桥梁结构地震反应邻梁碰撞分析等效刚体模型

详细信息

EQUIVALENT RIGID-BODY COMPACT MODEL OF POUNDING BETWEEN ADJACENT BRIDGE GIRDERS DURING EARTHQUAKES

State Key Laboratory of Coastal and Offshore Engineering, Dlian University of Technology, Dalian 116024, China;2. Ocean University of China, Qingdao, 266071, China

摘要: 在基于直杆共轴碰撞理论建立的桥梁地震反应邻梁碰撞分析模型基础上,结合动量守恒定律和能量守恒定律,给出了与之等效的刚体碰撞模型,所定义的等效恢复系数r由l₂/l₁邻梁长度比和碰撞弹簧刚度比唯一决定.一座实际桥梁地震反应邻梁碰撞效应分析表明,等效刚体碰撞模型可以得到与弹性杆碰撞模型几乎一致的结果.
- 桥梁 /
- 地震反应 /
- 碰撞 /
- 分析模型 /
- 恢复系数
Abstract: Conservation laws of momentum and energy are introduced to model pounding between adjacent bridge girders based on collinear compact between rod theory. An equivalent rigid-body compact model is proposed. The coefficient of restitution depends only on the length ratio l₂/l₁ and impact spring stiffness ratio α. A simplified analysis of seismic pounding in a concrete bridge indicates that the equivalent rigid-body compact model can acquire almost the same structural response as that elastic rod compact model does.
- bridge /
- seismic response /
- pounding /
- analysis model /
- coefficient of restitution