平板贯穿裂纹高强螺栓止裂加固试验研究
引用文献：
王贤强 杨羿 刘朵 张建东 陈春霖. 平板贯穿裂纹高强螺栓止裂加固试验研究[J]. 建筑结构，2022，48（03）：104-109.
WANG Xianqiang YANG Yi LIU Duo ZHANG Jiong CHEN Chunlin. Experimental research on crack prevention and reinforcement with high-strength bolts for flat plate through cracks[J]. Building Structure，2022,48（03）：104-109.
摘要：为了验证高强螺栓止裂对平板贯穿型疲劳裂纹的加固效果，基于有限元模拟探究了高强螺栓止裂加固机理，通过单边裂纹钢板和横隔板足尺模型疲劳试验，验证了高强螺栓止裂加固的有效性，定量比较了高强螺栓规格对修复后钢板疲劳寿命的影响。试验结果表明：单边裂纹钢板高强螺栓止裂加固后的疲劳寿命是传统止裂孔加固的近5倍，螺栓规格(螺栓直径、强度等级)对加固效果影响显著，单边裂纹钢板用10.9级M14高强螺栓止裂的疲劳寿命是8.8级M12高强螺栓的3倍以上。横隔板足尺模型高强螺栓止裂加固后疲劳寿命达到200万次以上，满足规范疲劳强度等级要求。单边裂纹钢板和横隔板足尺模型疲劳试验中，高强螺栓止裂后构件均表现出优异的抗疲劳性能。
关键词：平板贯穿型疲劳裂纹，高强螺栓，止裂加固，正交异性钢桥面板，维修加固，疲劳寿命
基金：中国博士后基金面上项目(2018M642300)；江苏省博士后科研资助计划项目(2018K136C)；江苏省交通运输科技项目(2018Y11,2019Y69-02)。
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[18] 姜旭，吕志林，强旭红，等.高强螺栓止裂法修复含裂纹钢板疲劳受力性能[J].同济大学学报(自然科学版),2021,49(4):476-486.
[19] 金属材料疲劳试验疲劳裂纹扩展方法：GB/T 6398—2017[S].北京：中国标准出版社，2017.
[20] 公路钢结构桥梁设计规范：JTG D64—2015[S].北京：人民交通出版社，2015.
[2] 陈开利.正交异性钢桥面板的疲劳裂纹处治[J].世界桥梁，2016,44(1):70-76.
[3] 姚悦，傅中秋，王益逊，等.弯曲荷载作用下平板贯穿裂纹钻孔止裂试验研究[J].建筑钢结构进展，2019,21(4):54-60.
[4] YUANZHOU Z Y,JI B H,FU Z Q,et al.Fatigue crack retrofitting by closing crack surface[J].International Journal of Fatigue,2019,119:229-237.
[5] MOHAJER M,BOCCIARELLI M,COLOMBI P,et al.Irreversible cyclic cohesive zone model for prediction of mode I fatigue crack growth in CFRP-strengthened steel plates[J].Theoretical and Applied Fracture Mechanics,2020,110:102804.
[6] 李传习，柯璐，陈卓异，等.正交异性钢桥面板弧形切口及其CFRP补强的疲劳性能[J].中国公路学报，2021,34(5):63-75.
[7] 王春生，翟慕赛，HOUANKPO T N O,等.正交异性钢桥面板冷维护技术及评价方法[J].中国公路学报，2016,29(8):50-58.
[8] 卜一之，金通，李俊，等.纵肋与横隔板交叉构造细节穿透型疲劳裂纹扩展特性及其加固方法研究[J].工程力学，2019,36(6):211-218.
[9] FU Z Q,JI B H,XIE S H,et al.Crack stop holes in steel bridge decks:Drilling method and effects[J].Journal of Central South University,2017,24(10):2372-2381.
[10] JIANG X,LV Z L,QIANG X H,et al.Improvement of stop-hole method on fatigue-cracked steel plates by using high-strength bolts and CFRP strips[J].Advances in Civil Engineering,2021:1-14.
[11] 姚悦，吉伯海，傅中秋，等.钢桥面板钻孔工艺对止裂效果的影响分析[J].广西大学学报(自然科学版),2018,43(1):425-431.
[12] 袁周致远，吉伯海，傅中秋.钢结构疲劳裂纹合理止裂孔形状研究[J].南京理工大学学报，2017,41(5):556-561.
[13] FANNI M,FOUDA N,SHABARA M A N,et al.New crack stop hole shape using structural optimizing technique[J].Ain Shams Engineering Journal,2015,6(3):987-999.
[14] 杜洪增，田秀云，刘海涛.关于铆钉对止裂孔填充作用的研究[J].中国民航学院学报，2005,23(2):1-3.
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Experimental research on crack prevention and reinforcement with high-strength bolts for flat plate through cracks
Abstract: In order to verify the reinforcement effect of high-strength bolts on flat plate through-type fatigue cracks, the mechanism of crack prevention and reinforcement of high-strength bolts was explored based on finite element simulation. The effectiveness of crack prevention and reinforcement with high-strength bolts was verified through the fatigue tests of single-side cracked steel plate and the diaphragm plate full-scale model. The influence of high-strength bolt size on the fatigue life of repaired steel plate was quantitatively compared.The test results show that the fatigue life of single-side cracked steel plate after crack prevention and reinforcement with high-strength bolts is nearly 5 times as much as that of traditional crack prevention hole reinforcement. Bolt specifications(bolt diameter, strength grade) have a significant impact on the reinforcement effect. The fatigue life of single-side crack steel plate repaired by 10.9 grade M14 high-strength bolt is more than 3 times of that repaired by 8.8 grade M12 high-strength bolt. The fatigue life of transverse diaphragm full-scale model after crack prevention and reinforcement with high-strength bolts reaches more than 2 million times, which meets the requirements of fatigue strength level in the specification. In the fatigue test of the single-sided cracked steel plate and diaphragm plate full-scale model, the components after the crack prevention with high-strength bolts all showed excellent fatigue resistance.
Keywords: flat plate through-type fatigue crack; high-strength bolt; crack prevention and reinforcement; orthotropic steel bridge deck; maintenance and reinforcement; fatigue life
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