ANALYSIS OF BEAMS WITH NONUNIFORM TEMPERATURE PROFILE DUE TO FIRE EXPOSURE

被引：22

作者：

BURGESS, IW

ELRIMAWI, JA

PLANK, RJ

机构：

[1] Department of Civil and Structural Engineering, University of Sheffield, Sheffield, S10 2TN, Western Bank

[2] Department of Architecture, University of Sheffield, Sheffield, S10 2TN, Western Bank

来源：

JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH | 1990年 / 16卷 / 03期

关键词：

D O I：

10.1016/0143-974X(90)90008-5

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In general the temperature profile within a steel beam subjected to fire is non-uniform. To predict the structural behavior of such a beam the effect of the variation of the steel's characteristics with temperature across the beam must be considered. In addition stresses due to non-uniform thermal expansion need to be included. A procedure for the analysis of such cross-sections with a non-uniform temperature profile is presented. This has been developed specifically to be used on personal computers, rather than the mainframes normally employed for numerical analysis of this degree of complexity. The actual temperature profile is idealised by a finite number of constant temperature steps, and the thermal stresses induced are converted to a set of external loads. These are used in a secant stiffness approach to predict the deflection-temperature characteristics of beams. A comparison with test results for different types of beam illustrates the degree of accuracy that can be achieved using the techniques described.

引用

页码：169 / 192

页数：24

共 15 条

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