东南大学学报（自然科学版）Issue(1)：140-144,5.DOI:10.3969/j.issn.1001-0505.2014.01.025
体外预应力对波形钢腹板箱梁自振频率的影响分析
Analysis on effects of externally prestressed tendons on vibration frequency of box girder with corrugated steel webs
摘要
Abstract
In order to research the influence of externally prestressed tendons on the vibration fre-quency of a box girder with corrugated steel webs,the calculation formula for vibration frequency of the box girder with corrugated steel webs is deduced.Based on a 5 .2 m reduced scale experimental box girder model with corrugated steel webs,a finite element model is established by finite element analysis software ANSYS for modal analysis.The datum of dynamic testing,theoretical calculating and finite element analyzing verify the correctness of the proposed formula and the applicability of fi-nite element model.The theoretical calculation and the finite element analysis is combined to re-search the influence of the magnitude of the prestressing force,the anchor position and the size of the cross-sectional area on the vibration frequency of the box girder with corrugated steel webs.The re-sults show that all mentioned factors have little influence on the vibration frequency of the box girder with corrugated steel webs.And in the practical engineering,the influence of externally prestressed tendons on dynamic characteristics of the box girder with corrugated steel webs can be neglected.关键词
波形钢腹板/动力性能/自振频率/模态分析/预应力钢束Key words
corrugated steel webs/dynamic behavior/vibration frequency/model analysis/exter-nally prestressed tendons分类
建筑与水利引用本文复制引用
郑尚敏,马磊,万水..体外预应力对波形钢腹板箱梁自振频率的影响分析[J].东南大学学报（自然科学版）,2014,(1):140-144,5.基金项目
国家自然科学基金资助项目（50078014）、交通运输部科研资助项目（2011-318-775-680）． （）
