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自然灾害发生后,道路桥梁的快速修复对于救援工作尤为重要,而传统道路桥梁修复方法往往需要消耗较长的时间。该文基于可展结构的理念,提出了一种建造方便快捷的剪叉式应急桥梁,并对其设计原理进行了分析。结合桥梁建造和使用过程的实际情况,建立了两种典型状态下的平衡方程。针对轻型车辆以剪叉杆弯曲应力为控制应力设计了一座三剪式桥梁,并制作了一个全尺模型进行荷载试验,试验结果与理论分析结果较吻合,验证了设计方法的正确性和这种新型桥梁用于灾后应急救援的可行性。
After the natural disaster, the rapid repair of road and bridge is very important for rescue work, while the traditional road and bridge repair methods often take longer time. Based on the concept of extensible structure, this paper proposes a convenient and quick scissors emergency bridge, and analyzes its design principle. Combined with the actual situation of the bridge construction and use process, two typical equilibrium equations are established. Aiming at light-weight vehicle, a three-shear bridge was designed with bending stress of scissor bar as control stress, and a full-scale model was made for load test. The experimental results are in good agreement with the theoretical analysis to verify the correctness of the design method and this The feasibility of a new type of bridge for post-disaster emergency rescue.