ISO/TR 15655:2003
防火.高温下对防火工程设计用结构材料的热物理和机械特性的试验

Fire resistance - Tests for thermo-physical and mechanical properties of structural materials at elevated temperatures for fire engineering design

被代替

标准号

ISO/TR 15655:2003

发布

2003年

发布单位

国际标准化组织

替代标准

ISO/TR 15655:2020

当前最新

ISO/TR 15655:2020

 

 

适用范围

This Technical Report identifies test methods already in existence and provides guidance on those that need to be developed to characterize the thermo-physical and mechanical properties of structural materials at elevated temperatures for use in fire safety engineering calculations. It is applicable to materials used in load-bearing construction in which structural and thermal calculations might be required to assess the performance of elements or systems exposed to either standard fire tests, real or design fire heating conditions. It is recognized that the elevated temperature properties of materials can be determined under a variety of conditions. Since fire is a relatively short transient process lasting from a few minutes to several hours, ideally, the properties determined should reflect the transient thermal and loading conditions as well as the duration of heating that may be experienced in practice. However, it is also recognized that some properties are relatively insensitive to the transient conditions and therefore, alternative steady state test methods may be appropriate. Some properties are sensitive to orientation effects, for example timber, and these should be considered with respect to how the tests are conducted. In cases where materials undergo either a chemical or a physical reaction during the heating process, it might be impossible to determine an individual property. This Technical Report gives guidance in selecting a test method to determine an effective value representing a combination of properties. It is also recognized that a test specimen may be comprised of a small construction such as that used in the testing of masonry. This often involves building a mini assembly to form a pyramid in order to represent the true behaviour. Apart from the traditional construction materials such as metals, concrete, masonry and wood, the use of plastics and fibre reinforcement is becoming more common. Therefore these materials have also been included in this Technical Report to reflect possible future changes in design and advances in materials technology. In the past, the behaviour of jointing systems in fire has only received a little interest yet their behaviour is fundamental to the performance of composite elements and structural frames. This Technical Report also addresses jointing systems under individual materials, for example welds for steel, glues for timber. However, in many cases, the end use of an adhesive is not clear or it covers a range of applications. For this reason a separate category for adhesives is included. For some materials, it has not been possible to identify an existing standard or laboratory procedure for conducting tests at elevated temperatures under either steady state or transient heating conditions. In these cases, standards for conducting tests at ambient temperature are identified. These may be considered to form the basis for development into a test method suitable at elevated temperatures. Based upon current fire design methodologies and those that are beginning to receive attention, Table 1 and Table 2 summarize the requirements and availability of test methods for measuring the thermal and mechanical properties considered to have an immediate priority. NOTE For composite concrete and steel structures the material properties required are addressed under each individual material.

ISO/TR 15655:2003相似标准

推荐