摘要
为探讨钢管混凝土拱桥拱肋的最优混凝土灌注方式,依托某新建中承式哑铃形钢管混凝土拱桥工程,借助MIDAS/CIVI软件建立拱桥结构的有限元计算模型,针对3种混凝土灌注拱肋的施工阶段进行应力、变形及稳定性对比分析,得出以下结论:①随着施工阶段的增加,3种混凝土灌注方式下拱肋的最大拉应力均逐渐增大,而稳定性系数均逐渐减小;②不同混凝土灌注方式下拱肋的最大压应力、竖桥向变形均随着施工阶段的增加呈先减小后增大变化;③不同混凝土灌注方式下各施工阶段的拱肋应力、变形f由大到小均为:C50、C60、LC60,而稳定性系数则为φ(LC60)>φ(C60)>φ(C50),故LC60高强次轻混凝土为拱肋最佳灌注方式。
In order to discuss the optimal concrete pouring mode of arch ribs of concrete-filled steel tubular arch bridge, based on a newly built dumbbell concrete-filled steel tubular arch bridge project, the finite element calculation model of arch bridge structure is established with the help of Midas/civi software, and the stress, deformation and stability of three kinds of concrete cast-in-place arch ribs are compared and analyzed, and the following conclusions are drawn:①with the increase of construction stage, The maximum tensile stress of arch ribs increases gradually, but the stability coefficient decreases gradually under the three kinds of concrete filling modes.②the maximum compressive stress and vertical bridge deformation of arch ribs under different concrete filling modes are all along with the construction stage. The increase decreased before increasing;③The arch rib stress of various construction stages under different concrete pouring modes is:C50>C60>LC60, and the stability coefficient is φ(LC60)>φ(C60)>φ(C50).Therefore, LC60 high-strength and light concrete is the best method of arch rib.
作者
张忠
丁敬荣
刘鲁涛
孔凡光
ZHANG Zhong;DING Jingrong;LIU Lutao;KONG Fanguang(Liaocheng Highway Engineering Corporation,Liaocheng,Shandong 252000,China)
出处
《公路工程》
北大核心
2020年第4期158-161,共4页
Highway Engineering
基金
山东省交通运输科技计划项目(2017B98)。
关键词
桥梁工程
钢管混凝土拱桥
拱肋灌注
变形
稳定性
bridge engineering
concrete-filled steel tubular arch bridge
arch ribbed pouring
deformation
stability
