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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:
SP90-08
Date:
April 1, 1986
Author(s):
M. K. Hurd and P. D. Courtois
Publication:
Symposium Papers
Volume:
90
Abstract:
Presents a basic analytical method for shoring and re-shoring loads of multistory buildings. Discusses the factors that must be considered, the assumptions for simplification of the analysis and shows the method for determining the estimated loads that will be transferred to the structure. Presents the procedure required to determine the ability of the structure to resist the estimated loads with an appropriate safety factor and the adjustments to the construction procedure that must be made in the event the applied loads are in excess of the capacity of the structure.
DOI:
10.14359/10061
SP90-03
Eliot Locitzer
Architectural concrete was selected as the material for all the prime public spaces in the New York Exposition and Convention Center. A construction oriented design provided the basis for high-quality formwork and finish on a fast-track, construction-managed, and government-owned job. Drawings, specifications, and on-site inspection requirements for a large scale, architectural concrete building are discussed using this job as an example. Construction progress is highlighted with particular emphasis on formwork in the context of architectural design, sequence of construction, reinforcing bar design, and quality control.
10.14359/1767
SP90-13
Stephen Timpson and James M. Henry
The Westbury Condominium Project is a forty story reinforced concrete tower surrounded by a five-story garage. The horizontal dimensions of the tower are only 41 x 41 ft. The design and construction management team worked within rigid parking, set-back, and height restrictions to produce a marketable building design on a difficult site in a heavily developed area. The contractor used time-lapse film analysis, video observation and an ongoing work crew training and motivation program to achieve a sustained 1.25 working day per tower floor construction cycle.
10.14359/1775
SP90-14
Muthia Kasi
In the last systematic review of reinforced concrete column costs in 1973, ACI Committee 439 limited its cost comparisons to concrete strengths from 4000 to 8000 psi and reinforcing steels with design yield of 60,000 psi with speculative estimates of steel with 80,000 psi yield. Design then was based upon the 1971 ACI Building Code. At that time the leading structural engineers had successfully utilized concrete with f'c = 9000 psi under the current code. A number of general conclusions on costs were presented as trends. To bring this review of reinforced concrete column costs up to date, we must consider changes in code requirements, more general availability of still higher strength concretes, superplasticizer admixtures, building code limitations and general lack of economy in a Grade 80 reinforcement, and later laboratory testing and field research on properties and performance of high-strength concretes. A recent detailed comparative cost study of reinforced concrete columns which resulted in appreciable cost savings in a Chicago high-rise building, reinforces some of the 1973 report under conditions today. As might be expected in dealing with the numerous variables involved in comparative column design costs, the detailed study was made effective only through a computer program. The essential features of this program are described in detail in the CRSI Bulletin.
10.14359/1776
SP90-05
Harry B. Lancelot.
Dowel bar substitution is a new phrase but not a new solution. The technique provides a productive means of splicing across construction joints. Examples of the application are shown and discussed in this article.
10.14359/1769
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