Options
Shear capacity of prestressed concrete bridge girders with small shear reinforcement ratios
Publikationstyp
Journal Article
Date Issued
2020-11
Sprache
German
Author(s)
Journal
Volume
95
Issue
11
Start Page
397
End Page
407
Citation
Bauingenieur 95 (11): 397-407 (2020)
Publisher DOI
Scopus ID
Publisher
VDI Fachmedien
Increases in traffic loads and more restrictive design rules lead to higher demands on concrete bridges. Assessment of existing prestressed bridges revealed deficiencies in shear capacity. In a research project assigned by the German Federal Highway Research Institute (BASt), experimental and theoretical investigations were carried out aiming at proposing more refined design approaches for shear. In this paper, large-scale tests on continuous prestressed concrete beams conducted at the Institute for Structural Concrete of RWTH Aachen University are presented. The girders with rectangular or I-shaped cross-section featured small shear reinforcement ratios and distributed loads. Based on the findings, a refined shear design approach was developed. The modified truss model with additive concrete contribution allows considering additional shear capacity reserves compared to the current assessment guideline.
DDC Class
600: Technology
620.1: Engineering Mechanics and Materials Science
690: Building, Construction