CAJ | 학술논문

针对栓钉剪力键用于斜拉桥索塔锚固区连接部位时的应力应变特性，以中部横梁均匀加载为思路，建立局部试验模型，以栓钉剪力键的极限承载力为依据，设计加载方案，通过试验获取栓钉的应变随荷载变化的基本特征，并分析了破坏机理。结果表明：中部加载使模型两侧剪力键受力均匀，设计更为合理；栓钉剪力键的剪应力以加载梁为中心向两侧逐渐降低；高度方向，第7排栓钉受力最大，长度方向，单钉根部受到的剪力最大，应作为控制截面；破坏时，栓钉弯曲变形，根部发生45°剪切破坏，混凝土局部产生裂缝或压碎破坏。
침대전정전력건용우사랍교색탑묘고구련접부위시적응력응변특성，이중부횡량균균가재위사로，건립국부시험모형，이전정전력건적겁한승재력위의거，설계가재방안，통과시험획취전정적응변수하재변화적기본특정，병분석료파배궤리。결과표명：중부가재사모형량측전력건수력균균，설계경위합리；전정전력건적전응력이가재량위중심향량측축점강저；고도방향，제7배전정수력최대，장도방향，단정근부수도적전력최대，응작위공제절면；파배시，전정만곡변형，근부발생45°전절파배，혼응토국부산생렬봉혹압쇄파배。
This article mainly studied the stud shear connector for anchorage zone of pylon cable-stayed bridge connecting parts when subject to stress-strain characteristics.Taking central uniform load for ideas established local test model.Loading program was designed which based on the ultimate bearing ca-pacity of stud shear connector.It has acquired the basic characteristics of stud strain with load variation and analyzed the failure mechanism.The results showed that:The model adopts central loaded design is more reasonable because it makes shear connector force uniform on both sides of the model.The shear stress of stud shear connector decreased gradually from the center to both ends of the load beam.In the height direction,the 7th rows of pegs subject the maximum shear stress.In the longitudinal direction,sin-gle nail roots subject the maximum shear stress.It should be used as the control section.When the stud destruction,the stud bending deformation occurs,peg roots shear failure in direction of 45 °,the partial concrete will produce cracks or be crushed.