Design Criteria for Overhanging Ends of Bent Caps

Ferguson, Phil M

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Design Criteria for Overhanging Ends of Bent Caps

1964-08-01
By Ferguson, Phil M

File Language:

English

Details

Creators:

Ferguson, Phil M
Corporate Creators:

University of Texas at Austin. Center for Highway Research
Corporate Contributors:

Texas. Highway Department ; United States. Department of Commerce. Bureau of Public Roads
Subject/TRT Terms:

Anchorages Bents Bonds Cantilevers Design Shear Strength Steel Stirrups Stresses Ultimate Strength Webbing
Publication/ Report Number:

TxDOT Research Project 0-52 ; THD Study 3-5-63-52
Resource Type:

Tech Report
Geographical Coverage:

United States
Corporate Publisher:

University of Texas at Austin. Center for Highway Research
Abstract:

A program of 36 bent cap sections of 36-in. Depth was tested in an investigation primarily directed toward the bond and shear strengths which should be used in design. Intermediate, a 432, and a 431 grade steels were used. Even though the final failures were often classified as bond or shear, only 8 percent of the specimens failed at less than calculated fy steel stress. The average fs developed was between 1. 15fy and 1. 20fy. In shear it was found that an ultimate v much higher than allowed by current specifications was feasible for loads placed between 0.5d and 1.2d from the support. Vertical stirrups added no perceptible strength, but horizontal web steel was effective. In bond it was found that the nominal bond stress in the length between load and support was not important, but that an end anchorage distance beyond the load was essential. With an end anchorage of 15 in. For no. 11 bars or 12. In. For no. 8 bars, there seemed to be no problem in developing a 75-ksi steel. The width of web cracks was only slightly less than that of flexural cracks on the tension face and suggested the desirability of using horizontal stirrups in these cantilever ends.
Format:

PDF
Funding:

4413-766, 4418-831
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:e5de6ce718a88a988508a61893d1ceb2fc1941fdb7529824743e3f532e1583062bd768733afb6242adf4549fe8b315fabdba6c7415e59f1a3096f03c0bddbd1e
Download URL:

https://rosap.ntl.bts.gov/view/dot/77443/dot_77443_DS1.pdf
File Type:

[PDF - 1.16 MB ]

File Language:

English

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