某GFRP拼装式桁架人行桥的动力学性能及耐久性

DYNAMIC CHARACTERISTICS AND DURABILITY OF AN ALL COMPOSITES TRUSS PEDESTRIAN BRIDGE

拉挤GFRP型材具有出色的力学性能和稳定的抗腐蚀能力,因此在桥梁结构中具有广阔的应用前景。作为一种较新的结构材料,GFRP桥梁的应用时间较短,对其动力学性能及耐久性的研究还不够充分。本文基于对瑞士某全GFRP复合材料人行桥的研究,对其动力学性能和耐久性做出了评估,并和实验结果对比。结果表明,经过8年的使用,此人行桥完全满足承载力极限状态和正常使用极限状态的要求。

Because of the excellent mechanical properties and corrosion resistance,glass fibre reinforced polymer composites exhibit obvious potential for bridge construction.However,as relatively new materials used in bridge construction,studies on their dynamical response and durability are still in the early stage.In this paper,the structural assessment of a pedestrian bridge has been carried out in terms of dynamic performance.Based on the result from these experimental investigations,the durability of the bridge was justified.And the structural functionality and safety still satisfy the relevant requirements after 8 years＇service.