采用ECC和SMA筋塑性铰梁的弹塑性地震响应分析

Elastoplastic Seismic Response Analysis of Plastic Hinged Beams Using ECC and SMA Reinforcement

在E2地震作用下,钢筋混凝土桥梁的墩柱会进入塑性阶段。为了提高高烈度地震区桥梁墩柱的韧性,将高延性纤维增强水泥基复合材料(ECC)和形状记忆合金材料(SMA)引入桥梁工程中,充分发挥ECC材料的高强度以及SMA材料的超弹性,保护高烈度地震区桥梁免遭地震的破坏并提高震后可恢复性能。研究结果显示:该技术在混凝土墩底曲率延性和滑动支座最大剪切位移方面有较大指导和借鉴意义。

Under the action of E2 earthquake,the piers of reinforced concrete bridges will enter the plastic stage.In order to improve the toughness of bridge piers in high-intensity earthquake areas,high ductility fiber-reinforced cementitious composites(ECC)and shape memory alloys(SMA)were introduced into bridge engineering to give full play to the high strength of ECC materials and the superelasticity of SMA materials.,to protect bridges in high-intensity seismic areas from earthquake damage and improve post-earthquake recoverability.The research results show that the technology has great guiding and reference significance in the curvature ductility of concrete pier bottom and the maximum shear displacement of sliding bearing.