梁侧锚固钢板法加固混凝土梁的非线性有限元分析

Non-linear Finite Element Analysis of Bolted Side-plated Beams

以4根梁侧锚固钢板加固混凝土梁(BSP梁)受剪性能试验研究为基础,基于弹塑性有限元软件OpenSees,建立了BSP梁的非线性有限元模型,模拟了构件加载全过程和受剪破坏时的受力性能.模型中考虑了材料的非线性、钢板和混凝土梁交界面上滑移等.计算结果与试验结果吻合良好.并对影响BSP梁性能的主要参数进行分析,包括锚栓行数、纵向锚固间距、钢板高度、钢板厚度、钢板屈服强度、锚栓直径及混凝土强度等,得出了各参数对BSP梁受剪承载力和纵横向滑移的影响规律,为BSP法加固设计提供了依据.

Based on the experimental study of 4 bolted-side plates (BSP) beams, a numerical finite element analysis using OpenSees was conducted on the entire loading process and the shear failure of BSP beams.The nonlinear behaviors of materials and slip model on the interface between steel plate and concrete beam were taken into account. The results of the finite element analysis were found to be in good agreement with the experimental results. The main parameters affecting the behavior of BSP beams were analyzed, including the number of rows of anchor bolts, anchor bolt spacing along the beam, steel plate depth, steel plate thickness, yield strength of steel plate, anchor bolt diameter, concrete strength and so on. The results show the influence of the parameters on the shear bearing capacity, longitudinal and transverse slip, which provides basis for the strengthening design of BSP beams.