摘要
随着沿海地区大规模的桥梁建设,为保证结构安全,大跨连续刚构施工期抗台风构造迫切需要研究。以台州健跳港特大桥为背景,开展了以下四个方面的研究。首先,根据当地100年重现期基本风速,计算得到主梁各梁段及桥墩静风荷载;其次,提出并对比研究了利用挂篮行走孔构建横向劲性骨架支撑和桁架结构支撑两种抗台构造;第三,根据大跨连续刚构主要通过抵抗结构抖振来抗风的特点,研究低阶结构动力响应以判断不同抗台构造的优劣;最后,结合结构静风分析,开展连续刚构抗台期间的结构变形分析。研究结果表明:横向劲性骨架支撑能有效提高结构整体刚度、提高结构低阶频率,可以在风期施工的不利工况下起到有效的加固作用。
With the construction of large-scale bridges along the coast,in order to ensure structural safety,the anti-typhoon structure during the construction of large-span continuous rigid frame is urgently needed.Based on the Taizhou Jiantiao Port Bridge,the following studies were carried out.Firstly,according to the basic wind speed of the local 100-year return period,the static wind loads of the beam sections and piers of the main beam are calculated.Secondly,the lateral steel compositeskeleton support and the truss structure support are constructed by using the hanging basket hanging basket traveling holes.Thirdly,according to the characteristics of large-span continuous steel structures that wind resistance mainly through resisting buffeting,the low-order structural dynamic response is studied to judge the advantages and disadvantages of different anti-typhoon structures.Finally,combined with structural static wind analysis,structural deformation analysis of continuous rigid frame during period anti-typhoon is carried out.The research results show that the lateral steel compositeskeleton support can effectively improve the overall stiffness of the structure and improve the low-order frequency of the structure,which can play an effective strengthening effect under unfavorable working conditions during wind period.
作者
邓崇涛
杨冬平
DENG Chong-tao;YANG Dong-ping(School of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou 310014,China)
出处
《北方交通》
2020年第3期1-4,共4页
Northern Communications
基金
国家自然科学基金项目(51778586)
浙江省交通运输厅科技计划项目(2017003)
浙江省交通运输厅科技计划项目(2018006)。
关键词
抗台构造
MIDAS
静力分析
动力分析
Anti typhoon structure
Midas
Static analysis
Dynamic analysis
