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Experimental Research on One-Sided Bolted Beam-Column Joints Under Monotonic Loading
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摘要: 在已报道的T形方颈单边螺栓连接钢梁-钢管柱节点试验研究中，因柱壁鼓曲变形引起的螺栓拔出破坏较为典型。为避免钢管柱壁在梁端弯矩下发生弯曲变形，提高节点变形能力，提出了梁柱节点内置H钢加强措施，并对内置H钢组件的4个节点开展了单调荷载下的静力性能试验，探讨了H钢组件长度和板件厚度对节点结构响应的影响。试验结果表明，H钢组件可以避免节点发生螺栓拔出破坏，使节点的屈服弯矩和峰值弯矩分别提高69.3%~72.6%和22.5%~39.4%。建议T形方颈单边螺栓连接钢梁-钢管柱节点使用H钢外伸组件，组件截面根据节点内力设计。Abstract: In previously reported experimental studies on T-head square-neck one-sided bolted （TSOB） beam-to-square hollow section （SHS） column joints， bolt pull-out failure caused by the bulge deformation of the column wall has been identified as a typical failure mode. To prevent SHS wall deformation under the bending moment at the beam ends and to improve the deformation capacity of the joint， this paper proposes assembled H-steel strengthening measures for beam-column joints. Monotonic static load tests were conducted on four joints with H-steel components to explore the influence of the length and plate thickness of the strengthening components on the structural response of the joints. The test results showed that the H-steel components prevented bolt pull-out failure and increased the yield and peak bending moments of the joints by 69.3%-72.6% and 22.5%-39.4%， respectively. It is recommended that TSOB beam-to-SHS column joints use extended H-steel components， the cross-section of which should be designed according to the internal force of the joint.
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