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Title: 100-year performance of timber–concrete composite bridges in the United States

Source: Journal of Bridge Engineering. 25(3): 04020006.

Author(s)Wacker, James P.; Dias, Alfredo M. P. G.; Hosteng, Travis K.

Publication Year: 2020  View PDF »

Category: Journal Articles

Abstract: The use of timber–concrete composite (TCC) bridges in the United States dates back to approximately 1924 when the first bridge was constructed. Since then a large number of bridges have been built, of which more than 1,400 remain in service. The oldest bridges still in service are now more than 84 years old and predominately consist of two different TCC systems. The first system is a slab-type system that includes a longitudinal nail-laminated deck composite with a concrete deck top layer. The second system is a stringer system that includes either sawn timber or glulam stringers supporting a concrete deck top layer. The records indicate that most of the TCC highway bridges were constructed during the period of 1930–1960. The study presented in this paper discusses the experience and per-formance of these bridge systems in the US. The analysis is based on a review of the relevant literature and databases complemented with field inspections conducted within various research projects. Along with this review, a historical overview of the codes and guidelines available for the design of TCC bridges in the US is also included. The analysis undertaken showed that TCC bridges are an effective and durable design alternative for highway bridges once they have shown a high performance level, in some situations after more than 80 years in service with a low maintenance level.

Keywords: Timber; concrete; composite; bridge; superstructure; performance; inspection

Publication Review Process: Formally Refereed

File size: 5,120 kb(s)

Date posted: 06/03/2020

This publication is also viewable on Treesearch:  view
RITS Product ID: 97924
Current FPL Scientist associated with this product
Wacker, James P.
Research General Engineer

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