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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 17 Abstracts search results
Document:
SP133-12
Date:
September 1, 1992
Author(s):
Dan M. Frangopol
Publication:
Symposium Papers
Volume:
133
Abstract:
A formulation is presented for extending structural system design concepts from safety and serviceability to damage tolerability. The assumptions necessary to implement damage tolerability concepts in structural system design are explained using both deterministic and probabilistic approaches. A particular emphasis is placed upon redundancy measures and their use in system damage-tolerant optimum design. Examples of solutions for optimum system design for safety, serviceability, and damage tolerability are presented.
DOI:
10.14359/3163
SP133-14
W. B. Cranst
The introduction of limit state design into the UK code for structural concrete in the 1960s is reviewed. The objections and controversies aroused are described. A selection of probability studies carried out in the interim is discussed and a possible way forward is outlined.
10.14359/3168
SP133-15
H. Omar and g. Morris
The behavior of laterally loaded flat-plate structures is strongly influenced by the nonlinear deformations at the plate-to-column connections. In this paper, a simple procedure is described for predicting the nonlinear moment-rotation behavior of flat-plate-to-column connections. That behavior is expressed by standardized moment-rotation functions. These functions were derived using a modified Rambert-Osgood function and all available experimental data. The influence of the most significant connection parameters such as the steel ratio, concrete strength, gravity loading, etc., on the connection behavior is incorporated into the functions. A physical model of the column region is described which facilitates the incorporation of the functions into a structural analysis computer program. The accuracy of the functions has been demonstrated for several plate-column connections. The computer analysis program is also described and an example is considered to compare results obtained from the program with those published in the literature.
10.14359/3174
SP133-01
Edward G. Nawy
This paper presents the state of the art in evaluating flexural crack development and control of macrocracking. It is based on extensive research over the past five decades, in the United States and overseas, in the area of macrocracking in reinforced and prestressed concrete beams and in two-way action slabs and plates With the advent of limit states theories that generally lead to economic proportioning of members, control of cracking has become essential to maintain the integrity and esthetics of concrete structures. The trend is stronger than ever in better utilization of current concrete strengths, use of higher strength concretes that include super-strength concretes of 20,000 psi (138 MPa) compressive strength and higher, and increased application of prestressed concrete concepts. All these trends require closer control of serviceability requirements in cracking and deflection. Design expressions are given for the control of cracking in reinforced concrete beams and thick one-way slabs; prestressed, pretensioned, and post-tensioned flanged beams; and reinforced concrete two-way action structural floor slabs and plates. In addition, recommendations are given for the maximum tolerable flexural crack widths in concrete elements.
10.14359/3131
SP133-02
Andrew Scanlon and Ross B. Corotis
The American Concrete Institute, Standard 318, Building Code Requirements for Reinforced Concrete have permitted the design of reinforced concrete structures in accordance with limit state principles using load and resistance factors since 1963. A probabilistic assessment of these factors and implied safety levels is made, along with consideration of alternate factor values and formats. A discussion of issues related to construction safety and safety of existing structures is included.
10.14359/3138
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