Flexural Design of High Strength Concrete Prestressed Bridge Girders Review of Current Practice and Parametric Study;Research rept. Jan 00-May 03

摘要

This is the third of four reports that document the findings of a Texas Department of Transportation sponsored project to evaluate the allowable stresses and resistance factors for high strength, concrete (HSC) prestressed bridge girders. The second phase of this research study, which is documented in this volume, focused on three major objectives: (1) to determine the current state of practice for the design of HSC prestressed girders, (2) to evaluate the controlling limit states for the design of HSC prestressed bridge girders and identify areas where some economy in design may be gained, and (3) to conduct a preliminary assessment of the impact of raising critical flexural design criteria with an objective of increasing the economy and potential span length of HSC prestressed girders. The first objective was accomplished through a literature search and survey. The second objective was accomplished by conducting a parametric study for single-span HSC prestressed bridge girders to primarily investigate the controlling flexural limit states for both the AASHTO Standard and LRFD Specifications.