|
| Finite element analysis on transversal frame-effect of prestressed concrete box-girder bridge |
| Received:March 21, 2012 Revised:June 19, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201304016 |
| KeyWord:concrete box-girder transverse framing finite element |
| Author | Institution |
| 钟新谷 |
湖南科技大学 土木工程学院,湘潭 |
| 舒小娟 |
湖南科技大学 土木工程学院,湘潭 |
| 张昊宇 |
湖南科技大学 土木工程学院,湘潭 |
|
| Hits: 2635 |
| Download times: 1682 |
| Abstract: |
| The problem of longitudinal cracking for the top slab of prestressed concrete box-girder bridge is studied by finite element method.Taking the rotational displacement at the corner of top slab and web as the basic unknown quantity,and based on the longitudinal one-dimension element of box-girder,the element stiffness matrix and corresponding equivalent nodal forces for the analysis of transversal frame-effect of box-girder were developed on the basis of minimum potential energy principle.The comparative calculation indicates that the results of the finite element method are in good accordance with those of theoretical analysis.Analysis of an practical bridge indicates that a relatively conservative result at the corner can be obtained by the method proposed in Chinese current bridge design code,while for that at the middle of the top slab,the result is relatively unsafe.Hence the top slab might crack longitudinally with the inadequacy consideration of the transversal frame-effect.The method proposed in this paper is conceptually simple and calculates fast,which can make up the inadequacy of current business software.Hence it is valuable for reference and extension in engineering design. |