下承式空钢管系杆拱桥结构稳定性影响研究  

Study on structural stability influence parameters of underload-bearing empty steel beam arch bridge

作　　者：宋力锋 SONG Li-feng(School of Jinshan,Fujian Agriculture and Forestry,Fuzhou 350002,China)

机构地区：[1]福建农林大学金山学院

出　　处：《哈尔滨商业大学学报（自然科学版）》2020年第1期86-90,96,共6页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：福建省教育厅中青年教师教育科研项目(JAT170892)

摘　　要：为了研究下承式空钢管系杆拱桥结构稳定性,利用有限元软件ANSYS建立了某跨河下承式空钢管拱桥的三维模型,进行实桥运营情况下的结构稳定性研究.并对拱桥模型进行了相关参数分析,量化了宽跨比、横向联系、吊杆损伤对下承式空钢管桁肋系杆拱桥稳定性的影响.从空钢管拱桥屈曲形状和荷载屈曲系数来研究其稳定性,判断出该桥的面内刚度强于面外刚度,易出现面外失稳;研究发现在拱桥其他参数不变时,仅增大该桥的宽跨比会降低其横向刚度,减小拱桥的横向稳定性;可以通过加强横向联系提高此类拱桥的稳定性;而局部吊杆损伤对下承式空钢管系杆拱桥稳定性的影响较小.In order to study the structural stability of the underload-type hollow steel pipe arch bridge,a three-dimensional model of a cross-river hollow steel pipe arch bridge was established by using the finite element software ANSYS. The effects of wide span ratio,lateral connection and boom damage on the stability of the undersupported hollow steel tube truss arch bridge were quantified. The buckling shape and load buckling coefficient of the arch bridge of an empty steel pipe were studied. In addition,it was found that when the other parameters of the arch bridge are constant,only increasing the width span ratio of the bridge will reduce its transverse stiffness and reduce the lateral stability of the arch bridge.The stability of such arch bridges can be improved by strengthening horizontal linkages.However,the effect of partial boom damage on the stability of the underbearing hollow steel pipe arch bridge was small.

关 键 词：空钢管拱桥 稳定性 宽跨比 横向联系 吊杆损伤 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]