一种快速架设的充气式桥梁结构研究

Study on a Kind of Fast Erection Inflatable Bridge Structure

摘要: 创新发明了一种新型的快速架设的充气式桥梁结构体系，主体由充气环和其上的桥面承载板构成。以充气环为竖向支撑基本受力构件，充气环既可以单环独形成支撑，又可以多个单环并列拼装成一组形成支撑，当桥梁跨越山谷时，充气环可以作为支撑单元在桥梁跨度方向形成竖向支撑，从而减少桥面支撑距离，多组充气环之间以及充气环和两侧山谷之间形成填充嵌锁关系后，可以进一步减少桥面沿跨度方向支撑点的距离，从而减小桥面承载板的厚度，实现快速拼装、快速架设的目的。用于桥梁承载的充气环一般为高压充气，其内压为0.2 Mpa~0.7 Ma。基于ABAQUS计算分析软件，对充气式桥梁的刚度及强度进行了初步验证，计算分析表明：在结构承载强度及刚度方面，这种结构体系是可行的。在构件的拼接、连接及结构体系稳定方面尚需进一步深入研究。

Abstract: A new type of rapidly erected inflatable bridge structure system is innovatively invented. The main body is composed of inflatable ring and deck bearing plate. With inflatable support ring as the basic stress component, the inflatable ring can form support by single ring alone, and multiple single ring can be assembled in a group to form a support. When the bridge crosses the valley, the inflatable ring can be used as the support unit to form vertical support in the direction of bridge span, so as to reduce the bridge deck support distance, and form filling between multiple groups of inflatable rings and between the inflatable ring and the valleys on both sides. After the interlocking relationship, the distance of supporting points along the span direction of the bridge deck can be further reduced, so as to reduce the thickness of the bearing plate on the bridge deck, and realize the purpose of rapid assembly and rapid erection. The inflatable ring used for bridge bearing is usually high-pressure inflation, and its internal pressure is 0.2 MPa~0.7 Ma. Based on ABAQUS calculation and analysis software, the stiffness and strength of inflatable bridge are preliminarily verified. The calculation and analysis show that the structural system is feasible in terms of bearing strength and stiffness. Further research is needed in the aspects of component splicing, connection and structural system stability.