CAJ | 학술논문

为了研究不同形式中央扣对大跨径自锚式悬索桥地震反应的影响，结合某主跨406 m 的自锚式悬索桥为工程实例，利用 Midas/Civil程序建立其未设中央扣、设置刚性和柔性中央扣的三种有限元模型，使用多重Ritz向量法分别得出三种模型前180阶自振频率及振型，分析对比中央扣对三种模型动力特性的影响。研究表明：中央扣的设置提高了自锚式悬索桥整体刚度；该自锚式悬索桥的竖弯刚度、主塔横向侧弯刚度都明显增大；设置刚性中央扣比柔性中央扣更能提高结构的刚度。
위료연구불동형식중앙구대대과경자묘식현색교지진반응적영향，결합모주과406 m 적자묘식현색교위공정실례，이용 Midas/Civil정서건립기미설중앙구、설치강성화유성중앙구적삼충유한원모형，사용다중Ritz향량법분별득출삼충모형전180계자진빈솔급진형，분석대비중앙구대삼충모형동력특성적영향。연구표명：중앙구적설치제고료자묘식현색교정체강도；해자묘식현색교적수만강도、주탑횡향측만강도도명현증대；설치강성중앙구비유성중앙구경능제고결구적강도。
In order to study the effect of different forms of central buckle on the seismic response of long-span self-anchored suspension bridge,this article took a main cross-406 m of the self-anchored suspension bridge as the engineering example,used the Midas /Civil procedure to establish its three fi-nite element models of not set central buckle、set rigid and flexible central buckle,and used the multiple Ritz vector method to determine three models,first 180 natural frequencies and modes,then analyzed the influences on dynamic characteristics of the three models.The results show that the central buckle can im-prove overall stiffness of the self-anchored suspension bridge;the self-anchored suspension bridge,s verti-cal bending stiffness、lateral bending stiffness of the main tower are significantly increased;setting rigid central buckle is able to increase the stiffness of the structure more effective than flexible central buckle.