1.1 本试验方法测定了纤维增强聚合物基（FRP）复合钢筋的准静态纵向拉伸强度和延伸性能，纤维增强聚合物基复合钢筋通常用作钢筋、预应力或后张混凝土中的拉伸元件。 注1: 测定聚合物基复合材料拉伸性能的其他程序可在试验方法中找到 D3039/D3039M 和 D3916 . 1.2 根据具体应用，用于加固硅酸盐水泥混凝土的线性元件被称为钢筋、钢筋、杆或钢筋束。本试验方法适用于本方法所述限制范围内的所有此类钢筋。在本试验方法中，供试品称为棒材。一般来说，钢筋具有实心十字- 表面起伏的截面和规则图案或粘结颗粒涂层，或两者兼有，促进钢筋和混凝土之间的机械联锁。该测试方法也适用于从网格中切割的直线段。提供了钢筋和格栅制备和测试的具体细节。在某些情况下，可能需要使用锚来防止钢筋或格栅端部因夹持引起的损坏。灌浆型锚的建议见 附录X1 . 1.3 该方法提供的强度值是短期静态强度，不考虑持续静态或疲劳载荷。可能需要额外的材料特性，尤其是在高水平持续或重复荷载下使用的钢筋。 1.4 单位- 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。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.4.1 在文本中，英寸-磅单位显示在括号中。 1.5 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。 1.6 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 本试验方法旨在产生纵向抗拉强度和伸长率数据。从拉伸试验中，获得了设计所需的各种数据。与测量的钢筋拉伸响应相关的测试因素包括试样制备、试样调节、测试环境、试样对齐和夹持以及测试速度。在试验方向上，可从本试验方法中获得的特性包括: 5.1.1 最大拉力， 5.1.2 极限抗拉强度， 5.1.3 极限拉伸应变， 5.1.4 拉伸弦弹性模量，以及 5.1.5 应力-应变曲线。

1.1 This test method determines the quasi-static longitudinal tensile strength and elongation properties of fiber reinforced polymer matrix (FRP) composite bars commonly used as tensile elements in reinforced, prestressed, or post-tensioned concrete. Note 1: Additional procedures for determining tensile properties of polymer matrix composites may be found in Test Methods D3039/D3039M and D3916 . 1.2 Linear elements used for reinforcing Portland cement concrete are referred to as bars, rebar, rods, or tendons, depending on the specific application. This test method is applicable to all such reinforcements within the limitations noted in the method. The test articles are referred to as bars in this test method. In general, bars have solid cross-sections and a regular pattern of surface undulations or a coating of bonded particles, or both, that promote mechanical interlock between the bar and concrete. The test method is also appropriate for use with linear segments cut from a grid. Specific details for preparing and testing of bars and grids are provided. In some cases, anchors may be necessary to prevent grip-induced damage to the ends of the bar or grid. Suggestions for a grouted type of anchor are provided in Appendix X1 . 1.3 The strength values provided by this method are short-term static strengths that do not account for sustained static or fatigue loading. Additional material characterization may be required, especially for bars that are to be used under high levels of sustained or repeated loading. 1.4 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.4.1 Within the text, the inch-pound units are shown in brackets. 1.5 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. 1.6 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 test method is designed to produce longitudinal tensile strength and elongation data. From a tension test, a variety of data are acquired that are needed for design purposes. Test factors relevant to the measured tensile response of bars include specimen preparation, specimen conditioning, environment of testing, specimen alignment and gripping, and speed of testing. Properties, in the test direction, that may be obtained from this test method include: 5.1.1 Maximum tensile force, 5.1.2 Ultimate tensile strength, 5.1.3 Ultimate tensile strain, 5.1.4 Tensile chord modulus of elasticity, and 5.1.5 Stress-strain curve.