TY - JOUR

T1 - UHPFRC-Fertigteilsegmente für einen nachhaltigen und ressourcenschonenden Betonbrückenbau

AU - Wilkening, Marvin

AU - Schack, Tobias

AU - Haist, Michael

AU - Oettel, Vincent

PY - 2023/11/6

Y1 - 2023/11/6

N2 - UHPFRC Precast Segments for Sustainable and Resource-Efficient Concrete Bridge Construction. Many of the concrete bridges currently in use in Germany are in a deficient condition due to their age or design. However, increased traffic loads also highly contribute to the fact that many of the existing bridges will have to be replaced in the medium term. Due to the many advantages of concrete structures, it can be assumed that concrete bridges will continue to be designed and built in the future. In the light of the increasing consequences of climate change and the pressing need to reduce CO2 emissions also in the building industry as well, there is an urgent need for research into climate- and resource-friendly as well as sustainable but also economical concrete construction methods. A promising approach to fast, effective and resource-optimized as well as CO2-efficient construction is the use of high-performance materials such as UHPFRC in combination with precast segmental construction. In this paper, starting from a monolithic box girder bridge made of normal strength concrete, numerical calculations are used to investigate how much material can be saved in segmented box girder bridges by varying the concrete compressive strength (normal and high-strength concrete as well as UHPFRC). The life cycle assessment subsequently carried out on this basis for life cycle phases A1 to A3 showed that, when the material is fully utilized, the use of UHPFRC leads to very resource-efficient and sustainable structures compared with normal- and high-strength concretes.

AB - UHPFRC Precast Segments for Sustainable and Resource-Efficient Concrete Bridge Construction. Many of the concrete bridges currently in use in Germany are in a deficient condition due to their age or design. However, increased traffic loads also highly contribute to the fact that many of the existing bridges will have to be replaced in the medium term. Due to the many advantages of concrete structures, it can be assumed that concrete bridges will continue to be designed and built in the future. In the light of the increasing consequences of climate change and the pressing need to reduce CO2 emissions also in the building industry as well, there is an urgent need for research into climate- and resource-friendly as well as sustainable but also economical concrete construction methods. A promising approach to fast, effective and resource-optimized as well as CO2-efficient construction is the use of high-performance materials such as UHPFRC in combination with precast segmental construction. In this paper, starting from a monolithic box girder bridge made of normal strength concrete, numerical calculations are used to investigate how much material can be saved in segmented box girder bridges by varying the concrete compressive strength (normal and high-strength concrete as well as UHPFRC). The life cycle assessment subsequently carried out on this basis for life cycle phases A1 to A3 showed that, when the material is fully utilized, the use of UHPFRC leads to very resource-efficient and sustainable structures compared with normal- and high-strength concretes.

KW - climate limit state

KW - cross-section optimization

KW - life-cycle-assessment

KW - numerical investigations

KW - resource conservation

KW - segment construction

KW - sustainability

KW - ultra-high-performance fiber-reinforced concrete

UR - http://www.scopus.com/inward/record.url?scp=85174618135&partnerID=8YFLogxK

U2 - 10.1002/best.202300054

DO - 10.1002/best.202300054

M3 - Artikel

AN - SCOPUS:85174618135

VL - 118

SP - 788

EP - 802

JO - Beton- und Stahlbetonbau

JF - Beton- und Stahlbetonbau

SN - 0005-9900

IS - 11

ER -