Use of fiber reinforced polymer composite cable for post-tensioning application.

Mirmiran, Amir; Yang, Xiong; Zohrevand, Pedram; Suksawang, Nakin; Arockiasamy, Madasamy; Florida International University. Dept. of Civil and Environmental Engineering; Florida Institute of Technology. Civil Engineering Dept.; Florida Atlantic University. Dept. of Civil, Environmental and Geomatics Engineering

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Use of fiber reinforced polymer composite cable for post-tensioning application.

2015-08-01
By Mirmiran, Amir ; Yang, Xiong ; Zohrevand, Pedram ; ...

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Creators:

Mirmiran, Amir ; Yang, Xiong ; Zohrevand, Pedram ; Suksawang, Nakin ; Arockiasamy, Madasamy

Mirmiran, Amir ; Yang, Xiong ; Zohrevand, Pedram ; Suksawang, Nakin ; Arockiasamy, Madasamy Less -
Corporate Creators:

Florida International University. Dept. of Civil and Environmental Engineering ; Florida Institute of Technology. Civil Engineering Dept. ; Florida Atlantic University. Dept. of Civil, Environmental and Geomatics Engineering

Florida International University. Dept. of Civil and Environmental Engineering ; Florida Institute of Technology. Civil Engineering Dept. ; Florida Atlantic University. Dept. of Civil, Environmental and Geomatics Engineering Less -
Subject/TRT Terms:

[+]

Alternatives Analysis Box Girder Bridges Bridge Piers Cables Carbon Fibers Creep Tests Feasibility Analysis Fiber Reinforced Polymers Posttensioning Prestressed Concrete Bridges Steel Wire
Publication/ Report Number:

BDK80-977-35 ; BDV29-977-10

BDK80-977-35 ; BDV29-977-10 Less -
Resource Type:

Tech Report
Geographical Coverage:

Florida
Corporate Publisher:

Florida. Dept. of Transportation
Abstract:

The primary objective of this research project was to assess the feasibility of the use of innovative carbon fiber reinforced

polymer (CFRP) tendons and to develop guidelines for CFRP in post-tensioned bridge applications, including segmental

bridges and pier caps. The main motivation for the use of advanced composites is that they are not susceptible to corrosion,

unlike prestressing steel.

An experimental investigation and a numerical simulation were conducted to compare the performance of a scaled model

of the Long Key segmental box girder bridge, post-tensioned with two types of carbon fiber strands and steel strands. The

model was tested at different prestress levels and at different loading configurations. The most important distinction between

the two types of carbon fiber strands is the elastic modulus, which are respectively 77% and 93% of that of steel strands.

While the study confirms feasibility of both types of carbon fiber strands for segmental bridge applications, and their similar

serviceability behavior, strands with higher elastic modulus could improve structural performance and minimize

displacements beyond service loads.

As the second component of the project, a side-by-side comparison of two types of carbon fiber strands against steel

strands was conducted in a scaled model of a typical interior hammerhead with two identical cantilever overhangs. Two

different strand arrangements were used for post-tensioning, with eight and six strands, respectively representing an over-design and a slight under-design relative to the factored demand. The model was tested under service and factored flexure

and shear loads. The investigation confirmed the feasibility of using carbon fiber strands in unbonded post-tensioning of pier

caps. Considering both serviceability and overload conditions, the general performance of the pier cap model under both

flexure and shear loading was deemed acceptable using either type of carbon fiber strands and quite comparable to that of

steel strands.

In another component of this research, creep stress tests were conducted with carbon fiber composite cable (CFCC). The

anchorages for all the specimens were prepared using a commercially available expansive grout. Specimens withstood 95%

of the guaranteed capacity provided by the manufacturer for a period of five months, without any sign of rupture.
Format:

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Collection(s):

US Transportation Collection
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urn:sha256:1866ceab68e887c03b1aa38be6fc60ce652c929149bdba8976951fbd358a3dbb
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https://rosap.ntl.bts.gov/view/dot/29192/dot_29192_DS1.pdf
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Use of fiber reinforced polymer composite cable for post-tensioning application.

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