港珠澳大桥青州航道桥结构约束体系研究与设计  

Study and Design of Structural Restraint Systems for Qingzhou Ship Channel Bridge of Hong Kong-Zhuhai-Macao Bridge

作　　者：刘明虎[1] 李贞新[1] 李国亮[1] 

机构地区：[1]中交公路规划设计院有限公司,北京100088

出　　处：《桥梁建设》2013年第6期76-81,共6页Bridge Construction

摘　　要：港珠澳大桥青州航道桥为(110+236+458+236+110)m的双塔双索面钢箱梁斜拉桥。针对该桥抗震设防水准高、外边跨未设斜拉索、边跨为钢主梁的建设条件及结构特点,确定了全桥静、动力性能最优目标。根据该目标,对桥梁纵向、横向约束体系进行理论计算及对比分析,最终确定该桥纵向采用阻尼约束体系,在桥塔、辅助墩、过渡墩与主梁之间均设置阻尼约束,在桥塔处设置静力额定刚性限位约束;横向在桥塔、过渡墩与主梁之间设置横向刚性约束,在辅助墩与主梁之间设置阻尼约束。约束体系的功能通过支座、阻尼、限位装置得以实现。在此基础上提出各向约束装置的功能和特殊要求,并确定了技术参数。The Qingzhou Ship Channel Bridge of the Hong Kong-Zhuhai-Macao Bridge is a steel box girder cable-stayed bridge with double pylons, double cable planes and with span ar- rangement （110-t-236＋458＋236＋ 110） m. In consideration of the construction conditions and structural characteristics that the seismic fortification level required for the bridge is high, the stay cables are not to be installed on the outer side spans of the bridge and the main girder for each side span is of the steel girder, the optimal target of static and dynamic performance of the whole bridge is established. In accordance with the target, the longitudinal and transverse re- straint systems for the bridge are theoretically calculated and comparatively analyzed and it is fi- nally determined that the damping restraint systems will be used at the relevant parts in the longi- tudinal direction of the bridge, that is, at the parts of the pylons, auxiliary piers and at the parts between the transition piers and main girder, the damping restraint devices will be set and moreo- ver, at the parts of the pylons, the statically rated rigid limit restraint devices are also set. in the transverse direction of the bridge, at the parts of the pylons and at the parts between the transi- tions piers and main girder, the rigid restraint devices are set while at the parts between the auxil- iary piers and main girder, the damping restraint devices are set. The functions of all restraint systems are to be realized by the bearings, dampers and limit devices. On the basis of setting of the devices, the functions and special requirements for the devices of different directions are formulated and correspondingly the technical parameters of the devices are determined.

关 键 词：斜拉桥 钢梁 箱形梁 约束体系 支座 阻尼装置 限位装置 理论计算 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]