1.1 本试验方法包括通过沿一条对角线施加压力来测定砌体组合的对角线抗拉或剪切强度（见 图1 )，从而导致对角拉伸破坏，试样平行于荷载方向分开。 图1 测定砌体组合对角抗拉或抗剪强度的装置 1.2 附件A1 提供了有关在组合斜拉和压缩荷载下测定砌体斜拉强度的要求。 1.3 这些测试方法涵盖了使用英寸-磅或国际单位制进行测试的应用。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可能不是精确的等效值； 因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.4 本标准可能涉及危险材料、操作和设备。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====== 3.1 与其他可用方法相比，该试验方法旨在更准确地测量砌体的对角拉伸（剪切）强度。样本尺寸被选为最小尺寸，合理代表全尺寸砌体组合，并允许使用许多实验室使用的试验机。 注1: 作为一种仅用于评估变量（如砌块类型、砂浆、工艺等）影响的研究测试方法，如果可用测试设备无法容纳1.2米[4英尺]的方形试样，则可以使用较小尺寸的试样。然而，缺乏能够评估试样尺寸对抗剪强度影响的实验数据，或能够在小样本试验结果之间建立相关性的实验数据- 比例试样试验和较大试样。

1.1 This test method covers determination of the diagonal tensile or shear strength of masonry assemblages by loading them in compression along one diagonal (see Fig. 1 ), thus causing a diagonal tension failure with the specimen splitting apart parallel to the direction of load. FIG. 1 Apparatus for Determination of Diagonal Tensile or Shear Strength Masonry Assemblages 1.2 Annex A1 provides requirements regarding the determination of the diagonal-tension strength of masonry under combined diagonal-tension and compressive loading. 1.3 These test methods cover the application of the tests using either inch-pound or SI units. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4 This standard may involve hazardous materials, operations, and equipment. 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 ====== 3.1 This test method was developed to measure more accurately the diagonal tensile (shear) strength of masonry than was possible with other available methods. The specimen size was selected as being the smallest that would be reasonably representative of a full-size masonry assemblage and that would permit the use of testing machines such as are used by many laboratories. Note 1: As a research test method used only for the purpose of evaluating the effects of variables such as type of masonry unit, mortar, workmanship, etc., a smaller size specimen could be used if the available testing equipment will not accommodate a 1.2-m [4-ft] square specimen. However, there is a lack of experimental data that would permit an evaluation of the effect of specimen size on the shear strength or to permit a correlation between the results of small-scale specimen tests and larger specimens.