Shear capacity of 50 years old reinforced concrete bridge deck without shear reinforcement

Shear capacity of 50 years old reinforced concrete bridge deck without shear reinforcement

Yang, Y.
den Uijl, J.
Dieteren, G.
de Boer, A.

2010

A relatively low direct tensile strength is observed in cores drilled from old bridges in the Netherlands. To check whether this will influence the shear capacity of the bridges, beams sawn from a bridge deck built in 1961 were tested under shear loading in the Stevin laboratory at TU Delft. The flexural capacity of the beams was increased by means of carbon laminates glued to the bottom side. New beams with the same concrete compressive strength and reinforcement arrangement were casted and tested as reference. Six tests on old concrete beams and six tests on new concrete beams with a shear slenderness ratio between 2.2 to 4.1, and a cube compressive strength of about 80 MPa have been performed. In these tests no difference was found between the shear capacity of old and new beams with the same compressive strength, although the lower direct tensile strength of the old concrete compared to the new concrete.

CFRP
Large scale test
Old bridge

http://resolver.tudelft.nl/uuid:0b0f2afe-5b1b-4dd9-98bd-7d3dd2ca3cd3

749143

Precast Prestressed Concrete Institute PPCI

9780937040904

3rd International FIB Congress and Exhibition, Incorporating the PCI Annual Convention and Bridge Conference 2010, 29 May - 2 June 2010, Washington DC, USA

conference paper