一种以形状记忆合金材料包裹受损支柱的桥梁修复新技术,最近由美国科学家研发成功。这种金属材料能够“记住”之前的形状,经过高温加热后可以恢复原状,从而使受损桥梁得到修复,并变得比以前更加坚固。地震发生时,新建的现代桥梁往往会弯曲但不会断裂,而年代较久的旧桥则可能遭受严重损伤。传统的修复方法,通常是使用纤维增强聚合物或混凝土加固。虽然纤维增强聚合 A bridge repair technique that shapes damaged steel columns with shape memory alloy material has recently been successfully developed by American scientists. This metallic material “remembers” the shape before it can be restored to its original shape after being warmed at high temperatures, repairing the damaged bridge and becoming more robust than ever before. When an earthquake struck, the newly constructed modern bridge tended to bend but not break, while older bridges could be severely damaged. Traditional methods of repair are usually reinforced with fiber-reinforced polymers or concrete. Although fiber-reinforced polymer