波形钢腹板PC连续刚桥和PC连续刚构桥受力性能分析
2021-02-11卢伟荣付清华马光花
卢伟荣 付清华 马光花


摘要: PC连续刚构桥的箱梁腹板用波形钢板替代,形成一种新型组合结构,利用波形钢腹板能够较好地弥补预应力混凝土连续刚构桥受力的不足。根据国内外研究资料,利用有限元软件从静力性能和动力特性两个方面比较分析了波形钢腹板PC连续刚桥(SPC)与普通PC连续刚构桥(PC)的受力性能,探讨波形钢腹板PC连续刚桥设计中的优势具有比较大的实际意义,能够为该类桥在国内的工程应用提供参考。
关键词:波形钢腹板 PC连续刚构桥有限元受力性能分析
中图分类号:U443 文献标识码:A 文章编号:1672-3791(2021)12(a)-0000-00
Analysis on Mechanical Properties of PC Continuous Rigid Bridge and PC Continuous Rigid Frame Bridge with Corrugated Steel Webs
LU Weirong FU Qinghua MA Guanghua
(Gansu Vocational and Technical College of Communications,Lanzhou,Gansu Province,730070 China)
Abstract:The box girder web of PC continuous rigid frame bridge is replaced by corrugated steel plate to form a new composite structure. The corrugated steel web can make up for the lack of stress of prestressed concrete continuous rigid frame bridge. According to the research data at home and abroad, the mechanical properties of PC continuous rigid bridge with corrugated steel web (SPC) and ordinary PC continuous rigid frame bridge (PC) are compared and analyzed by using finite element software from two aspects of static performance and dynamic characteristics. It is of great practical significance to discuss the advantages of PC continuous rigid bridge with corrugated steel web in design. It can provide reference for the engineering application of this kind of bridge in China.
Key Words:Corrugated steel web;PC continuous rigid frame bridge;The finite element;Mechanical behavior analysis
普通箱梁的钢筋混凝土腹板用8~25 mm的波形钢板替代,形成波形钢腹板PC组合箱梁。这种组合箱梁的钢腹板以受剪为主,箱梁的混凝土底、顶板以受弯为主,充分发挥了钢板抗剪、混凝土抗压的材料特性,使材料的使用效率得到了提高,主梁轻型化的目标能够有效地实现,并且使桥下的工程量和费用进一步减小,因此这种新型组合结构在桥梁方面有着非常好的应用前景[1-2]。
波形钢腹板的研究主要集中在抗弯、抗剪、抗扭、畸变以及参数设计、屈曲特性、抗剪连接分析、桥面板的有效分布宽度、剪力滞效应等方面,在大跨度波形钢腹PC连续刚构桥的受力性能方面研究很少。該文依托某座在建的波形钢腹板PC连续刚构桥,利用限元软件通过比较波形钢腹板PC连续刚桥和PC连续刚构桥的受力,分析了它的受力性能。
1 波形钢腹板PC连续刚桥和……
