摘要
以某现浇混凝土大桥为例,通过专业软件对该工程大桥结构稳定性进行了复核验算,结果表明:对持久状况正常使用抗裂验算时,荷载短期效应下截面下缘均承受压应力,上缘的最大拉应力值大小为0. 91MPa,而在正常使用荷载长期效应下均受压,并未出现拉应力,满足要求;主梁截面混凝土法向压应力最大包络和最大主压应力同样满足要求;对持久状况构件应力验算时,使用阶段正截面混凝土法向压应力和斜截面混凝土主压应力均满足规范要求;持久状况和短暂状况下构件承载能力均满足要求;主桥在使用阶段时最大挠度满足要求,且支座选型也满足要求。
This paper mainly takes a River Bridge as an example,and reviews the structural stability of the engineering bridge through professional software.The results show that when the crack resistance check is normal for the permanent condition,the lower edge of the section is subjected to compressive stress under the short-term effect of the load,and the maximum tensile stress value of the upper edge is0.91MPa,which is under the long-term effect of the normal use load,and there is no tensile stress,which satisfies the requirements;the maximum envelope and maximum principal compressive stress of the normal girder concrete of the main girder section also meet the requirements;for the permanent stress analysis of the component,the normal cross-section concrete normal compressive stress and the inclined concrete main compressive stress meets the requirements of the specification;the bearing capacity of the component meets the requirements under the permanent condition and the transient condition;the maximum deflection of the main bridge meets the requirements during the use phase,and the support selection also meets the requirements.
作者
卫高红
WEI Gao-hong(Shanxi Transportation Research Institute, Taiyuan 030006, China)
出处
《北方交通》
2018年第12期26-30,共5页
Northern Communications
关键词
现浇混凝土桥梁
结构稳定性
复核验算
Cast-in-place concrete bridge
Structural stability
Review and verification
