DEFORMATION DECOMPOSITION FOR BEAM WITH INITIAL ECCENTRIC PRESTRESS
The statically equilibrated deformation modes for an Euler-Bemoulli beam element with eccentric initial prestress are defined, as well as with the corresponding macro-stiffness. It is found that the decomposed deformation modes for a beam element with initial prestress are distinctively different from those of the beam element with no prestress. The global deformation of structure under given loads can be decomposed as the weighted combination of the elemental strain deformation modes and the specified rigid body modes. In this way, the deformation characteristic of the prestressed beam under load could be further refined, which is helpful to further analyse the structural response under given loads. A simply supported bridge model with built-up Tee-beams is presented for illustration.
FEM Stiffness matrix Decompose Deformation
Jian-Min Wang Siu-Seang Law
Faculty of Architectural Civil Engineering and Environment, Ningbo University, Ningbo 315211, P.R. Civil and Structural Engineering Department, Hong Kong Polytechnic University, Hunghom,Kowloon, Hon
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
286-291
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）