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Widening Methods of Existing Cast-in-Situ Continuous Curved Beams

机译：既有现浇连续弯梁的加宽方法

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An existing cast-in-situ continuous curved bridge was located at the acceleration lane of a new Interchange, widening was needed to meet the width requirements. The original lateral bump walls of the bridge were removed, cantilever sections of beam were cut off about 50cm, and medial bump walls were replaced with corrugated guardrails for balance. With the help of the finite element modeling, conditions of limit and normal state with different load combinations were analyzed. The results, numerical simulations of ultimate flexural capacity and stress of both the top and bottom sides under normal state, showed that the widening project was practicable. On the basis of numerical simulations, vertical deformations between exiting and new beams under using stage were calculated, and by comparison on advantages and disadvantages of different splicing scheme, Polyurethane elastic expansion joint was finally recommended to treat Joints between new and old beams.
机译：现有的现浇连续弯桥位于新的立交处的加速车道上，需要加宽以满足宽度要求。拆除了桥梁的原始外侧防撞墙，将梁的悬臂部分切掉了约50cm，并用波纹状护栏代替了内侧防撞墙以保持平衡。借助有限元建模，分析了不同载荷组合下的极限状态和正常状态。结果表明，在正常状态下顶侧和底侧的极限抗弯能力和应力的数值模拟表明，拓宽工程是可行的。在数值模拟的基础上，计算了使用阶段出口和新梁之间的竖向变形，并通过比较不同拼接方案的优缺点，最终建议采用聚氨酯弹性伸缩缝来处理新旧梁之间的节点。

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