A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Live Load Distribution Factors for Washington State SR SR 18/SR 516 Overcrossing
This report presents an evaluation of live-load distribution factors for a series of three-span, prestressed concrete girder bridges. The response of one bridge, measured during a static live-load test, was used to evaluate the reliability of a finite-element model. Twenty-four variations of this model were then used to evaluate the procedures for computing live-load distribution factors that are embodied in three bridge design codes. The finite-element models were also used to investigate the effects that lifts, intermediate diaphragms, end diaphragms, continuity, skew angle and load type have on distribution factors. For geometrics similar to those considered in the development of the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Specifications (1994), the distribution factors computed with the finite-element models were within 6 percent of the code values. However, for the geometry of the bridge that was tested, the discrepancy was 28 percent. Lifts, end diaphragms, skew angle and load type significantly decreased the distribution factors, while continuity and intermediate diaphragms had the least effect.
Live Load Distribution Factors for Washington State SR SR 18/SR 516 Overcrossing
This report presents an evaluation of live-load distribution factors for a series of three-span, prestressed concrete girder bridges. The response of one bridge, measured during a static live-load test, was used to evaluate the reliability of a finite-element model. Twenty-four variations of this model were then used to evaluate the procedures for computing live-load distribution factors that are embodied in three bridge design codes. The finite-element models were also used to investigate the effects that lifts, intermediate diaphragms, end diaphragms, continuity, skew angle and load type have on distribution factors. For geometrics similar to those considered in the development of the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Specifications (1994), the distribution factors computed with the finite-element models were within 6 percent of the code values. However, for the geometry of the bridge that was tested, the discrepancy was 28 percent. Lifts, end diaphragms, skew angle and load type significantly decreased the distribution factors, while continuity and intermediate diaphragms had the least effect.
Live Load Distribution Factors for Washington State SR SR 18/SR 516 Overcrossing
P. Barr (author) / J. Stanton (author) / M. Eberhard (author)
2000
98 pages
Report
No indication
English
Prestressed highway overcrossing
Engineering Index Backfile | 1953
| NTIS | 1973
Street overcrossing without stopping traffic
| Engineering Index Backfile | 1964