Design of Thick-Walled Multiple Opening Conduits to Resist Large Distributed Loads.
Abstract
The design of multiple opening reinforced concrete conduits suitable for use as waterways through and under large earth-fill dams is discussed. The loadings considered are given values, and are not a subject of this investigation. Vertical overburden pressures up to 30 k/square ft, corresponding to about 250 ft. of fill, are considered. The resultant structures have members with low span/depth ratios, and the analysis and design of these structures is discussed, in a number of steps. The idealization of the thick-walled structure into a frame of linear elements is discussed, with particular attention to the joint areas. The analysis of the idealized frame is then considered. After the basic analysis is done, moments, shears, and thrusts must be found for the critical cross sections, and the selection of these sections is discussed. A criterion for the shear strengths of the deep members used in the conduits is presented. This is based on tests of models done earlier in the investigation, and has been checked against the results of other deep beam tests. The flexural reinforcement and the detailing of the flexural steel are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA039259
Entities
People
- William L. Gamble
Organizations
- University of Illinois Urbana–Champaign