迄今为止,预应力混凝土桥梁均采用高强度钢材作为预应力材料,在腐蚀环境地区,因钢材腐蚀造成混凝土裂纹和剥离,导致桥梁报废。所以,人们一直在寻找一种能取代钢材而不会锈蚀的预应力材料。1988年日本首次采用高强度碳素纤维复合材料(以下称CFRP)建造了世界上第一座预应力混凝土公路桥 So far, the prestressed concrete bridges are made of high-strength steel as a prestressed material, in the corrosive environment, due to steel corrosion caused by concrete cracking and peeling, resulting in the bridge scrapped. Therefore, people are always looking for a prestressed material that can replace steel without rusting. In 1988, Japan first used high-strength carbon fiber composite materials (hereinafter referred to as CFRP) to build the world’s first prestressed concrete highway bridge