非重力荷载作用下平面曲线梁桥的设计

Design of Plane Curve Beam Bridge under Non-gravity Load

采用有限元法对某在建互通立交匝道的小半径、宽桥面钢筋混凝土曲线现浇连续箱梁桥,在非重力荷载作用下的内力及墩梁相对变形进行分析。得出该类桥型在非重力荷载作用下的内力响应及变形特点。利用温度作用下曲线梁桥横向变形量较小的特点,适当降低支座横向约束刚度,优化支座布置形式,并采用合理的横向约束措施,使得各支座水平径向温度作用力趋于均匀,且不产生较大的横向变位。

The finite element method is used to analyze the internal force and relative deformation of pier beam under non-gravity load of a curved in-situ reinforced concrete continuous box beam bridge with small radius and wide deck of an interchange ramp under construction. The internal force response and deformation characteristics of this kind of bridge under non-gravity load are achieved. The utilization of small lateral deformation of curved beam bridge under the action of temperature, suitable reduction of horizontal restrainrigidity of support, optimization of support layout type and taking of reasonable horizontal restrain measures can make the horizontal radial temperature acting forces of all supports tend to uniform, and do not produce the large lateral displacement.