Shear Lag Effect of Wide Single Box Bridge with Multi-cell in Construction
[1]Zhang Junfeng,Chen He,Yang Shounan,et al.Shear Lag Effect of Wide Single Box Bridge with Multi-cell in Construction[J].Journal of Zhengzhou University (Engineering Science),2021,42(03):105-.[doi:10.13705/j.issn.1671-6833.2021.03.018]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42卷
Number of periods:
2021 03
Page number:
105-
Column:
Public date:
2021-05-10
- Title:
- Shear Lag Effect of Wide Single Box Bridge with Multi-cell in Construction
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2021.03.018
- Abstract:
- Studies were initiated for the shear lag effect of the wide single box bridge with multi-cell during cantilever construction and its evolution in the construction. A single-box with five cells four-span continuous PC bridge was taken as an example, and the whole construction process was simulated numerically. Analyses were focused on the normal stresses in the roof and bottom plate of several critical sections, caused by concrete pouring, prestressing, closure and system transformation singly. The results showed that the transverse distributions of normal stresses could be regarded as the superposition of “global” shear lag effect of the whole section and “local” shear lag effect of each web, and the former origins from the shear stress difference in webs. Moreover, the proportions of the two effects were related to the cell number, cantilever length and load type. The global effect increased with the cell number. The shear lag effect caused by the concrete pouring and prestressing in the root section was remarkable in the roof but not the bottom plate, and the global effect increased with the cantilever length. Additionally, the global effect caused by the concrete pouring was more evident than that caused by prestressing.
- References:
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Last Update:
2021-06-24