摘要
悬臂钢桁-波形钢腹板组合桥梁是一种新型桥梁结构。钢桁-波形钢腹板共同工作,波形钢腹板主要解决纵向抗剪问题,悬臂钢桁主要解决横向抗弯问题。波形钢腹板组合桥梁形成纵向箱形结构,钢管混凝土桁形成横向悬臂结构。施工时两次形成横断面,可以有效减小箱梁横向宽度,方便运输及安装,桁架的上端与悬臂板刚性连接,钢桁的下端与箱梁底板刚性连接,采用抗拔不抗剪栓钉,解决受拉区混凝土抗裂问题,共同形成悬臂钢桁-波形钢腹板组合桥梁结构。对于主桥结构采用Midas/Civil 2010空间有限元分析程序进行分析的结果表明,空间放射性钢管混凝土组合桥墩处于弹性工作状态,主梁第1阶自振频率2.65 Hz,桥梁结构整体刚度好;第1阶屈曲稳定分析特征值为18.18,桥梁结构稳定性好。
Cantilever truss bridge with corrugated steel webs is a new type of bridge structure.Beam-wave interaction and corrugated steel web are mainly to solve the longitudinal shear problem of concrete-filled steel tubular truss.Cantilever mainly solves the problem of lateral bending problem.The bridge with corrugated steel webs forms longitudinal box structure,and concrete-filled steel tubular truss forms horizontal cantilever structure.The two cross sections formed during construction can effectively reduce the transverse width of box girder,and result in convenient transportation and installation.The upper end of the cantilever plate and the bottom of the box girder are fixed to the top and bottom of the truss respectively.The cantilever truss composite bridge with corrugated steel webs is then formed.The main bridge structure was analyzed using Midas / Civil 2010 finite element analysis program.The results show that,the space radiation concrete filled steel tubular piers stay in the elastic state;the first order natural frequency of the main beam is 2.65 Hz;the whole structure has a good rigidity;the first order buckling eigenvalue is 18.18,indicating good structure stability.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2013年第S1期39-44,共6页
Journal of Building Structures
基金
国家自然科学基金项目(50878087)
