CAJ | 학술논문

平面曲线梁桥尤其是独柱支撑的曲线梁桥，在永久作用和可变作用下会产生侧向变位。某平面曲线连续梁桥，中支点双向活动支座处主梁侧向位移接近支座使用极限值，造成柱顶抗震锚栓弯曲变形，甚至屈服。文中通过建模计算桥梁在实际荷载作用下侧向位移，并与实测位移进行对比，分析该桥侧向位移产生的主要原因。结果显示，现况桥梁永久作用变形已基本趋于稳定，实际可变作用引起的侧向弹性位移较小。因此选择适宜的环境温度，在墩柱顶部设置防爬移限位装置，以确保桥梁结构的运营安全。
평면곡선량교우기시독주지탱적곡선량교，재영구작용화가변작용하회산생측향변위。모평면곡선련속량교，중지점쌍향활동지좌처주량측향위이접근지좌사용겁한치，조성주정항진묘전만곡변형，심지굴복。문중통과건모계산교량재실제하재작용하측향위이，병여실측위이진행대비，분석해교측향위이산생적주요원인。결과현시，현황교량영구작용변형이기본추우은정，실제가변작용인기적측향탄성위이교소。인차선택괄의적배경온도，재돈주정부설치방파이한위장치，이학보교량결구적운영안전。
Plane curve beam bridges,especially Single column supported curve beam bridges,under the permanent action and Variable action,will produce a lateral displacement.A flat curve girder bridge located at Beijing's Second Ring Road,girder lateral displacement at the bidirectional movable supports on intermediate fulcrum is close to the bearing limit value,which causes bending deformation of the seismic anchor,even yield.In this paper,a model of the bridge has been built to calculate the lateral displacement under actual load,which has been compared with the measured lateral displace-ment.The permanent deformation of the status bridge has been basically stabilized,Actually,actual variable action will cause smaller lateral elastic displacement.Select the appropriate ambient tempera-ture,set anti-climb stopper at pier top to ensure safe operation of the bridge structure.