装配式后张预应力混凝土简支板梁桥设计验算方法研究

RESEARCH ON THE DESIGN AND CALCULATION METHOD OF PREFABRICATED AND POST-TENSIONED PRESTRESSED SIMPLY SUPPORTED GIRDER BRIDGES

小跨度桥梁设计普遍存在于市政工程项目中,以某市政典型跨河段项目为研究对象,选取16 m装配式后张预应力混凝土简支板梁桥进行跨河桥梁设计、分析和验算,最终得到以下结论:首先,针对装配式后张预应力混凝土简支板梁桥的设计验算,给出了二维梁单元设计验算的方法;其次,通过与规范要求进行比对,验证了本项目中桥梁设计的合理性;最后,研究成果可为类似跨度不大于16 m的桥梁在选择装配式预应力混凝土简支板形式时提供相关依据。

The design of small span bridges is commonly found in municipal engineering projects.Taking a typical cross river section project of a municipal project as the research object,a 16 meter prefabricated post tensioned prestressed concrete simply supported slab beam bridge was selected for cross river bridge design,analysis,and verification.The following conclusions were obtained:Firstly,a two-dimensional beam element design verification method was provided for the design verification of the prefabricated post tensioned prestressed concrete simply supported slab beam bridge;Secondly,the rationality of the bridge design in this project was verified by comparing it with the regulatory requirements;Finally,the research findings can provide relevant basis for selecting the form of"prefabricated prestressed concrete simply supported slab"for bridges with a span of no more than 16 meter.