Two LA yer high performance concrete beams for bridges

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Two layer high performance RC bear can be used in the traffic direction of long-span bridges. The beam's section consists of two parts. The bottom part is made of normal strength concrete (NSC). The upper one is made of steel fibered high strength concrete (HSC). Using two layer beams is logical, because as the beam span becomes langer and as the service load increases, higher concrete strength is required in the beam's compressed zone to withstand rather big bending moments. As concrete in the tensile zone of the section contributes little to the beams' bearing capacity, this zone is made of NSC. It is an important economical advantage of two layer bears. Steel fibers are used just in the compressed zone made of HSC. Steel fibers yields higher ductility of the HSC layer, allowing proper design of two layer bridge beams to dynamic loads. For such beams the design parameters include the HSC class, whereas the HSC layer depth is known and equals to the height of the upper part. The bottom NSC part of long span beams is usually pre-stressed.

Original languageEnglish
Title of host publicationfib Symposium TEL-AVIV 2013
Subtitle of host publicationEngineering a Concrete Future: Technology, Modeling and Construction, Proceedings
EditorsAvraham N. Dancygier
Number of pages4
ISBN (Electronic)9789659203901
StatePublished - 2013
Eventfib Symposium TEL-AVIV 2013 - Tel-Aviv, Israel
Duration: 22 Apr 201324 Apr 2013

Publication series

Namefib Symposium TEL-AVIV 2013: Engineering a Concrete Future: Technology, Modeling and Construction, Proceedings


Conferencefib Symposium TEL-AVIV 2013


  • Bridge bears
  • Design
  • Fibered concrete
  • High performance concrete element
  • High strength concrete


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