Investigation of Cross Timber Bridge Decks as a Sustainable Solution for Repair of Deficient Rural Wood Bridges

Kode, Anirudh; van de Lindt, John W.; Amini, M Omar; Colorado State University, Fort Collins; Mountain-Plains Consortium; North Dakota State University

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Investigation of Cross Timber Bridge Decks as a Sustainable Solution for Repair of Deficient Rural Wood Bridges

2021-05-01
By Kode, Anirudh ; van de Lindt, John W. ; Amini, M Omar

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English

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Creators:

Kode, Anirudh ; van de Lindt, John W. ; Amini, M Omar

Kode, Anirudh ; van de Lindt, John W. ; Amini, M Omar Less -
Corporate Creators:

Colorado State University, Fort Collins ; Mountain-Plains Consortium ; North Dakota State University

Colorado State University, Fort Collins ; Mountain-Plains Consortium ; North Dakota State University Less -
Corporate Contributors:

United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology

United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology Less -
Subject/TRT Terms:

[+]

Bridge Decks Design Diaphragms (Engineering) Earthquake Resistant Design Highways Laminated Wood Load Tests Materials
Publication/ Report Number:

MPC 21-437
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

Mountain-Plains Consortium ; North Dakota State University

Mountain-Plains Consortium ; North Dakota State University Less -
Abstract:

Cross Laminated Timber (CLT) has only recently garnered attention as a new construction material in the United States. Despite being introduced in Europe nearly 20 years ago, CLT is still not used widely in North America. One primarily reason is because CLT is not yet recognized as a structural system for seismically active regions of the country. One sub-assembly that has not been fully investigated are horizontal diaphragms for floors, roofs, or bridge decks. This report aims to test a single large-scale CLT cantilever diaphragm subjected to a simulated seismic load. Data were collected and the behavior of the diaphragm documented to help begin to reduce this dearth of CLT data in the United States. These data will also assist in refining CLT diaphragm design procedures that have recently been developed. Ten CLT panels were used to build the diaphragm, which was set up as a cantilever beam according to ASTM specifications. A 110-kip actuator was used to apply a concentrated load at one end of the diaphragm while a steel base serving as a fixed boundary condition was at the other end. The Consortium of Universities for Research in Earthquake Engineering (CUREE) test protocol with a reference displacement of 75.6 mm (3 inches) was applied to the floor diaphragm specimen, which included a number of string potentiometers to collect displacement data. The diaphragm behaved in a predictable manner and the connectors initially failed in tension first even with a chord designed per the National Design Specification for wood. Then the CLT panels separated, resulting in a total failure. This dataset will be made available to those working on CLT diaphragm provisions for refinement of ongoing revisions.
Format:

PDF
Funding:

MPC-487
Collection(s):

University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:af60a7f722555be38df7fcfba9a2936c25a7971579b229c1bad5e9060fee4c62
Download URL:

https://rosap.ntl.bts.gov/view/dot/60537/dot_60537_DS1.pdf
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Investigation of Cross Timber Bridge Decks as a Sustainable Solution for Repair of Deficient Rural Wood Bridges

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