In 1978, the block shear failure mode was first observed in the coped beams while investigating the bearing capacity of bolted shear connections. Later, this mode of failure was also observed in several bolted as well as welded connections, including tension member connection in angles and tees, and gusset plates. Subsequently, design provisions for block shear failure were implemented in the AISC specification. In this paper, a total of 78 coped beams, 75 angles and tees, 14 flange-connected tees, and 182 gusset plate specimens which failed in block shear are evaluated and comparison has been made against the present design standards. American, Indian, European, Canadian, Japanese and Saudi Arabian design provisions are used for comparative study. A compatible relation between test-to-predicted ratio for these specimens is obtained from a wide range of geometries, steel grade, and connection type. In addition, the comparative evaluation is made for the one-bolt line as well as two-bolt line connection which failed in block shear only. These design standards provide a conservative prediction for one-bolt line connection except Canadian standard; however, for two-bolt line connection, these standards provide a significantly conservative prediction.

中文翻译：

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不同连接处的块剪切破坏行为

1978 年，在研究螺栓剪切连接的承载能力时，首次在应对梁中观察到块剪切破坏模式。后来，在几个螺栓连接和焊接连接中也观察到了这种失效模式，包括角钢和三通中的受拉构件连接以及角撑板。随后，在 AISC 规范中实施了块体剪切破坏的设计规定。在本文中，总共评估了 78 个上合梁、75 个角钢和三通、14 个法兰连接的三通和 182 个在块剪切中失败的节点板试样，并与当前的设计标准进行了比较。美国、印度、欧洲、加拿大、日本和沙特阿拉伯的设计规定用于比较研究。这些试样的测试与预测比率之间的兼容关系是从各种几何形状、钢种和连接类型中获得的。此外，对仅在块体剪切中失败的单螺栓线和双螺栓线连接进行了比较评估。除加拿大标准外，这些设计标准对单螺栓线路连接提供了保守的预测；然而，对于双螺栓线连接，这些标准提供了非常保守的预测。