International Concrete Abstracts Portal

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 23 Abstracts search results

Document: 

SP120-06

Date: 

June 1, 1990

Author(s):

Pham Xuan Thao

Publication:

Symposium Papers

Volume:

120

Abstract:

The use of tendons placed outside the concrete for the longitudinal prestressing of bridge decks is particularly well suited to the triangulated trusses that have now proven effective. Experience acquired first on the Tehran Stadium roofing (internal tendons) and then on the externally prestressed Bubiyan Bridge in Kuwait has highlighted the numerous advantages to be derived from the latter system. The technology has, therefore, been used again, with external tendons, in the construction of the Sylans and Glacieres viaducts located along the Macon-Geneva-Mont Blanc highway in France, on behalf of the Societe des Autoroutes Paris Rhin-Rhone. The two viaducts have a total length of 1500 m. Each consists of two parallel decks, 10.75 m wide. Typical spans are 60 m long. The deck is precast in forms as a series of 4.66 m long elements and erected by sequential cantilevering using a launching girder.

DOI:

10.14359/3424


Document: 

SP120-07

Date: 

June 1, 1990

Author(s):

Alan Matejowsky

Publication:

Symposium Papers

Volume:

120

Abstract:

The state of Texas is involved in two projects that use precast concrete segmental erection methods with external post-tensioning tendons. Design and construction features of these projects, along with construction problems related to external tendons, are described. The future of segmental construction and use of external tendons in Texas are discussed.

DOI:

10.14359/3428


Document: 

SP120-19

Date: 

June 1, 1990

Author(s):

Michael E. Kreger Gregory L. Fenves, and Kamal C. El-Habr

Publication:

Symposium Papers

Volume:

120

Abstract:

A nonlinear finite element analysis was conducted to examine the full range of behavior of segmentally precast box girder construction with external post-tensioning tendons. A primary objective of the study was to examine the effect of dry joints (without epoxy) on the strength and ductility of box girder construction. A secondary consideration was the influence of supplemental bonded internal tendons on the behavior of the structure.

DOI:

10.14359/2859


Document: 

SP120-20

Date: 

June 1, 1990

Author(s):

Jeanne M. Nagele, Sankar C. Das, and Reda M. Bakeer

Publication:

Symposium Papers

Volume:

120

Abstract:

The purpose of this investigation was to examine the forces developing in the dome of a prestressed concrete nuclear containment structure due to prestressing of vertical tendons. A computer program was developed for personal computers to evaluate the effect of prestressing forces. A parametric study was conducted, using the program, to examine the effects of dimensions, prestressing force, properties of tendons, etc. on the resulting stresses in the dome.

DOI:

10.14359/2862


Document: 

SP120-21

Date: 

June 1, 1990

Author(s):

Eilhard WoelfelI

Publication:

Symposium Papers

Volume:

120

Abstract:

In the near future, prestressed concrete structures will be designed in Europe according to Eurocode 2 (EC 2). The EC 2 principles governing the design of structures with bonded tendons and with external tendons are given in this paper, and a comparison is made between the structural behavior of the two different types of structures. It is shown that the reliability of both is comparable if the characteristic strain due to prestressing is introduced in the calculations.

DOI:

10.14359/2865


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