基于纤维单元的预应力预制混凝土剪力墙抗侧性能数值分析

发布时间：2018-06-24 08:10

本文选题：预应力预制混凝土 + 剪力墙　；参考：《建筑结构学报》2017年01期

【摘要】：为研究预应力预制混凝土剪力墙的抗侧性能,在试验研究的基础上,提出并建立了基于纤维单元的非线性有限元分析模型。该模型在常规柔度法纤维梁柱单元模型的基础上,对单元塑性区积分法加以改进,提出了更加适用于混凝土结构的积分方法。为考虑墙底钢筋与混凝土的黏结滑移及剪切变形,引入两个零长度单元,提出了零长度单元的构建和参数取值建议。该分析模型对试验中虽未观察到,但可能发生的失效模式(如预应力筋失效等)给予考虑,对试件墙片水平荷载-位移滞回特征、预应力筋应力、墙角接缝张开、残余变形指标等进行模拟并与试验结果进行比较,结果表明两者较为吻合,验证了该分析模型的合理性和有效性。
[Abstract]:In order to study the lateral behavior of prestressed precast concrete shear wall, a nonlinear finite element analysis model based on fiber element is proposed and established on the basis of experimental study. This model is based on the conventional flexibility method fiber Liang Zhu element model and improves the element plastic zone integration method and puts forward a more suitable integral method for concrete structure. In order to consider the bond slip and shear deformation of reinforcing bar and concrete at the bottom of the wall, two zero length elements are introduced, and the construction of zero length element and the suggestion of parameter selection are put forward. The model takes into account the failure modes (such as the failure of prestressed tendons, etc.) that may occur in the test, including the horizontal load-displacement hysteretic characteristics, the stress of the prestressed tendons, the opening of the corner joints, and so on. The residual deformation indexes are simulated and compared with the experimental results. The results show that the two models are in good agreement with each other and verify the rationality and validity of the analytical model.
【作者单位】：同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金重大研究计划(91315301-4),国家自然科学基金重大国际合作项目(51261120377)
【分类号】：TU378

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