【摘要】 本文采用局部原尺寸试验与数值模拟相结合的方法，阐明了灌浆连接段轴向破坏模式，并通过修正后的有限元模型，探究了剪力键高度与间距对灌浆连接段整体受力性能及破坏模式的影响规律，旨在为优化设计提供依据。研究结果表明：轴向极限承载力随剪力键间距变化幅度有限，但竖向位移对间距变化表现出更高的敏感性；剪力键小间距易形成集中斜裂缝，而大间距则可能导致脆性破坏；剪力键高度显著影响灌浆段承载机制与刚度，最小高度时，承载能力较低；高度变化不改变主要破坏角度但会影响损伤分布与破坏模式，过小或过大的高度会削弱性能；从强度、延性、破坏模式、应力分布以及施工成本等方面综合考量，推荐API与HSE建议的剪力键间距范围，推荐NORSOK与ISO建议的剪力键高度范围。更多还原

【Abstract】 This study adopts a combined approach of full-scale local test and numerical simulations to clarify our understanding of the axial damage modes of grouted connections. A modified finite element model is used to examine the influence of shear key height and spacing on the overall mechanical performance and failure patterns of grouted connections, aimed to provide a basis for optimized designs. The results indicate that the axial ultimate bearing capacity manifests limited variation with the shear key spacing, but vertical displacement is more sensitive to it. A small spacing tends to induce localized inclined cracks, while a large one may lead to brittle damage. Shear key height significantly influences the load-bearing mechanism and stiffness of the connection structure; at its minimum, the bearing capacity is relatively low. Its variation imposes a considerable effect on damage distribution and damage modes, but little on primary damage angles, reducing the performance of the connection structure if it is excessively small or excessively large. With a comprehensive consideration of the strength, ductility, failure mode, stress distribution, and construction cost, we recommend the shear key spacings suggested by API and HSE, and the shear key height ranges by NORSOK and ISO.更多还原