷塑性模型已較多地被應(yīng)用于混凝土結(jié)構(gòu)有限元分析，但采用其對箍筋約束混凝土進(jìn)行模擬的研究很少。研究了混凝土單軸受壓應(yīng)力-應(yīng)變關(guān)系對損傷塑性模型模擬箍筋約束混凝土力學(xué)性能的影響。通過在損傷塑性模型中引入三種不同的混凝土單軸受壓應(yīng)力-應(yīng)變關(guān)系曲線定義其受壓行為，建立箍筋約束混凝土柱的三維非線性有限元模型。有限元分析結(jié)果與試驗(yàn)結(jié)果對比分析表明，在損傷塑性模型中采用合適的單軸受壓應(yīng)力-應(yīng)變關(guān)系對模擬結(jié)果的準(zhǔn)確度非常重要，并且應(yīng)用本文建議的單軸受壓應(yīng)力-應(yīng)變關(guān)系曲線對約束混凝土進(jìn)行模擬具有較好效果。
［關(guān)鍵詞］箍筋約束混凝土； 箍筋約束效應(yīng)； 損傷塑性模型； 單軸受壓應(yīng)力-應(yīng)變關(guān)系； 有限元建模
中圖分類號：TU375文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)06-0060-05
Investigation on finite element modeling of stirrup-confined concrete based on damaged plasticity model
Zeng Xiang1, 2， Ren Xiaohu3， Zou Juan4
(1 College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China; 2 Hainan Institute of Development on International Tourist Destination, Haikou 570228, China; 3 Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China; 4 Department of Architecture and Civil Engineering, Hainan Technology and Business College, Haikou 570203, China)
Abstract:Damaged plasticity (DP) model embedded in ABAQUS software has been used widely in the finite element (FE) analysis of reinforced concrete (RC) structures, but few studies were conducted to use the material model for the FE analysis of stirrup-confined concrete. The influence of uniaxial concrete compression stress-strain relation on the simulation results of the mechanical behavior of stirrup-confined concrete using DP model was studied. Three types of uniaxial concrete compression strain-stress relation curve for the definitions of compression behaviors of concrete were introduced in DP model to establish the corresponding three-dimensional nonlinear FE models of RC columns with the confinement effect of stirrups. Through comparison between the FE simulation and test results, it is concluded that it′s important for accuracy of simulating results that proper uniaxial compression stress-strain relation is adopted in the DP model, and it has good results if the proposed uniaxial concrete compression stress-strain relation curve is adopted in simulation of the confined concrete.
Keywords:stirrup\|confined concrete； confinement effect of stirrup； damaged plasticity model； uniaxial compression stress-strain relation； finite element modeling
*國家自然科學(xué)基金項(xiàng)目（51608156）,海南省自然科學(xué)基金面上項(xiàng)目（20165208）,海南大學(xué)科研啟動基金資助項(xiàng)目（kyqd1534）。
作者簡介：曾翔，博士，講師，Email: zeng_t08@163.com。
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