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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 16 Abstracts search results
Document:
SP-273
Date:
September 20, 2010
Author(s):
Editors: Karl-Heinz Reineck and Lawrence C. Novak / Sponsored by Joint ACI-ASCE Committee 445
Publication:
Symposium Papers
Volume:
273
Abstract:
This Special Publication contains 15 papers that were presented at technical sessions sponsored by Joint ACI-ASCE Committee 445, Shear and Torsion, at the 2010 ACI Spring Convention in Chicago, IL. Topics covered in the papers include an introduction to the method, design examples, common problems experienced in real design applications, additional guidance for use the strut-and-tie model (STM), and an assessment of existing requirements. Note: The individual papers are also available. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP-273
DOI:
10.14359/51682323
SP273-13
Trevor J. Kirkpatrick and Robert B. Anderson
This example demonstrates strut-and-tie principles to design an internal diaphragm for an extradosed cable stayed bridge with a cast-in-place segmental box girder. The diaphragm carries vertical shear from the webs of the box girder around access openings to the indirect bearings on a tower strut. Several models are investigated before the design model is presented. Tie forces are determined, and reinforcing steel is selected. A computer program is introduced to perform the detailed (and often iterative) stress checks for the struts and nodal zones, and sample calculations for the struts and nodal zone stresses are provided.
10.14359/51682301
SP273-14
Denis Mitchell, William D. Cook, and Ting Peng
This paper describes the collapse of the Concorde Overpass that was partly due to improper hanger reinforcement details in the disturbed region (D-region) of the beam seat. A review of the evolution of the hanger reinforcement details in dapped end beams given in different versions of the PCI Design Handbook is presented. The results of a series of experiments on dapped end beams with different hanger reinforcement details are described. Guidance from these tests and other experiments on the details of anchorage of the hanger reinforcement in dapped end beams is provided.
10.14359/51682302
SP273-08
Katrin Habel, Matthias F. Andermatt, and Adam S. Lubell
The load carrying capacity of the hinge region of an existing highway overpass is evaluated using the strut-and-tie modeling techniques of ACI 318-08 Appendix A. The overpass consists of a series of drop-in span girders supported at the center by doubly cantilevered pier girders. The hinge is achieved through the use of an incorporated steel piece, the so-called Cazaly hanger, in the ends of the span girders. This example examines the disturbed end regions of both the span girders and the pier girders. The strut-and-tie model demonstrates how the Cazaly hanger can be incorporated into the model. In addition, the girders are prestressed which is taken into account by modeling the prestressing as equivalent forces applied to the concrete. This example demonstrates how to evaluate the load carrying capacity of an existing concrete structure and how to develop a strut-and-tie model based on the existing reinforcement configuration.
10.14359/51682296
SP273-12
Richard J. Beaupre, Robert B. Anderson, and Velvet Bridges
This example demonstrates strut-and-tie principles to design an internal diaphragm for a segmental concrete girder bridge. The diaphragm carries vertical shear and torsion from the webs of the box girder around the access opening to the bearings on the pier cap. Tie forces are determined, and reinforcing steel is selected. Stress checks for the struts and nodal zone are provided.
10.14359/51682300
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