Nonlinear coupling analysis considering dynamic and static friction effect for large travel sliding bearing(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2017年02期
- Page:
- 45-54
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Nonlinear coupling analysis considering dynamic and static friction effect for large travel sliding bearing
- Author(s):
- YAN Dong-huang; DONG Dao-fu; CHEN Chang-song; TU Guang-ya; YUAN Ming; LI Yan
- 1. Hunan Province University Key Laboratory of Bridge Engineering, Changsha University of Science & Technology, Changsha 410114, Hunan, China; 2. School of Civil Engineering and Architecture, Changsha University of Science & Technology, Changsha 410114, Hunan, China
- Keywords:
- bridge engineering; geometric nonlinearity; boundary nonlinearity; CR-TL beam-column theory; large travel sliding bearing; friction effect; dynamic rigid arm
- PACS:
- U441.4
- DOI:
- -
- Abstract:
- In order to solve the analysis problem of coupling effect between boundary nonlinearity and geometrical nonlinearity on bearing component of long-span structure where an especially big relative slipping occurs in contact surface, a nonlinear solution in the whole process of mechanical characteristics considering the dynamic and static friction effect in large travel sliding bearing was created based on the finite element analysis theory of plane skeletal structures. The total deformation beam-column theory based on total Lagrange formulation under co-rotating coordinate system (CR-TL) about coupling effect between axial force and bending moment was perfected firstly to make it suitable for rapid geometrically nonlinear analysis on large displacement of general structure. A double element nonlinear calculation model of sliding bearing was built and the criterion condition of sliding-stopping which was suitable for dynamic and static friction coefficient was optimized. The dynamic element method, dynamic rigid arm method, and the modified main and subordinate node method were all used to solve the bearing sideling phenomenon in large travel sliding bearing. A beam-column theory calculation model in the whole process of mechanical characteristics was built, and variable stiffness method for solving the nonlinear equation was put forward. A collaborative work pattern based on internal discount coefficient method which adapted to the multiple bearing element system was applied to calculation. The results show that under the same precision level, the calculation efficiency can be improved by 30% when using CR-TL total deformation beam-column theory to analyze the whole construction process of large span cable-stayed bridge. When using different bearing simulation modes, the result difference between single and double bearing rigid frame under the conditions of absolute slippery and frictional slippery can reach 44% to 55%. Under vehicle load, differences of longitudinal displacement of girder and deviation of pylon can reach to 10 cm level, which significantly changes the response characteristics of structures. The theory can be applied to precise analysis for the same kind of engineering problems.
Last Update: 2017-04-07