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International Concrete Abstracts Portal

Showing 1-9 of 9 Abstracts search results

Document: 

SP310-32

Date: 

March 17, 2017

Author(s):

Rolf Breitenbücher; Günther Meschke; Fanbing Song; Michael Hofmann; Yijian Zhan

Publication:

Special Publication

Volume:

31

Abstract:

To investigate the behaviour of precast tunnel lining segments subjected to concentrated loads on a small scale, laboratory tests on concrete prisms under partial-area loading in conjunction with numerical analyses were performed. Various parameters influencing the load-bearing and fracture behaviour of plain concrete (PC) and steel-fibre-reinforced concrete (SFRC) under concentrated loads are considered, including fibre properties (dimension, aspect ratio, tensile strength), fibre dosage and orientation, area ratio and eccentricity of load. The effects of these parameters on the ultimate bearing capacity, stress-displacement behaviour, failure mode and crack characteristics are analysed and discussed. Parallel to the experimental investigations, numerical simulations using a continuum coupled damageplasticity model for triaxially loaded cementitious material were performed. It is shown that the numerical analysis is able to realistically capture the structural behaviour and the crack pattern of partially loaded PC and SFRC specimens.


Document: 

SP31-07

Date: 

January 1, 1972

Author(s):

S. Zundelevich and J. Benjamin

Publication:

Special Publication

Volume:

31

Abstract:

The theory of probability is used to solve the problem of forecasting the delfection of reinforced concrete beams. Nonhomogeneous Markov Processes are described. The development of a probabilistic method is presented in a manner which can be readily applied. In predicting deflections of reinforced concrete beams, a solution of empirical nature is used. The predictions show good agreement with labortary tests.

10.14359/17927


Document: 

SP31-06

Date: 

January 1, 1972

Author(s):

Ernst Basler

Publication:

Special Publication

Volume:

31

Abstract:

Structural safety is analyzed by means of a simple model of the design procedure. All potential uncertainties which may affect the safety are classified in 9 groups of errors. The characteristics of three different measures of structural safety are briefly discussed and particular emphasis is given to a new yardstick for safety, the "coefficient of variation of a structural design."

10.14359/17926


Document: 

SP31-05

Date: 

January 1, 1972

Author(s):

Jack R. Benjamin and Haresh C. Shah

Publication:

Special Publication

Volume:

31

Abstract:

The purpose of this paper is to provide the structural engineer with a simple probabilistic forecast of structural response. The procedure fits within all existing codes and is simple to understand and use.

10.14359/17925


Document: 

SP31-04

Date: 

January 1, 1972

Author(s):

C. Allin Cornell

Publication:

Special Publication

Volume:

31

Abstract:

This paper presents a number of illustrations of the development of equations and numerical values of coefficients of variations for use in probability-based structural codes. . .Several different functional forms of equations are illustrated, and several different sources of uncertainty are included (material properties, member dimensions, and equation inaccuracies). The results provide characteristic values of these resistances. General conclusions are drawn as to the kinds of information which committees should report and as to what factors must be considered in the evaluation of coefficients of variation as mesaures of uncertainty. . .A two-phrase implementation of probability-based codes is recommended.

10.14359/17924


Document: 

SP31-03

Date: 

January 1, 1972

Author(s):

N.C. Lind and A.G. Davenport

Publication:

Special Publication

Volume:

31

Abstract:

The objective of the paper is to describe recent Canadian developments concerned with the theory and application of structural reliability approaches. . .Recent developments in the ocde application of probability based concepts are also described.

10.14359/17923


Document: 

SP31-02

Date: 

January 1, 1972

Author(s):

J. Ferry Borges and M. Castanheta

Publication:

Special Publication

Volume:

31

Abstract:

A statistical treatment of the problem of combination of different types of loadings involves a suitable definition of each of the loads to be combined. In the idealization adopted each load is assumed constant during given intervals of time, and variable from interval to interval according to an uncorrelated stochastic process. Further, variability from structure to structure and variability in time are assumed to be equivalent. . .The results obtained give a clear understanding on how to perform the combination of loads and on how to choose the load factors. . .

10.14359/17922


Document: 

SP31-01

Date: 

January 1, 1972

Author(s):

E. Rosenblueth and L. Esteva

Publication:

Special Publication

Volume:

31

Abstract:

A strategy is suggested for the evolution of building codees towards their ideal format; reliability optimization.

10.14359/17921


Document: 

SP31

Date: 

January 1, 1972

Author(s):

Editors: Bertold E. Weinberg and Jack R. Benjamin

Publication:

Special Publication

Volume:

31

Abstract:

SP31 Contains seven papers and one committee report on applications of probabilistic principles to design of reinforced concrete structures. The first five papers were presented in a Symposium on Probabilistic Design as a part of the Annual Convention of the American Concrete Institute in Denver, Colorado, March 12, 1971.

10.14359/14084


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