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通过对不同表面处理方式的传力杆和对摆放位置存在偏差的传力杆进行拉拔试验,发现不同表面处理方式中喷塑处理可以最大可能性的满足传力杆的设置要求,同时发现传力杆角度的偏差是造成水泥混凝土路面接缝两侧50cm范围内出现裂缝的主要原因;通过弯曲疲劳试验,评价了不同水平安装误差条件下(0°、5°、10°、15°)的接缝传荷能力衰减规律,发现随着传力杆偏差角度的增大,初始接缝传荷能力呈现迅速下降的趋势,并且其整个工作周期内的工作性能发挥也越来越差,当传力杆在水平面内存在不大于5°的角度偏差时,接缝传荷能力可保持在中等水平,对传力杆工作性能不会造成太大影响。最后给出经80万次弯曲疲劳后传力杆的松动量,并提出施工中如何避免传力杆位置偏差的控制措施。
Through the different surface treatment of the dowel bar and the placement of the deviation of the dowel bar pull test and found that the different surface treatment spray process can handle the maximum possible to meet the requirements of dowel bar, while found The deviation of the dowel bar angle is the main reason causing the cracks to occur within 50cm on both sides of the joint of cement concrete pavement. The bending fatigue test is used to evaluate the effect of different installation error (0 °, 5 °, 10 °, 15 °) The results show that with the increase of the deviation angle of the dowel bar, the initial joint load carrying capacity shows a tendency of rapid decline, and its working performance during the entire working cycle also becomes worse and worse. Force transmission rod in the horizontal plane there is no greater than 5 ° angle deviation, the joint transmission capacity can be maintained at a moderate level, the dowel bar performance will not cause much impact. Finally, the amount of looseness of dowel bar after 800000 bending fatigue cycles is given, and the control measures of how to avoid the position deviation of dowel bar during construction are put forward.