防火试验.房屋建筑构件.第11部分:结构钢构件防火评估的具体要求

[中文适用范围]： ISO 834 本部分详述的评估旨在涵盖一系列防火材料厚度、一系列以其截面系数为特征的钢型材、一系列设计温度和一系列有效的耐火分类期。ISO 834 本部分涵盖了本文件中定义的包括被动材料（板、垫、板坯和喷涂材料）和反应材料的防火系统。评估程序用于确定 a) 基于从测试加载和未加载样品获得的温度数据，确定防火系统使用的校正系数和实际限制（物理性能）；b) 基于从测试未加载的短钢样品获得的温度数据，确定防火材料的热性能（热性能）。评估结果适用于预制型材。评估结果的适用范围与允许将结果直接应用于不同钢型材尺寸和强度等级（但不包括不锈钢）以及测试的防火系统一起定义。根据 ISO 834-10 获得的试验结果和 ISO 834 本部分中的评估结果可直接适用于“I”和“H”横截面积的型钢和空心型钢。I 型钢或 H 型钢的分析结果可直接适用于相同截面系数的角钢、槽钢和 T 型钢，无论它们是用作单个构件还是用作装配式钢桁架的一部分。ISO 834 本部分不适用于混凝土填充的空心型钢、梁或柱，这些梁或柱上有任何类型或实心钢筋的孔洞或开口。任何评估方法均可接受，只要它符合 5.5 中给出的可接受性标准。常用评估方法的示例在附录 C 至 G 中给出。 [外文原描述]： The assessment detailed in ISO 834-11:2014 is designed to cover a range of thicknesses of the fire protection material, a range of steel sections characterized by their section factors, a range of design temperatures, and a range of valid fire resistance classification periods. ISO 834-11:2014 covers fire protection systems that include both passive (boards, mats, slabs, and spray materials) and reactive materials as defined in this document. The assessment procedure is used to establish: a) on the basis of the temperature data derived from testing loaded and unloaded specimens, a correction factor and practical constraints on the use of the fire protection system (the physical performance), and b) on the basis of the temperature data derived from testing unloaded short steel specimens, the thermal properties of the fire protection material (the thermal performance). The limits of applicability of the results of the assessment are defined together with permitted direct application of the results to different steel section sizes and strength grades (but not stainless steels) and to the fire protection system tested. The results of the tests obtained according to ISO 834‑10 and the assessment in this part of ISO 834 are directly applicable to steel sections of "I" and "H" cross-sectional shape and hollow sections. Results from analysis of I or H sections are directly applicable to angles, channels, and T-sections for the same section factor, whether used as individual elements or as part of a fabricated steel truss. The results of the assessment are applicable to fabricated sections. ISO 834-11:2014 does not apply to concrete-filled hollow sections, beams, or columns containing holes or openings of any type or solid bar.