Reliability of Steel Columns Protected by Intumescent Coatings Subjected to Natural Fires

verfasst von: Chao Zhang

Verlag: Springer Berlin Heidelberg

Buchreihe : Springer Theses

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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Über dieses Buch

This thesis studied the effect of aging of intumescent coatings (ICs) on the reliability of protected steel columns in fire condition and developed a probabilistic approach to assess the service life of ICs applied on steel columns. In the study, Monte Carlo simulations were conducted to obtain the reliability index or failure probability of steel columns protected by ICs subjected to compartment fires. The effect of aging of intumescent coatings on the failure probability of protected steel columns was investigated by using variable insulation property of intumescent coatings in the simulation. The test data on aging effect on insulation property of intumescent coatings from literature was used. Based on the reliability analysis, a probabilistic approach is given to determine the service life of intumescent coatings for steel columns. In that approach, the failure probability of the protected steel columns is compared with the target probability of the structural fire design. The approach can also be used for probabilistic analysis of steel columns protected by conventional inert fire protection materials.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract

In prescriptive codes, steel structures are commonly requested to be protected with thermal insulation to achieve the specified fire resistance ratings.

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Chapter 2. Fire Modeling

Abstract

A real fire will generally undergo six stages which include ignition, growth, flashover, full fire development or steady burning, decay and extinguishment.

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Chapter 3. Steel Temperature in Natural Fires

Abstract

Post-flashover fires are widely adopted to represent natural fires. In literature, the temperature of a steel member exposed to a post-flashover fire is usually determined by first modeling the fire phenomenon by a empirical correlation (e.g. parameter fire model [1]) or advanced compute simulation (e.g. Fire Dynamic Simulation [2]) to obtain a temperature-time curve to represent the fire environment, then substituting the fire curve into a 1D condensed heat transfer model to obtain the steel temperature [3].

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Chapter 4. Thermal Properties of Intumescent Coatings in Fire

Abstract

Intumescent coatings, by their advantages like attractive appearance, potential for off-site application and practically taking no space, are now the dominant passive fire protection materials used in industrial and public buildings [1].

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Chapter 5. Behavior of Steel Columns in Fire

Abstract

Columns are the critical building components, failure of which usually leads to progressive collapse of the local or global structures.

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Chapter 6. Reliability Analysis

Abstract

This chapter presents the probabilistic study on reliability of steel columns protected by intumescent coatings to natural fires.

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Chapter 7. Service Life of Intumescent Coatings

Abstract

This chapter presents a probabilistic approach to determine the service life of intumescent coatings for steel columns. An example is provided to show the application of the approach.

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Chapter 8. Conclusions and Further Work

Abstract

This research is diverse and wide ranging. It has covered in some detail all areas necessary to determine the reliability of steel columns protected by intumescent coatings subjected to natural fires. One zone model for predicting the gas temperature of post-flashover fires and its sub-models have been reviewed in detail.

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Backmatter

Titel: Reliability of Steel Columns Protected by Intumescent Coatings Subjected to Natural Fires
verfasst von: Chao Zhang
Verlag: Springer Berlin Heidelberg
Electronic ISBN: 978-3-662-46379-6
Print ISBN: 978-3-662-46378-9
DOI: https://doi.org/10.1007/978-3-662-46379-6