纤维增强复合材料用于铁路桥限高防护架可行性研究

纤维增强复合材料具有抗拉强度高、质量轻等特点。根据既有铁路桥限高防护架的分类,提出采用玻璃纤维与聚氨酯拉挤成型工艺加工铁路桥限高防护架的方案,基于复合材料实际参数,设计横梁结构。理论分析结果表明:结构破坏荷载可以满足设计要求,结构自重较原钢管或钢管混凝土方案轻,掉落时对车辆驾驶室中人员的威胁降低,可充分发挥纤维增强复合材料的高抗拉性能和轻质化的特点。将纤维增强复合材料作为铁路桥限高防护架的材料具有可行性。

Feasibility Study on Application of Fiber Reinforced Composite Material in Height Limit Protective Frame for Railway Bridge

Fiber reinforced composite material has the characteristic of high tensile stress and light weight.According to the classification of existing height limit protective frame of railway bridge,the scheme of using glass fiber and polyurethane pultrusion technology to process the railway bridge height limit protective frame was proposed.Based on the actual parameters of composite materials,the girder structure was designed.The results of theoretical analysis show that the failure load of the structure can meet the design requirements,the self weight of the structure is lighter than the original steel tube or concrete-filled steel tubular structure scheme,the threat to the driver's cab is reduced when the structure is dropped,and the high tensile performance and light weight characteristics of the fiber reinforced composite materials can be fully exerted.It is feasible to use the fiber reinforced composite material in height limit protective frame for railway bridge.