摘要
飞云江跨海特大桥为双塔双索面大跨径钢-混叠合梁斜拉桥,钢梁部分由纵梁、横梁、小纵梁共同组成钢梁格体系,桥面板采用分块预制、现浇湿接缝连接的方式,桥面板设置纵向、横向预应力钢束。全桥共有120根抗拉强度1770MPa平行钢丝斜拉索。约束体系采用半漂浮体系,在索塔设置了竖向支座及横向抗风支座,在辅助墩设置竖向支座,在过渡墩设置竖向支座。为了解新建桥梁结构在动荷载作用下的实际受力状况,评价其在设计使用荷载作用下的工作性能,获得桥梁结构的固有振动特性以及使用阶段的动力性能。对该桥进行了动荷载试验,试验结果表明:该桥的各测试点测试指标基本满足规范要求,承载能力满足设计荷载要求[1]。
The Feiyun River Cross-sea Super Bridge is a double-span double-span long-span steel-mixed composite cable-stayed bridge.The steel beam is composed of longitudinal beams,beams and small longitudinal beams,and the bridge deck is divided into blocks.For prefabricated,cast-in-place wet joints,the deck is provided with longitudinal and transverse prestressed steel bundles.There are 120 tensile steel cable stay cables with a tensile strength of 1770 MPa on the whole bridge.The restraint system adopts a semi-floating system,and a vertical support and a lateral wind-resistant support are arranged in the tower,a vertical support is arranged on the auxiliary pier,and a vertical support is arranged on the transition pier.In order to understand the actual stress state of the new bridge structure under dynamic load,the performance of the bridge under the design load is evaluated,and the natural vibration characteristics of the bridge structure and the dynamic performance of the use phase are obtained.The dynamic load test was carried out on the bridge.The test results show that the test indicators of the test points of the bridge basically meet the requirements of the specification,and the bearing capacity meets the design load requirements.
作者
常有斌
沈伟
CHANG Youbin;SHEN Wei(CCCC Road&Bridge East China Engineering Co.,Ltd.,Shanghai 201203,China)
出处
《施工技术》
CAS
2020年第S01期1250-1252,共3页
Construction Technology
关键词
桥梁工程
斜拉桥
动载试验
承载能力
bridges
cable stayed bridges
dynamic load test
bearing capacity
作者简介
常有斌,工程师,E-mail:357931523@qq.com
