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Experimental research on prestressed concrete composite box girders with corrugated steel webs(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2009年05期
Page:
64-70
Research Field:
Publishing date:
2009-10-20

Info

Title:
Experimental research on prestressed concrete composite box girders with corrugated steel webs
Author(s):
DI Jin1;  ZHOU Xuhong1; 2; 3;  KONG Xiangfu1; 4;  CHENG Delin1;  ZHANG Qian1
1. School of Highway, Changan University, Xian 710064, Shaanxi, China; 2. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, Gansu, China; 3. School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 4. Shandong Province Institute of Communications Plan and Design, Jinan 250031, Shandong, China
Keywords:
bridge engineering;  corrugated steel web;  box girder;  ultimate bearing capacity;  experiment
PACS:
U448.38
DOI:
-
Abstract:
The development and application of prestressed concrete composite box girders with corrugated steel webs were presented. A model (1∶4) of the prestressed concrete composite box girder with corrugated steel webs was made in order to research the mechanics properties of the composite box girders. Through the static loading test, the experimental research on bending, shear and torsion of the prestressed concrete composite box girder with corrugated steel webs was performed. The deformation of the box girder, the strain of top and bottom concrete slabs, the corrugated steel webs and the diaphragms, reactive force, crack load and failure load were obtained under the multistage loading. The results show that compared with the common prestressed concrete box girders, the prestressed concrete composite box girders with corrugated steel webs have particular mechanical properties. Under loading, bending moment is only borne by top and bottom concrete slabs, and most shear force is borne by the corrugated steel webs. Negative shear lag occurs on the top concrete slabs of midspan under symmetric loadings. Within elastic range, longitudinal strains on top and bottom concrete slabs distribute linearly which accord with dummy horizontal section assumption. The bending course of box girder has three stages, which include of elastic stage, crack stage and failure behavior stage. Torsional stiffness of box girder was availably improved by diaphragms. 20 figs, 11 refs.

References:

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Last Update: 2009-10-20