波纹钢腹板预应力混凝土箱梁的受力性能研究
发布时间：2018-08-11 17:49
【摘要】：波纹钢腹板体外预应力混凝土箱梁是一种新的桥梁结构形式，它由混凝土顶底板、预应力筋和波纹钢腹板三者构成的组合结构，可以有效地改善梁的力学性能。近年来，许多桥梁中都采用了波纹钢腹板预应力箱梁这种结构形式，，但是波纹钢腹板预应力箱梁的力学性能仍然比较少。因此，论文对波纹钢腹板预应力箱梁的受力性能进行研究具有重大的现实意义。 文章在大量查阅国内外相关资料后，总结了波纹钢腹板预应力箱梁的发展历史及研究现状，介绍了波纹钢腹板预应力箱梁的相关计算理论。通过建立有限元计算模型，对波纹钢腹板预应力箱梁的抗弯性能进行了分析，对抗剪性能的相关影响因素进行了较为深入的研究。 研究表明，波纹钢腹板预应力箱梁的弯曲正应变在梁高方向的分布符合“拟平截面假定”，弯曲正应力在横桥向的分布存在明显的剪力滞现象。在抗剪方面，钢腹板的抗剪承载力会随着板厚度、斜板倾角的增大而增大，波高、直板段宽度、梁高的增大会降低波纹钢腹板的抗剪承载力，其中梁高是控制钢腹板抗剪承载力的关键因素。论文得出的波纹钢腹板预应力箱梁在抗弯、抗剪方面的相关结论可以在该桥型的设计中进行参考。
[Abstract]:Corrugated steel web external prestressed concrete box girder is a new type of bridge structure, which is composed of concrete top and bottom slab, prestressed tendons and corrugated steel webs, which can effectively improve the mechanical properties of the beam. In recent years, corrugated steel web prestressed box girder is used in many bridges, but the mechanical properties of corrugated steel web prestressed box girder are still few. Therefore, it is of great practical significance to study the mechanical behavior of corrugated steel web prestressed box girder. In this paper, the development history and research status of corrugated steel web prestressed box girder are summarized, and the calculation theory of corrugated steel web prestressed box girder is introduced. The bending behavior of corrugated steel web prestressed box girder is analyzed by establishing the finite element model. The results show that the distribution of normal bending strain in the high direction of corrugated steel web prestressed box girder conforms to the "pseudo-plane section assumption", and the distribution of bending normal stress in the transverse direction of the bridge has obvious shear lag phenomenon. In the aspect of shear resistance, the shear bearing capacity of steel web will increase with the thickness of plate and inclined angle of inclined plate. The increase of wave height, width of straight plate and beam height will reduce the shear capacity of corrugated steel web. The beam height is the key factor to control the shear capacity of steel web. The conclusions of corrugated steel web prestressed box girder in bending and shear resistance can be used for reference in the design of the bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.213
本文编号：2177764
[Abstract]:Corrugated steel web external prestressed concrete box girder is a new type of bridge structure, which is composed of concrete top and bottom slab, prestressed tendons and corrugated steel webs, which can effectively improve the mechanical properties of the beam. In recent years, corrugated steel web prestressed box girder is used in many bridges, but the mechanical properties of corrugated steel web prestressed box girder are still few. Therefore, it is of great practical significance to study the mechanical behavior of corrugated steel web prestressed box girder. In this paper, the development history and research status of corrugated steel web prestressed box girder are summarized, and the calculation theory of corrugated steel web prestressed box girder is introduced. The bending behavior of corrugated steel web prestressed box girder is analyzed by establishing the finite element model. The results show that the distribution of normal bending strain in the high direction of corrugated steel web prestressed box girder conforms to the "pseudo-plane section assumption", and the distribution of bending normal stress in the transverse direction of the bridge has obvious shear lag phenomenon. In the aspect of shear resistance, the shear bearing capacity of steel web will increase with the thickness of plate and inclined angle of inclined plate. The increase of wave height, width of straight plate and beam height will reduce the shear capacity of corrugated steel web. The beam height is the key factor to control the shear capacity of steel web. The conclusions of corrugated steel web prestressed box girder in bending and shear resistance can be used for reference in the design of the bridge.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U448.213
【参考文献】
相关期刊论文 前3条
1 余杰;韩勇;王文林;万水;李超;余晓红;蒋丽娟;;泼河大桥的构造与施工[J];交通科技;2005年06期
2 袁安华,陈建兵,万水,卢炳灿;波形钢腹板PC组合连续箱梁人行桥设计介绍[J];苏州科技学院学报(工程技术版);2004年03期
3 刘磊,钱冬生;波纹钢腹板的受力行为[J];铁道学报;2000年S1期
相关博士学位论文 前1条
1 杨明;波纹钢腹板箱梁桥转向装置和剪力连接件理论与实验研究[D];哈尔滨工业大学;2008年
本文编号：2177764
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