带波纹盖板的高效螺栓连接抗滑移系数影响因素试验研究
Experimental Study on the Factors Affecting the Anti-slip Coefficient of Efficient Bolted Connections with Corrugated Cover Plates
为提升高强度螺栓摩擦型连接的连接效率,本文提出了将硬金属波纹板与软金属进行组合的新型高效螺栓连接形式,通过接触面间的犁沟效应和黏着效应,可以显著提高螺栓连接的抗滑移系数。采用理论和试验相结合的研究方法,阐明了该种高效螺栓连接形式的作用机理及影响因素,设计并进行了27个抗滑移系数试验和4个表面硬度测试试验,探究了不同表面处理方式、不同孔型对螺栓连接抗滑移系数的影响,并与理论分析值进行对比。试验结果表明:硬金属和软金属的硬度比是影响高效螺栓连接抗滑移系数的重要因素,连接采用非标准孔将会降低抗滑移系数。所提出的新型高效螺栓连接形式抗滑移系数值最高可达0.89,因而该连接形式能够显著提高高强度螺栓摩擦型连接的抗滑移系数,大大提升单个螺栓的连接工作效率。
In order to improve the connection efficiency of slip-critical high-strength bolt connections, an efficient bolt connection form by combining hard metal corrugated plate with soft metal is proposed,which can significantly improve the anti-slip coefficient of bolted connection through the furrow effect and adhesion effect between contact surfaces. Using a combination of theoretical and experimental research methods,the mechanism and influencing factors of efficient bolted connection form were clarified. A total of 27 anti-slip coefficient tests and 4 surface hardness tests were designed and carried out to investigate the influence of different surface treatments and hole types on the anti-slip coefficient of bolted connection,and the results were compared with the theoretical analysis results. The test results show that the hardness ratio of hard metal and soft metal is an important factor affecting the anti-slip coefficient and the use of non-standard holes will reduce the anti-slip coefficient. The proposed efficient connection form can achieve an anti-slip coefficient value of up to 0.89,which can significantly improve the anti-slip coefficient of high-strength friction-type bolt connection,and greatly improve the efficiency of the connection of individual bolts.
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十四五国家重点研发计划(2023YFC3806603)
国家自然科学基金(52478176)
中国建筑科创平台课题(CSCEC-PT-004-2022-KT-1.1)
中国建筑科创平台课题(CSCEC-PT-004-2022-KT-3.1)
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