A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of Live Load Distribution Factors of a Highway Bridge
The design of bridges depends on the transverse distribution characteristics of the live load that is carried. The study goal is to evaluate experimentally and numerically the Live Load Distribution Factors (LLDFs) proposed by the American Association of State Highway and Transportation Officials (AASHTO) specifications for a case of highway bridge with a composite steel–concrete structural system. Different trucks have been used to attain the static tests and achieve maximum values for the design live loads and deflections for the composite steel–concrete bridge girders. Furthermore, a linear finite element analysis has been executed for the composite bridge to outspread the LLDFs assessment and to study the influence of the Cross-Frame Diaphragm (CFD) on the LLDFs. The moment LLDFs quantities have been calculated according to AASHTO specifications, they have been found more conservative while shear quantities have been found critical, especially in exterior girders. Also, the contribution of CFD in the spread of the live load among the girders has been verified by the redistribution of the LLDFs between the internal and exterior girders.
Evaluation of Live Load Distribution Factors of a Highway Bridge
The design of bridges depends on the transverse distribution characteristics of the live load that is carried. The study goal is to evaluate experimentally and numerically the Live Load Distribution Factors (LLDFs) proposed by the American Association of State Highway and Transportation Officials (AASHTO) specifications for a case of highway bridge with a composite steel–concrete structural system. Different trucks have been used to attain the static tests and achieve maximum values for the design live loads and deflections for the composite steel–concrete bridge girders. Furthermore, a linear finite element analysis has been executed for the composite bridge to outspread the LLDFs assessment and to study the influence of the Cross-Frame Diaphragm (CFD) on the LLDFs. The moment LLDFs quantities have been calculated according to AASHTO specifications, they have been found more conservative while shear quantities have been found critical, especially in exterior girders. Also, the contribution of CFD in the spread of the live load among the girders has been verified by the redistribution of the LLDFs between the internal and exterior girders.
Evaluation of Live Load Distribution Factors of a Highway Bridge
Karkush, Mahdi O. (editor) / Choudhury, Deepankar (editor) / Allawi, Abbas A. (author) / Said, Abdulmuttalib I. (author) / Al-Sherrawi, Mohannad H. (author) / Albayati, Amjad (author) / Al Gharawi, Mohanned (author) / El-Zohairy, Ayman (author)
Geotechnical Engineering and Sustainable Construction ; Chapter: 43 ; 531-543
2022-03-20
13 pages
Article/Chapter (Book)
Electronic Resource
English
Evaluation of Live Load Distribution Factors of a Highway Bridge
| TIBKAT | 2022
Bridge Girder Distribution Factors for Live Load
| British Library Conference Proceedings | 1999
Canadian highway bridge evaluation: load and resistance factors
| British Library Online Contents | 1992
Live load factors for reliability-based bridge evaluation
| Springer Verlag | 2013
Live load factors for reliability-based bridge evaluation
| Online Contents | 2013