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International Concrete Abstracts Portal

Showing 1-5 of 13 Abstracts search results

Document: 

SP80-06

Date: 

July 1, 1983

Author(s):

U. Schneider, H. Bub, and M. Kersken-Bradley

Publication:

Symposium Papers

Volume:

80

Abstract:

Traditionally, requirements concerning structural fire protection are established from safety considerations based on an empirical or intuitive approach. Long years' experience generally results in acknowledged and presumably sound requirements for buildings with normal use. When assessing industrial buildings, however, the range of experience is often exceeded. Eventually, de-cisions on structural measures to be provided may be made on the expense of economy. This presentation introduces a probabilistic concept for expressing safety considerations in terms of tolerable failure probabilities applying to structural members subject to fire exposure. These probabilities are derived regarding the contribution of structural measures as well as fire fighting measures to the general reliability of structures liable to be exposed to fire. Eventually, the significance of structural measures - especially member design -vanishes, if fire fighting measures reduce the probability for se-vere fires to a negligible level. Two different design methods for proving compliance with reliability requirements derived on these premises are proposed. Application of the first method - based on heat balance calculations - is pref-erably confined to special structures and scientific studies. The second method - based on the equivalent fire duration - allows a simple individual appraisal of industrial projects with respect to the required fire resistance of structural members. Within this contribution, special reference is made to industrial buildings. However, application of this approach to other types of buildings is apparent.

DOI:

10.14359/6590


Document: 

SP80

Date: 

July 1, 1983

Author(s):

Editor: Melvin S. Abrams

Publication:

Symposium Papers

Volume:

80

Abstract:

SP80 Today, with the public focus on fires in commercial buildings, this ACI book becomes must reading for designers. It's the full report of a symposium devoted to current advances in research and practice related to fire safety of concrete structures. Twelve major papers discuss: Analysis and Design of Buildings for Fire Resistance; Design Guidelines for Fire-Resistant Buildings; and Damage and Repair of Concrete Structures Exposed to Fire.

DOI:

10.14359/14037


Document: 

SP80-03

Date: 

July 1, 1983

Author(s):

T.Z. Harmathy

Publication:

Symposium Papers

Volume:

80

Abstract:

Knowledge in fire science is sufficiently advanced to provide fire safety in buildings on the basis of engineering design rather than authoritative decisions. Although two important factors in the design considerations, fire load and ventilation, are random variables, conservative design values for them can be found by stochastic and extreme value studies. With these values the design for fire safety is fully deterministic. The design for fire safety has two components: countering the destructive spread potential of fire by the use of fire-resistant compartment boundaries, and countering its convective spread potential by the use of self-closing doors, fire drainage, and flame deflectors. The fire resistance requirements are determined by the normalized heat load on the compartment boundaries which is derived in the course of the design procedure. When dealing with the performance in fire of some key elements of the building, extra precautions are necessary.

DOI:

10.14359/6587


Document: 

SP80-02

Date: 

July 1, 1983

Author(s):

Boris Bresler and Robert H. Iding

Publication:

Symposium Papers

Volume:

80

Abstract:

The thermal and structural responses of prestressed concrete elements under ASTM E-119 fire test exposure were studied analytically. Comparisons of analytical results with experimentally recorded local temperatures and deflections for specimens tested by the Portland Cement Association showed good agreement. In addition, stress histories in concrete and in steel tendons and extent of cracking in concrete during the fire test exposures were determined analytically. Sensitivities in material characterization at elevated temperatures and other modeling uncertainties are discussed.

DOI:

10.14359/6586


Document: 

SP80-11

Date: 

July 1, 1983

Author(s):

E. Arioglu, K. Anadol, and A. Candogan

Publication:

Symposium Papers

Volume:

80

Abstract:

In this article, a fire which took place in the largest underground shopping center of Istanbul, Turkey and its after-fire repair and strengthening project prepared by the authors are reported. First the structural system of the shopping center is de-scribed and information is given on the fire. After-fire surveys and main features of the repair and strengthening project are then summarized. In the conclusions, general concepts related to fire effects on reinforced concrete structures and observations made during the study are discussed.

DOI:

10.14359/6595


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