United States Department of Transportation
i
Develop Strong and Serviceable Details for Precast, Prestressed Concrete Bent Cap Standards That Can Be Implemented on Everyday Bridge Construction Projects, Project Summary
-
2018-01-01
-
[PDF-467.04 KB]
Details:
-
Alternative Title:0-6863 : Develop Strong and Serviceable Details for Precast, Prestressed Concrete Bent Cap Standards That Can BeImplemented on Everyday Bridge Construction Projects, Project Summary
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Corporate Publisher:
-
Abstract:Pretensioned bent caps are an attractive substructure component because they offer contractors an option for fabrication by prestressing plants and can be used to eliminate or reduce cracks. Two sets of design recommendations were developed to enable implementation of pretensioned caps. The first allows for conversion of RC designs to pretensioned designs. For a new design, flexure design is based on the concept of zero tension under dead load to ensure cracks close upon removal of live load. Shear design recommendations include a modification of AASHTO sectional design methods to ensure that crack angles are physically admissible. Design examples are provided for conversion of RC to pretensioned caps, new design of standard substructures, use of voids to reduce weight, and detailing of end regions. A final example demonstrates how engineers can leverage the benefits of the pretensioned caps to reduce the number of column lines in a substructure, providing the potential for substantial savings in construction costs.
-
Format:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
