薄钢板剪力墙结构滞回行为研究

发布时间：2019-06-06 19:06

【摘要】：为研究薄钢板剪力墙结构的滞回行为,采用通用有限元分析软件ABAQUS建立其非线性有限元分析模型,并对计算平台、单元选取、网格划分、初始缺陷施加及材料循环本构模型等予以介绍。结合国内外已有的钢板剪力墙拟静力试验,验证了提出的分析模型能够准确地模拟由于平面外变形、局部屈曲、塑性应变累积等因素造成的承载力和刚度退化、曲线捏拢等,并预测了结构的破坏形态。在此基础上,结合试验结果以及有限元分析结果对钢板剪力墙的滞回性能、承载性能、耗能行为、损伤退化特征以及断裂性能进行分析。试验和有限元分析结果均表明:不同的钢板剪力墙局部构造会影响结构的滞回性能、耗能能力、损伤退化行为以及承载性能;开竖缝钢板剪力墙能够显著提高结构的耗能能力,改善曲线捏拢情况,但其承载力有较大降低;加劲钢板剪力墙承载性能有所提高,但其荷载-位移滞回曲线仍然存在明显的捏拢现象,因此在实际工程中需要对加劲肋的尺寸进行优化,使其能够提供足够的约束,有效提高结构抗震性能。
[Abstract]:In order to study the hysteretic behavior of thin steel plate shear wall structure, the nonlinear finite element analysis model is established by using the general finite element analysis software ABAQUS, and the calculation platform, element selection and grid division are also discussed. The application of initial defects and the cyclic constitutive model of materials are introduced. Combined with the existing quasi-static tests of steel plate shear walls at home and abroad, it is verified that the proposed analysis model can accurately simulate the degradation of bearing capacity and stiffness caused by out-of-plane deformation, local buckling, plastic strain accumulation and other factors, such as curve kneading, etc. The failure mode of the structure is predicted. On this basis, combined with the test results and finite element analysis results, the hysteretic performance, bearing capacity, energy consumption behavior, damage degradation characteristics and fracture performance of steel plate shear walls are analyzed. The results of test and finite element analysis show that different local structures of steel plate shear wall will affect the hysteretic performance, energy consumption capacity, damage degradation behavior and bearing capacity of the structure. The steel plate shear wall with vertical joints can significantly improve the energy consumption capacity and curve kneading of the structure, but its bearing capacity is greatly reduced. The bearing capacity of stiffened steel plate shear wall is improved, but there is still obvious kneading phenomenon in its load-displacement hysteretic curve, so it is necessary to optimize the size of stiffener in practical engineering so that it can provide sufficient constraints. Effectively improve the seismic performance of the structure.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：中央高校基本科研业务费专项资金项目(2014JBM074) 中国博士后科学基金面上项目(2014M550021)
【分类号】：TU398.9

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