受腐蚀钢筋混凝土墩柱抗侧向冲击的数值分析  

Numerical analysis of lateral anti-impact on the corroded reinforced concrete pier

作　　者：杨帅 夏晓舟[2] 方从启[3] YANG Shuai;XIA Xiao-zhou;FANG Cong-qi(CCCC Fourth Harbor Engineering Institute Co., Ltd, Guangzhou, Guangdong 510230, China;College of Mechanics and Materials, Hohai University, Nanjing, Jiangsu 210098, China;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]中交四航工程研究院有限公司,广东广州510230 [2]河海大学力学与材料学院,江苏南京210098 [3]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《中国港湾建设》2017年第12期25-29,共5页China Harbour Engineering

基　　金：国家自然科学基金项目(51178264)

摘　　要：采取在几何模型的混凝土保护层上预置顺筋的微裂纹和减小锈蚀区域钢筋截面直径的方式来简化受腐蚀的钢筋混凝土桥墩的有限元模型,使用LS-DYNA仿真分析了受腐蚀钢筋混凝土墩柱抗侧向冲击的全过程。从冲击过程中系统能量的转化、钢筋应变的时历值和混凝土墩柱的破坏形态等方面与试验结果进行了对比,验证了简化建模的可行性和仿真计算的正确性。为钢筋混凝土结构受碰撞的研究提供了计算依据,并为受碰撞的钢筋混凝土构件的残余承载力计算和耐久性评估提供参考。In order to simulate the corroded reinforced concrete pier,the micro-crack of the concrete cover along the longitudinal reinforcement and reduction diameter of the reinforcement section are pre-set in the geometry model.The lateral anti-impact properties of the reinforced concrete pier in ocean environment are analyzed by using the dynamic explicit finite element software LS-DYNA.The translation process of the system energy,the time history value of strain gauge and failure mode of the corroded reinforced concrete pier are compared with the experiment results.The feasibility of the simplified finite element modeling and the validity of the numerical simulation are validated.It can provide computation references to reinforced concrete structures under impacting,and also provide evidence for the residual bearing capacity and durability test of reinforced concrete members.

关 键 词：钢筋混凝土 桥墩 腐蚀 冲击 非线性动力学 

分 类 号：U656[交通运输工程—港口、海岸及近海工程]