摘要
为提高波形钢腹板的剪切屈曲强度,提出将2种型号的波形钢腹板相互组合形成一种组合波形钢腹板。以1612型组合波形钢腹板作为主要研究对象,将其与1600型和1200型非组合波形钢腹板进行对比,采用ANSYS参数建模方法建立了四边简支的波形钢腹板模型,计算分析了高厚比和长厚比对3种波形钢腹板弹性剪切屈曲性能的影响规律,并对不同组合类型波形钢腹板的剪切屈曲强度变化规律进行了研究。结合1座实际桥梁,分析了组合波形钢腹板的适用性。结果表明:波形钢腹板的剪切屈曲强度均随腹板高厚比和长厚比的增大而减小;当波形钢腹板高度和长度一定,1200型和1600型波形钢腹板的剪切屈曲强度相差较小时,1612型组合波形钢腹板的剪切屈曲强度较大;随着腹板高度增大,1612型组合波形钢腹板的较大剪切屈曲强度厚度区间减小;1612型组合波形钢腹板的较大剪切屈曲强度厚度区间受腹板长度的影响较小;不同型号的组合波形钢腹板均存在较大剪切屈曲强度厚度区间,随着组合波形钢腹板由大型号转变为小型号,组合波形钢腹板的较大剪切屈曲强度厚度减小;与波形钢腹板组合梁桥一节段波形钢腹板实际对比发现,1612型变截面与等截面组合波形钢腹板的剪切屈曲强度均大于1200型和1600型波形钢腹板。所得结论可为组合波形钢腹板的抗剪设计提供参考。
In order to improve the shear buckling strength of corrugated steel webs, it is proposed to combine the 2 types of corrugated steel webs to form a composite corrugated steel web. Taking 1612 type composite corrugated steel web as the main research object, which is compared with 1600 type and 1200 type non-composite corrugated steel webs. A model of simple supported corrugated steel webs with 4 edges is established by using ANSYS parametric modeling method, the influence rules of height-thickness ratio and length-thickness ratio on the elastic shear buckling performance of the 3 types of corrugated steel webs are calculated and analyzed, and the change rules of shear buckling strength of different composite types of corrugated steel webs are studied. Combining with a practical bridge, the applicability of composite corrugated steel webs is analyzed. The result shows that(1) The shear buckling strength of corrugated steel webs decreases with the increase of height-thickness ratio and length-thickness ratio of webs.(2) When the height and length of corrugated steel webs are fixed and the difference of shear buckling strengths of 1200 type and 1600 type corrugated steel webs is small, the shear buckling strength of 1612 type composite corrugated steel webs is large.(3) With the increase of web height, the thickness range of large shear buckling strength of 1612 type composite corrugated steel web decreases.(4) The thickness range of large shear buckling strength of 1612 type composite corrugated steel webs is less affected by the web length.(5) There is a large shear buckling strength thickness range in different types of composite corrugated steel webs. With the type of composite corrugated steel webs changing from large to small, the thickness of larger shear buckling strength of composite corrugated steel webs decreases.(6)In the actual comparison with the corrugated steel webs in the first segment of composite girder bridge with corrugated steel webs, the shear buckling strength of corrugated steel webs with comb
作者
郑尚敏
沈强
程海根
唐维胜
管冲
ZHENG Shang-min;SHEN Qiang;CHENG Hai-gen;TANG Wei-sheng;GUAN Chong(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang Jiangxi 330013,China;State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang Jiangxi 330013,China)
出处
《公路交通科技》
CAS
CSCD
北大核心
2023年第1期92-97,151,共7页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(52068025,51968024)
江西省研究生创新资金项目(YC2021-S438)。
关键词
桥梁工程
弹性剪切屈曲强度
有限元分析
组合波形钢腹板
波形钢腹板
bridge engineering
elastic shear buckling strength
finite element analysis
composite corrugated steel web
corrugated steel web(CSW)
