连续箱梁腹板斜裂缝分析和防治  

Analysis and Cure about Inclined Crack for Ventral Plank Section in Continuous Box Beam

作　　者：舒彬[1] 杨少文[2] 

机构地区：[1]陕西铁路工程职业技术学院,陕西渭南714000 [2]西安公路研究所,西安710054

出　　处：《四川理工学院学报（自然科学版）》2008年第4期105-107,共3页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

摘　　要：连续箱梁采用纵向直线预应力和竖向预应力相结合时,施工方便,采用薄壁腹板可以提高挖空率,减轻结构自重;,但竖向预应力本身很不可靠,过薄的腹板降低了本身的抗剪作用和结构的整体性,腹板截面容易出现斜裂缝,影响结构的使用寿命。在设计和施工中应加以防治。When longitudinal linear prestressed reinforcement and vertical prestressed reinforcement has been adopted in continuous box beam, it becomes convenient for construction. It can improve hollow rate and lighten deadweight of structure to use thinnest ventral plank. But the availability of vertical prestressed reinforcement is irresponsible, thinnest ventral plank is bad to unitary of the structure too. It is easy to produce inclined crack for ventral plank section, reduce it shear resistant ability and useful life.

关 键 词：箱梁腹板 薄壁 斜裂缝 纵向直线预应力 纵向曲线预应力 有限元分析 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]