摘要
钢箱梁与混凝土箱梁相比质强比低,具有抗扭刚度大,自重轻,强度高,施工周期短等优点,在城市高架跨路口处广泛运用。曲线钢箱梁由于"弯一扭"耦合作用,易出现曲线内外侧支座受力不均,甚至内侧支座脱空的状态,对抗倾覆稳定性不利。通过对最不利倾覆轴,端支座间距,支座转角三个方面研究,形成抗倾覆验算的标准,并运用于具体工程实例。
Compared with the concrete box girder, the steel box girder is stronger than the low quality, has the advantages of high torsional rigidity, light dead weight, high strength and short construction period, and is widely used in the urban viaduct spanning intersection. The curve steel box girder is easy to cause the uneven forces on the inner and outer supports of curve, and even the inner support is empty because of "bend-twist coupling effect, which will be harmful to the anti-overturning stability. The analysis on three aspects of the most unfavorable tumble axis, end support spacing and support corner forms the anti-overturning checking calculation standards, which are used for the engineering practices.
出处
《城市道桥与防洪》
2018年第9期121-125,共5页
Urban Roads Bridges & Flood Control
关键词
钢箱梁
抗倾覆
最不利倾覆轴
端支座间距
支座转角
steel box girder
anti-overturning
the most unfavorable tumble axis
end support spacing
support corner
