A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Effect of Midspan Diaphragms on Load Distribution in a Prestressed Concrete Box-Beam Bridge. Philadelphia Bridge
The report describes the field testing of an existing beam-slab bridge constructed with prestressed concrete spread box girders. The main purpose of the study was to experimentally investigate the effect of midspan diaphragms on distribution of vehicular loads to each of the longitudinal beams. The bridge was tested first with the diaphragm in place, and then again after the diaphragms had been removed. It was found that the midspan diaphragms did transmit load laterally. The distribution coefficients and deflections for girders directly under the vehicular loads were slightly reduced by the use of the diaphragms, when the bridge was loaded with one truck. However, owing to the compensating effects when several lanes were loaded simultaneously, the distribution factors were not appreciably affected by the use of the diaphragms. It was also found that the experimentally determined distribution factors for interior girders were considerably less than the PDH design values, while for exterior girders, the experimental values were greater than the design values. The effect of girder spacing was studied by comparing the test results with those from the study of another bridge of similar construction (Drehersville Bridge - 1965). In addition, an evaluation of the applicability of the Guyon-Massonnet load distribution theory was investigated by comparing the results with the values predicted by the theory. (Author)
The Effect of Midspan Diaphragms on Load Distribution in a Prestressed Concrete Box-Beam Bridge. Philadelphia Bridge
The report describes the field testing of an existing beam-slab bridge constructed with prestressed concrete spread box girders. The main purpose of the study was to experimentally investigate the effect of midspan diaphragms on distribution of vehicular loads to each of the longitudinal beams. The bridge was tested first with the diaphragm in place, and then again after the diaphragms had been removed. It was found that the midspan diaphragms did transmit load laterally. The distribution coefficients and deflections for girders directly under the vehicular loads were slightly reduced by the use of the diaphragms, when the bridge was loaded with one truck. However, owing to the compensating effects when several lanes were loaded simultaneously, the distribution factors were not appreciably affected by the use of the diaphragms. It was also found that the experimentally determined distribution factors for interior girders were considerably less than the PDH design values, while for exterior girders, the experimental values were greater than the design values. The effect of girder spacing was studied by comparing the test results with those from the study of another bridge of similar construction (Drehersville Bridge - 1965). In addition, an evaluation of the applicability of the Guyon-Massonnet load distribution theory was investigated by comparing the results with the values predicted by the theory. (Author)
The Effect of Midspan Diaphragms on Load Distribution in a Prestressed Concrete Box-Beam Bridge. Philadelphia Bridge
C. S. Lin (author) / D. A. VanHorn (author)
1968
105 pages
Report
No indication
English
Civil Engineering , Bridges , Design , Loading(Mechanics) , Diaphragms(Mechanics) , Concrete , Beams(Structural) , Structural parts , Test methods , Test equipment , Data , Analysis , Moments , Strain(Mechanics) , Deflection , Oscillographs , Traffic , Roads , Vehicles , Concrete box girder bridges , Guyon-Massonet load distribution theory , Dimensions
| Engineering Index Backfile | 1968
Prestressed concrete bridge is built with box beams without diaphragms
Engineering Index Backfile | 1966
Effect of Diaphragms on Load Distribution of Prestressed Concrete Bridges
| British Library Conference Proceedings | 2002
Effect of Diaphragms on Load Distribution of Prestressed Concrete Bridges
| British Library Online Contents | 2002
Load distribution on prestressed concrete slab bridge
| Engineering Index Backfile | 1960