CAJ | 학술논문

龙城大桥采用三跨拱形塔悬索斜拉组合结构,其跨径布置为(72+114+30)m.拱形桥塔由索塔及次塔组成,索塔为变截面拱形钢箱结构;次塔与索塔交角为60°.主梁为箱形结构.利用MIDAS Civil软件进行结构整体分析,在结构重力下主缆的张力约为53 000 kN;根据初始平衡状态,进行倒拆分析,确定缆索的下料长度和空间坐标.主缆采用三段式散索装置锚固;设计新型的钢锚箱,使缆索在小空间内实现较大集中力的锚固.钢索塔采用现场拼装、竖向转体(扳起法)的方法施工.每边吊杆分3组,每组同时张拉4根,以对主缆进行加栽与调位.
룡성대교채용삼과공형탑현색사랍조합결구,기과경포치위(72+114+30)m.공형교탑유색탑급차탑조성,색탑위변절면공형강상결구;차탑여색탑교각위60°.주량위상형결구.이용MIDAS Civil연건진행결구정체분석,재결구중력하주람적장력약위53 000 kN;근거초시평형상태,진행도탁분석,학정람색적하료장도화공간좌표.주람채용삼단식산색장치묘고;설계신형적강묘상,사람색재소공간내실현교대집중력적묘고.강색탑채용현장병장、수향전체(반기법)적방법시공.매변조간분3조,매조동시장랍4근,이대주람진행가재여조위.
The Longcheng Bridge is a three-span hybrid suspension and cable-stayed bridge with arch pylon and with span arrangement(72+114+30)m.The arch pylon is made up of two parts of the cable pylon and the secondary pylon.The cable pylon is a steel box structure with variable cross section and the angle of intersection between the cable pylon and the secondary pylon is 60°.The main girder is also a box structure.By means of the MIDAS/Civil software,the global structure of the Bridge is analyzed and the tensile force of the main cables under the action of the structural gravity is determined to be 53 000 kN.In accordance with the initial equilibrium status,the inverse analysis is made to obtain the setting-out length and the spatial coordinate of the main cables.The anchorage for the cables are used with the three-section splay saddles,the new type of the steel anchor boxes are developed so that the cables can be anchored in a relatively great concentration force way in the narrow space.The arch pylon is assembled at the site and is installed by the vertical rotating method(pulling-up method).The suspenders on each side of the main cables are of three groups and the four suspenders in each group are simultaneously tensioned to the designed value at one time each time in order to apply load to and adjust the main cables.