唐 硕1,喻孟雄2,丁权福1,徐晓燕3,明 勇1
锈蚀预应力筋混凝土梁受弯承载性能有限元分析
唐 硕1,喻孟雄2,丁权福1,徐晓燕3,明 勇1
摘 要:利用ANSYS建立了预应力混凝土梁分离式有限元模型,实现了预应力筋锈蚀后混凝土构件静力承载性能的模拟,分析了预应力筋锈蚀对预应力混凝土构件极限承载力、刚度和破坏形式的影响。结果表明:随着预应力筋锈蚀率的增加,构件的极限荷载和刚度降低,梁顶应变增加,塑性变形能力变差,破坏由延性向脆性发展。
Abstract: Finite element model with disconnect-type of prestressed reinforced concrete beams is established by using ANSYS, the simulation of static load capacity for prestressed tendons with corroded concrete member is achieved, the influence of corroded prestressed tendons on ultimate bearing capacity, stiffness and destructional forms of prestressed concrete members are analyzed. The results show that, with the increase of corrosion rate of prestressed tendons, the ultimate load and stiffness of the member are decreased, meanwhile, the strain of beam is increased, the plastic deformation ability becomes worse, and the failure is developed from the ductile to brittle.
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