1.1 本试验方法概述了通常用作钢筋、预应力或后张混凝土中拉伸元件的纤维增强聚合物基（FRP）复合钢筋的拉伸蠕变断裂试验要求。 1.2 从该试验方法获得的数据用于设计持续荷载下的FRP钢筋。计算100万小时蠕变断裂能力的程序见 附件A1 . 1.3 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。在文本中，英寸-磅单位显示在括号中。每个系统中规定的值不是精确的等价物； 因此，每个系统必须相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 这种研究FRP筋蠕变断裂的方法旨在用于实验室试验，其中主要变量是FRP筋的尺寸或类型、施加力的大小和施加力的持续时间。与承受显著持续应力的钢筋或预应力筋不同，FRP筋的蠕变断裂可能发生在静态抗拉强度以下。因此，当确定用于抵抗持续荷载的混凝土构件中用作钢筋或钢筋束的FRP钢筋的可接受应力水平时，蠕变断裂强度是一个重要因素。 蠕变断裂强度因所用FRP钢筋的类型而异。 5.2 该试验方法测量了FRP筋在给定的受控环境条件和力比下的蠕变断裂时间。 5.3 本试验方法旨在确定材料规范、研发、质量保证以及结构设计和分析的蠕变断裂数据。主要测试结果是试样的百万小时蠕变断裂能力。 5.4 钢筋、后张或预应力混凝土结构的蠕变特性在设计中需要考虑。对于用作钢筋或钢筋束的FRP钢筋，应根据本文给出的方法测量蠕变断裂。

1.1 This test method outlines requirements for tensile creep rupture testing of fiber reinforced polymer matrix (FRP) composite bars commonly used as tensile elements in reinforced, prestressed, or post-tensioned concrete. 1.2 Data obtained from this test method are used in design of FRP reinforcements under sustained loading. The procedure for calculating the one-million hour creep-rupture capacity is provided in Annex A1 . 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This method for investigating creep rupture of FRP bars is intended for use in laboratory tests in which the principal variable is the size or type of FRP bars, magnitude of applied force, and duration of force application. Unlike steel reinforcing bars or prestressing tendons subjected to significant sustained stress, creep rupture of FRP bars may take place below the static tensile strength. Therefore, the creep rupture strength is an important factor when determining acceptable stress levels in FRP bars used as reinforcement or tendons in concrete members designed to resist sustained loads. Creep rupture strength varies according to the type of FRP bars used. 5.2 This test method measures the creep rupture time of FRP bars under a given set of controlled environmental conditions and force ratios. 5.3 This test method is intended to determine the creep rupture data for material specifications, research and development, quality assurance, and structural design and analysis. The primary test result is the million-hour creep rupture capacity of the specimen. 5.4 Creep properties of reinforced, post-tensioned, or prestressed concrete structures are important to be considered in design. For FRP bars used as reinforcing bars or tendons, the creep rupture shall be measured according to the method given herein.