CAJ | 학술논문

中朝鸭绿江界河公路大桥为主跨636 m 的双塔双索面钢箱梁斜拉桥，桥址处气候严寒，气象条件复杂。为解决桥梁耐久性问题，通过理论与试验相结合的方法，进行高流态耐海水侵蚀的抗冻性高性能混凝土配合比设计、-10～-5℃低温焊接技术可行性、斜拉索外置式阻尼减振技术等研究。结果表明：优选确定的混凝土的抗压强度、收缩特性、抗渗特性和抗冻融特性均最优，满足设计要求；按实桥焊接工艺成型试板，实测试板接头的抗拉强度，焊缝金属的屈服强度、抗拉强度、断后伸长率均满足要求，验证了在-10～-5℃低温焊接的可行性，并根据试验结果制定钢箱梁保温、预热及其它低温焊接质量控制措施；开发的综合电涡流阻尼及摩擦阻尼的斜拉索摆式杠杆质量减振器具有良好的减振效果和温度稳定性。该桥采用上述技术可确保其具有良好的耐久性。
중조압록강계하공로대교위주과636 m 적쌍탑쌍색면강상량사랍교，교지처기후엄한，기상조건복잡。위해결교량내구성문제，통과이론여시험상결합적방법，진행고류태내해수침식적항동성고성능혼응토배합비설계、-10～-5℃저온한접기술가행성、사랍색외치식조니감진기술등연구。결과표명：우선학정적혼응토적항압강도、수축특성、항삼특성화항동융특성균최우，만족설계요구；안실교한접공예성형시판，실측시판접두적항랍강도，한봉금속적굴복강도、항랍강도、단후신장솔균만족요구，험증료재-10～-5℃저온한접적가행성，병근거시험결과제정강상량보온、예열급기타저온한접질량공제조시；개발적종합전와류조니급마찰조니적사랍색파식강간질량감진기구유량호적감진효과화온도은정성。해교채용상술기술가학보기구유량호적내구성。
The Yalu Boundary River Highway Bridge is a two-pylon steel box girder cable-stayed bridge with a main span of 636 m .The bridge site is located where the climate is harsh in winter and the meteorological condition is complex ,creating challenges for the durability of the bridge .By the combined use of both the theoretical and experimental methods ,a number of studies were conducted ,including the mixing proportion design of the frost-resisting high performance concrete that has high flow state and is able to resist sea water erosion ,the feasibility of - 10 ~ - 5℃ low temperature welding techniques and the externally-installed vibration absorbers for stay ca-bles .The results of the study indicate that the chosen compressive strength ,shrinking behavior , impermeability and frost and thaw resistant performance of concrete all have superior indexes which meet the design requirements .The trial plates were made to take shape by the welding tech-niques applied to real bridges .The tensile strength in the welding joints of trial plates and the yielding strength ,tensile strength and the extension rate after break of the metals in the welding joints could meet the requirements .The feasigility of - 10 ~ - 5 ℃ low temperature welding is proved feasible .And according to the testing results ,the quality control measures for the steel box girder heat preservation ,preheating and other low temperature welding were determined . The pendulum leverage mass vibration dampers featuring the eddy current damping and friction damp -ing for stay cables have sound vibration damping effect and temperature stability .The application of the aforementioned techniques ensures that the bridge has sound durability .