| 郭宏超*,肖枫,李炎隆*,刘云贺.Q690高强钢螺栓抗剪连接承载性能试验研究[J].实验力学,2018,33(4):583~591 |
| Q690高强钢螺栓抗剪连接承载性能试验研究 |
| Experimental study on the bearing capacity of Q690 high strength steel bolted shear connection |
| 投稿时间：2017-03-06 修订日期：2017-05-27 |
| DOI：10.7520/1001-4888-17-046 |
| 中文关键词: 高强度钢材 抗剪连接 净截面 匹配性 螺栓连接 |
| 英文关键词:high strength steel shear connection net section match attribute bolted connection |
| 基金项目:国家自然科学基金项目(51308454)； 西安理工大学科技新星项目 |
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| 中文摘要: |
| 通过对22个Q690高强钢螺栓连接接头的静力拉伸试验，综合分析了其连接的破坏形态、受力性能和匹配性，讨论了关键参数对承载性能的影响。研究表明：螺栓横向布置时，承载力随螺栓端距、边距和间距的增大呈线性增长；螺栓纵向布置时，连接的承载力仅随边距增大而增大，螺栓端距和间距的影响不超过5%。螺栓孔径对承载力的影响主要体现在净截面面积上，螺栓强度等级会影响连接的初始滑移荷载，而对极限承载力影响较小，与Q690钢材匹配的高强钢螺栓建议取10.9级以上。EC3规范能较好地反映端距和边距的影响关系，但偏于保守，ANSI规范的拟合结果与试验值更接近。上述研究结果可为国产高强度钢材螺栓连接的设计理论和方法提供基础数据。 |
| 英文摘要: |
| Based on static tensile experiment of 22 pieces of Q690 high-strength steel bolted joint, the failure mode, mechanical properties and match attribute of this connection are comprehensively analyzed, and the influence of key parameters on bearing capacity is discussed in this paper. Results show that when bolts are arranged transversely, the bearing capacity increases linearly with the increase of bolt end distance, edge distance and spacing between bolts; and when the bolts are arranged longitudinally, the bearing capacity of the connection increases only with the increase of edge distance, and the effect of the bolt end distance and spacing is not more than 5%, respectively. The influence of bolt bore diameter on bearing capacity is mainly reflected in the net section area. The grade of bolt strength affects the initial slip load of the connection, but has little effect on the ultimate bearing capacity. So, the grade of high-strength bolt matching Q690 steel is recommended more than 10.9 levels. Meanwhile, EC3 specification can better reflect the relation between the end distance and the edge distance, but it is conservative. The fitting result of the ANSI specification is closer to experimental values. Thus, above results can provide basic data for the design theory and method of home-made high strength steel bolt connection made in China. |
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