折线配筋先张法工字梁荷载横向分布系数计算方法及横隔梁设计  

Calculation Method of Load Lateral Distribution Coefficient of I-Beam with Deviated Pretensioning Method and Design of Cross-Girder

作　　者：张哲元 林英 王建辉 邓青儿 张科乾 ZHANG Zheyuan;LIN Ying;WANG Jianhui;DENG Qinger;ZHANG Kegan(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《结构工程师》2022年第6期185-191,共7页Structural Engineers

摘　　要：折现配筋先张梁避免了后张法预应力混凝土梁在孔道施工工艺和耐久性能等方面的缺点,提高了预应力混凝土结构的力学适应性,因而在桥梁工程中有着广阔应用前景。在实际工程中常采用荷载横向分布系数的概念将空间多梁体系简化为单梁体系进行分析计算,但这种简化计算方法随着跨度、桥宽的增加和横隔梁间距的调整将对实际结构的空间受力状态产生不可忽视的影响。因此,本文建立折线配筋先张法工字梁空间三维有限元模型,着重研究折线配筋先张法工字梁的空间受力行为,通过比较各种荷载横向分布系数计算方法与实际空间受力的误差,提出合理适用的方法并通过研究横隔梁间距对主梁空间受力的影响,提出合理的设计参考值。The deviated pre-tensioned girder with discounted reinforcement avoids the shortcomings of posttensioned prestressed concrete girder in tunnel construction technology and durability, and improves the mechanical adaptability of prestressed concrete structure, so it has a broad application prospect in bridge engineering. In practical engineering, the concept of load transverse distribution coefficient is often used to simplify the spatial multi-beam system into single beam system for analysis and calculation. However, with the increase of span, bridge width and the adjustment of beam spacing, this simplified calculation method will have a significant impact on the spatial stress state of the actual structure. Therefore, this article established the three-dimensional finite element model of I-beam, this paper studies force behavior of I-beam, through comparing all kinds of load transverse distribution coefficient calculation method and the error of the actual space force, put forward the reasonable and applicable method by studying the transverse beam spacing on force of main girder space, put forward reasonable design reference.

关 键 词：折线配筋 工字梁 横向分布系数 空间受力 横隔梁间距 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]