变截面箱型连续梁桥荷载效应有限元分析
薛 刚 , 孙晓燕
（内蒙古科技大学建筑与土木工程学院,内蒙古包头 014010）
关键字：混凝土箱梁；温度场；ANSYS模拟
中图分类号：TU378.2 文献标识码：A
中文摘要：在变截面连续箱型梁桥影响线的基础下，利用有限元模型对包头黄河大桥进行了最不利荷载工况的模拟，并综合分析了该桥的应力状态和变形情况，结果显示，预应力钢筋与混凝土节点耦合处有应力集中现象，全桥的其他区域应力分布均匀、协调，桥梁在正常工作状态下，截面的最大应力比约为0.5，有较好的安全储备。
The finiteelement analysis on the load effect of the continuous variable cross-sectionbox girder bridges
Xue Gang1, Sun Xiaoyan1
(1.Architecture and Civil Engineering School , Inner Mongolia University of Science Technology, Baotou, 014010, China)
Key words: Concrete box girder; Temperaturefield; ANSYS simulation
Abstract：Based on the influenceline of the second Baotou Yellow River Bridge, the case for the response of themodel under the most unfavorable load was simulated. The state of stress anddeformation were analyzed comprehensively.The result shows that the stress iswell-distributed and coordinated entirely and the working compress stress levelis about 50%, with the stress concentration occurred in the region of localboundary and coupling nodes of the concrete and the prestress steel. The wholebridge has a good safety reservation.