1.中国铁塔股份有限公司甘肃省分公司,兰州 730000
2.沈阳飞机设计研究所,沈阳 110066
3.北京石油化工学院 新材料与化工学院,北京 102627
4.大连宇晨高新材料科技有限公司,大连 116023
崔融,男,1980年生,甘肃兰州人,高级工程师;主要研究方向为通信工程;E-mail:876191280@qq.com。
张笑闻(通信作者),男,1993年生,辽宁大连人,博士;主要研究方向为复合材料结构失效分析、多尺度方法;E-mail:zhangxwdut@163.com。
收稿:2025-04-01,
修回:2025-04-29,
纸质出版:2026-03-15
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崔融,高维健,牛荫杰,等. 桁架型高耸结构碳纤维加固的多层级试验研究[J]. 机械强度,2026,48(3):145-151.
CUI Rong,GAO Weijian,NIU Yinjie,et al. Multi-level test study on carbon fiber reinforcement of truss type high-rise structures[J].Journal of Mechanical Strength,2026,48(3):145-151.
崔融,高维健,牛荫杰,等. 桁架型高耸结构碳纤维加固的多层级试验研究[J]. 机械强度,2026,48(3):145-151. DOI: 10.16579/j.issn.1001.9669.2026.03.016.
CUI Rong,GAO Weijian,NIU Yinjie,et al. Multi-level test study on carbon fiber reinforcement of truss type high-rise structures[J].Journal of Mechanical Strength,2026,48(3):145-151. DOI: 10.16579/j.issn.1001.9669.2026.03.016.
目的
2
针对桁架型高耸结构在长期服役中因材料老化、动态荷载及极端环境导致的稳定性劣化问题,系统评估碳纤维加固工艺的增强效应。
方法
2
建立了“材料-部件-整体”多层级试验方法。在材料级测试界面,进行黏接性能及复材板性能的测试;在部件级对加固前、后的L形截面梁及连接节段进行四点弯曲试验,验证局部加固效果;在整体级通过拉力试验对甘肃兰州某25 m高通信塔进行实地测试,分析主承力部件应变与顶端位移。
结果
2
试验结果表明,材料级砂纸打磨使钢/碳纤维粘接剪切强度提升29.98%,优于喷砂和激光处理;部件级加固后L形梁及节点的屈服载荷提升15%以上,局部应变降低65%~75%;整体级主承力部件应变降低28.52%,顶端位移减少15.58%。所提加固工艺显著改善了结构刚度与强度,为工程应用提供了优化依据。
Objective
2
To address the issue of stability degradation in truss type high-rise structures caused by material aging
dynamic loads
and extreme environments
this study systematically evaluates the enhancement effects of carbon fiber reinforcement techniques.
Methods
2
A multi-level test approach encompassing “material-component-structure” was employed. In material-level tests
the bonding shear strength and composite properties were measured. In component-level tests
four-point bending experiments were conducted on L-shaped beams and joints to verify the overall reinforcement effect. Finally
tensile testing was applied to a full-scale 25 m truss structure test to analyze the strain and top displacement of the main load-bearing components.
Results
2
The results demonstrate that sandpaper grinding increases the bonding shear strength by 29.98% at the material level. At the component level
the yield load of reinforced beams improves by over 15%
while local strain decreases by 65% to 75%. At the structural level
the strain in primary components decreases by 28.52% and the top displacement is reduced by 15.58%
indicating significant improvements in structural stiffness and strength.
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