铁路斜腹板简支箱梁温度应力计算方法研究

发布时间：2018-05-18 05:15

本文选题：预应力混凝土 + 简支箱梁　；参考：《铁道标准设计》2014年08期

【摘要】：温度应力是导致预应力混凝土桥梁结构产生裂缝的主要原因之一。为了研究箱梁温度应力分布规律,以盘营客运专线单线预制斜腹板箱梁为研究对象,分别采用规范计算法、考虑空间整体效应的温度应力计算法~([1])、有限元计算法3种方法,对箱梁温度应力进行系统的计算分析,并对各方法计算结果进行比较。结果表明,规范法未能考虑空间整体效应,是偏于不安全的,考虑空间整体效应的温度应力计算法与有限元计算法吻合较好。设计中应考虑空间整体效应的影响,方能得出与实际更吻合的应力结果。结合盘营客运专线简支箱梁温度应力计算结果,提出斜腹板箱梁温度应力的计算方法,为工程设计和施工提供可靠的依据。
[Abstract]:Thermal stress is one of the main causes of cracks in prestressed concrete bridge structure. In order to study the temperature stress distribution of box girder, the prefabricated inclined web box girder on single line of disco passenger dedicated line is taken as the object of study. The temperature stress calculation method ([1]) and finite element method (FEM) are used to calculate the temperature stress of the box girder by using the standard calculation method and the spatial integral effect respectively. The temperature stress of box girder is calculated and analyzed systematically, and the calculation results of each method are compared. The results show that the spatial global effect is not considered by the standard method, and the temperature stress calculation method with the spatial global effect is in good agreement with the finite element method. The effect of the whole space effect should be taken into account in the design so that the stress results which are more consistent with the actual conditions can be obtained. Based on the calculation results of temperature stress of simply supported box girder of disco passenger dedicated line, the calculation method of temperature stress of inclined web box girder is put forward, which provides a reliable basis for engineering design and construction.
【作者单位】：铁道第三勘察设计院集团有限公司;
【分类号】：U441.5

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