Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Capacities and Resistance Factors for Driven Piling in Illinois
The Illinois Department of Transportation (IDOT) and the University of Illinois collected information on driven piling to improve predictions for pile capacity and to develop resistance factors appropriate for LRFD-based design. Several methods were investigated, including static methods, dynamic formula, WEAP, PDA, and CAPWAP. Pile dynamic testing was conducted on 37 piles from 19 different construction sites throughout Illinois. Measurements of penetration resistance were recorded for end of driving (EOD) and beginning of restrike (BOR) conditions. Estimates for static capacity were based on CAPWAP analyses of pile penetration at beginning of restrike (BOR) conditions. All piles were steel H-piles or closed-ended pile piles and driven with open-ended diesel hammers. Comparisons of measured and predicted capacity were made for several different predictive methods. The agreement between measured and predicted capacity for dynamic formulas, WEAP, and PDA are significantly better than observed in previous studies. The reason agreement improved is due primarily to the limited types of piles and hammers used for driving piles for common IDOT bridges. Improved reliability for predicting capacity can justify higher resistance factors and more efficient pile design.
Capacities and Resistance Factors for Driven Piling in Illinois
The Illinois Department of Transportation (IDOT) and the University of Illinois collected information on driven piling to improve predictions for pile capacity and to develop resistance factors appropriate for LRFD-based design. Several methods were investigated, including static methods, dynamic formula, WEAP, PDA, and CAPWAP. Pile dynamic testing was conducted on 37 piles from 19 different construction sites throughout Illinois. Measurements of penetration resistance were recorded for end of driving (EOD) and beginning of restrike (BOR) conditions. Estimates for static capacity were based on CAPWAP analyses of pile penetration at beginning of restrike (BOR) conditions. All piles were steel H-piles or closed-ended pile piles and driven with open-ended diesel hammers. Comparisons of measured and predicted capacity were made for several different predictive methods. The agreement between measured and predicted capacity for dynamic formulas, WEAP, and PDA are significantly better than observed in previous studies. The reason agreement improved is due primarily to the limited types of piles and hammers used for driving piles for common IDOT bridges. Improved reliability for predicting capacity can justify higher resistance factors and more efficient pile design.
Capacities and Resistance Factors for Driven Piling in Illinois
Long, James H. (Autor:in) / Anderson, Andrew (Autor:in) / Kramer, William (Autor:in)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
24.02.2014
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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