摘要
为明确波形钢腹板工字钢-混凝土结合板梁桥关键设计参数的合理取值范围,以3×30 m波形钢腹板结合梁桥通用图为研究对象,建立波形钢腹板工字钢-混凝土结合板梁有限元模型进行参数敏感性分析。研究翼缘板宽厚比、波形钢腹板高厚比、横隔板间距及钢梁高跨比等对结构受力性能的影响,并给出关键设计参数合理取值建议。结果表明:波形钢腹板工字钢梁跨中处受压上翼缘板宽厚比小于23、支点处下翼缘板宽厚比小于19时可满足结构稳定性要求;跨中处波形钢腹板高厚比不宜大于265,支点处腹板厚度由抗剪需求控制;波形钢腹板横向刚度大于平钢板,横隔板间距可放宽至支点处翼缘板宽度的35倍;波形钢腹板工字钢结合板梁桥的钢梁高跨比可取1/28~1/18,经济合理高跨比约为1/25。
The study focuses on the rational ranges of key design parameters of the composite girder bridge with I steel girders,concrete slabs and corrugated steel webs.The standard drawings of the composite girder bridge with corrugated steel webs and three spans of 30 m are referenced.A finite element model was developed for parametric sensitivity analysis.The influences of multiple parameters,including width-to-thickness ratio of flange,depth-to-thickness ratio of corrugated steel web,spacing of diaphragms and depth-to-span ratio of I steel girder,on the load bearing behavior of the composite girder bridge with I steel girders,concrete slabs and corrugated steel webs are studied.The rational ranges of key design parameters are given.It is shown that the width-to-thickness ratio of the compression upper flange at the midspan of the I steel girder with corrugated steel webs is less than 23,when the width-to-thickness ratio of the lower flange over supports is less than 19,the structural stability of the bridge can meet the requirements.The height-to-thickness ratio of the corrugated steel webs at midspan should not surpass 265,and the thickness of the webs over supports should be governed by the shear resistant requirements of the structure.By and large,the lateral stiffness of the corrugated steel web is greater than that of the flat steel plate,the maximum spacing of diaphragms can reach 35 times of the width of flange over supports.The depth-to-span ratio of the I steel girder can be set between 1/28 to 1/18,and the most rational and economic choice is 1/25.
作者
查上
邓文琴
刘朵
张建东
ZHA Shang;DENG Wen-qin;LIU Duo;ZHANG Jian-dong(College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China;Jiangsu Transportation Research Institute Co.,Ltd.,Nanjing 211112,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2023年第1期87-93,共7页
Bridge Construction
基金
国家自然科学基金项目(51908282)
江西省交通运输厅科技项目(2022H0019)
山东省交通运输厅科技计划项目(2020B47)。
关键词
钢-混凝土结合板梁桥
波形钢腹板
工字钢梁
设计参数
屈曲稳定
经济性
有限元法
steel-concrete slab composite girder bridge
corrugated steel web
I steel girder
design parameter
buckling stability
economy
finite element method
