United States Department of Transportation
i
Seismic Performance of Columns with Grouted Couplers in Idaho Accelerated Bridge Construction Applications
-
2016-10-16
-
[PDF-7.22 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:n Accelerated Bridge Construction (ABC) methods, one way to connect prefabricated columns is by using grouted steel bar couplers. As of October 2016, in the U.S., only Utah DOT allows the use of grouted couplers in plastic hinge locations in seismic zones. The main focus of this research project is on seismic performance of grouted coupler column-to-footing and column-to-bent cap connections under Idaho seismic conditions. The performance of grouted coupler connections is compared to the conventional cast-in-place connections. Three Idaho bridges were selected for computer analysis. They were placed in the most seismically active location in Idaho. All three bridge columns performed well. The stresses in both the longitudinal reinforcing bars and the grouted coupler regions are well within acceptable range. The largest column drift, using combination of orthogonal displacements, is 1.6 percent. The single column analysis under large drift shows that grouted couplers may be used to connect precast columns to footings or cap beams for columns with less than 4 percent drift. The low-cycle fatigue analysis indicates that at higher strains the use of ASTM A706 steel will significantly improve the fatigue life of the reinforcing bars.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
