摘要
对某悬浇预应力连续箱梁纵向预应力下弯钢束张拉后,腹板沿着波纹管出现裂纹的现象进行了分析,并分别用拉-压杆模型、三维实体有限元模型和钢筋混凝土非线性有限元模型进行了计算,总结了腹板开裂的主要原因,提出了裂纹控制措施的建议,可为预应力连续箱梁的合理设计和同类问题的处理提供参考。
According to web cracks along the bellows of a prestressed continuous box girder bridge in cantilever construction, this paper analyses the main causes of cracks by strut-and-tie mode, 3-D finite element model and nonlinear finite element model of reinforced concrete. And the reasonable proposal is given based on the the mechanical mechanism. The suggestions for the prevention of web cracks and the design of prestressing tendon are also given. The results could be taken as reference for similar problem.
出处
《现代交通技术》
2009年第3期37-40,共4页
Modern Transportation Technology
关键词
预应力箱梁
腹板裂纹
拉-压杆模型
有限元
钢筋混凝土
防治措施
prestressed concrete box girder
web crack
strut-and-tie mode
finite element
reinforced concrete
prevention measures
