Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Live-Load Analysis of Posttensioned Box-Girder Bridges
This paper presents an evaluation of flexural live-load distribution factors for cast-in-place box-girder bridges. The response of a typical box-girder bridge was recorded during a static live-load test. This test involved driving two heavily loaded trucks across the instrumented bridge on selected load paths. The instruments used to record the response of the bridge were strain gauges, displacement transducers, and tilt sensors. The measured data were then used to calibrate a finite-element modeling scheme using solid elements. From this finite-element model, the theoretical live-load distribution factors and load ratings for the test bridge were determined and compared with the factors and ratings predicted in the AASHTO LRFD specifications. A parametric study of cast-in-place, box-girder bridges using the calibrated finite-element modeling scheme was then used to investigate how various parameters such as span length, girder spacing, parapets, skew, and deck thickness affect the flexural live-load distribution factors. Based on the results of the parametric study, a new equation, which more accurately predicts the exterior girder distribution factor, is proposed.
Live-Load Analysis of Posttensioned Box-Girder Bridges
This paper presents an evaluation of flexural live-load distribution factors for cast-in-place box-girder bridges. The response of a typical box-girder bridge was recorded during a static live-load test. This test involved driving two heavily loaded trucks across the instrumented bridge on selected load paths. The instruments used to record the response of the bridge were strain gauges, displacement transducers, and tilt sensors. The measured data were then used to calibrate a finite-element modeling scheme using solid elements. From this finite-element model, the theoretical live-load distribution factors and load ratings for the test bridge were determined and compared with the factors and ratings predicted in the AASHTO LRFD specifications. A parametric study of cast-in-place, box-girder bridges using the calibrated finite-element modeling scheme was then used to investigate how various parameters such as span length, girder spacing, parapets, skew, and deck thickness affect the flexural live-load distribution factors. Based on the results of the parametric study, a new equation, which more accurately predicts the exterior girder distribution factor, is proposed.
Live-Load Analysis of Posttensioned Box-Girder Bridges
Hodson, Dereck J. (Autor:in) / Barr, Paul J. (Autor:in) / Halling, Marvin W. (Autor:in)
Journal of Bridge Engineering ; 17 ; 644-651
27.08.2011
82012-01-01 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Live-Load Analysis of Posttensioned Box-Girder Bridges
| British Library Online Contents | 2012
Live-Load Test Comparison and Load Ratings of a Posttensioned Box Girder Bridge
| British Library Online Contents | 2013
Live-Load Test Comparison and Load Ratings of a Posttensioned Box Girder Bridge
| Online Contents | 2013