陈庆军, 余梅霞, 李冰州, 凌育洪, 梁竣杰, 左志亮. 基于ABAQUS的MVLEM模型及其在RC剪力墙抗震分析中的研究[J]. 工程力学, 2021, 38(8): 192-203. DOI: 10.6052/j.issn.1000-4750.2020.10.0779
引用本文: 陈庆军, 余梅霞, 李冰州, 凌育洪, 梁竣杰, 左志亮. 基于ABAQUS的MVLEM模型及其在RC剪力墙抗震分析中的研究[J]. 工程力学, 2021, 38(8): 192-203. DOI: 10.6052/j.issn.1000-4750.2020.10.0779
CHEN Qing-jun, YU Mei-xia, LI Bing-zhou, LING Yu-hong, LIANG Jun-jie, ZUO Zhi-liang. MVLEM MODEL DEVELOPMENT BASED ON ABAQUS AND ITS APPLICATION IN ASEISMIC ANALYSIS OF RC SHEAR WALL[J]. Engineering Mechanics, 2021, 38(8): 192-203. DOI: 10.6052/j.issn.1000-4750.2020.10.0779
Citation: CHEN Qing-jun, YU Mei-xia, LI Bing-zhou, LING Yu-hong, LIANG Jun-jie, ZUO Zhi-liang. MVLEM MODEL DEVELOPMENT BASED ON ABAQUS AND ITS APPLICATION IN ASEISMIC ANALYSIS OF RC SHEAR WALL[J]. Engineering Mechanics, 2021, 38(8): 192-203. DOI: 10.6052/j.issn.1000-4750.2020.10.0779

基于ABAQUS的MVLEM模型及其在RC剪力墙抗震分析中的研究

MVLEM MODEL DEVELOPMENT BASED ON ABAQUS AND ITS APPLICATION IN ASEISMIC ANALYSIS OF RC SHEAR WALL

  • 摘要: 多垂杆单元模型(MVLEM)通常被用于钢筋混凝土剪力墙的抗震分析中。基于ABAQUS创建了多垂杆单元模型(ABA-MVLEM),建立了适用于纤维梁单元的混凝土和钢筋的本构模型,开发了二线型原点指向型弹簧UEL单元,并编制了ABA-MVLEM的参数化建模程序。为验证该文模型的准确性,制作了3片RC剪力墙试件并对其进行了低周反复加载试验,将试验数据与该文数值模拟结果进行对比,表明了该模型(ABA-MVLEM)模拟精度较高,可满足工程精度要求。在RC剪力墙抗震研究的应用中,ABA-MVLEM模型既可表征结构的整体响应,也可从材料层次进行细致分析,具有分析高效性和结果可视化的优点。进一步利用此模型进行参数化分析,探究高宽比、轴压比对RC剪力墙抗震性能的影响,计算发现:在相同侧向位移下,增大高宽比,RC剪力墙构件承载力显著降低,但刚度退化较为平缓;在轴压比n≤0.5时,提高轴压比对小高宽比构件的承载力提升更加明显。

     

    Abstract: Multiple-vertical-line-element model (MVLEM) is usually used in aseismic analysis of reinforced concrete shear walls. Based on ABAQUS, the multiple-vertical-line-element model (ABA-MVLEM) was developed. The suitable constitutive model of concrete and steel bars for a fiber beam element was established, the origin-oriented hysteresis model was developed, and the parametric modeling program of ABA-MVLEM was carried out. To verify the accuracy of the model provided, the low-cycle reversed loading tests were conducted on three RC shear walls. Comparing the numerical simulation results with the test data shows that the model (ABA-MVLEM) has high simulation accuracy and can meet the requirements of engineering precision. In the aseismic research of RC shear walls, ABA-MVLEM model can represent the structure's overall response and obtain detailed analysis results from the material level. The model has the advantages of high computational efficiency and visualization of simulation results. Furthermore, the influence of aspect ratio and axial compression ratio on aseismic performance of RC shear wall were explored through this model. The results show that: under the same lateral displacement, the bearing capacity of the RC members decreases significantly with the increase of the aspect ratio, but the stiffness degradation is gentle. The bearing capacity of the members with a small aspect ratio increases more obviously with the increase of axial compression ratio n in the case of n≤0.5.

     

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