弯-剪-扭复合作用下考虑扭转翘曲的U形薄壁混凝土梁设计方法
许见超1,2郭全全2陈圣刚2,3刁波2班新林1
Design Method of U-shaped Thin-walled Concrete Girders under Combined Effect of Bending-Shear-Torsion Considering Torsional Warping Effect
XU JianchaoGUO QuanquanCHEN ShenggangDIAO BoBAN Xinlin
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作者信息:1.1. 中国铁道科学研究院集团有限公司铁道建筑研究所， 100081， 北京；
2.2. 北京航空航天大学交通科学与工程学院， 100083， 北京；
3.3. 济南大学土木建筑学院， 250022， 济南
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Affiliation:Railway Engineering Research Institute, China Academy of Railway Sciences Co., Ltd., 100081, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.07.009
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中图分类号/CLCN:TU375.102
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栏目/Col:研究报告
摘要:
基于弯-剪-扭复合作用下U形薄壁混凝土梁的试验和数值模拟参数分析研究成果，提出U形梁约束扭转内力翘曲弯矩Mω和翘曲扭矩Tω的等效方法，进而提出弯剪扭复合作用下考虑扭转翘曲的U形薄壁混凝土梁设计方法。对考虑扭转翘曲、不考虑扭转翘曲2种情况下的设计内力和计算极限荷载的结果进行对比分析。结果表明：2种情况下所得到的设计内力在内力类别和数值上均差异显著；当扭弯比较小（约小于1∶8）时，忽略扭转翘曲时得到的极限荷载计算值偏大；当扭弯比较大（约大于1∶8）时，忽略扭转翘曲时得到的极限荷载计算值偏小。
Abstracts:
Based on the experimental and numerical simulation results of U-shaped thin-walled concrete girders under combined actions of bending, shear and torsion, an equivalent method of warping moment Mω and warping torque Tω is proposed, and then a design method of U-shaped thin-walled concrete girders under effect of combined bending-shear-torsion considering torsional warping is proposed. The differences on internal forces and calculated ultimate loads are analyzed between cases of considering and non-considering torsional warping respectively. The results show that there are significant differences both on the types and values of internal forces; when the torque-bending moment ratio is small (about<1∶8), the non-warping calculated ultimate load is relatively larger, and when the torque-bending moment ratio is large (about>1∶8), the nonwarping calculated ultimate load is relatively smaller.
时评 / Commentary
引文 / Ref:
许见超，郭全全，陈圣刚，等.弯-剪-扭复合作用下考虑扭转翘曲的U形薄壁混凝土梁设计方法[J].城市轨道交通研究，2021，24(7):41.
XU Jianchao，GUO Quanquan，CHEN Shenggang，et al.Design method of U-shaped Thin-walled concrete girders under combined effect of Bending-Shear-Torsion considering torsional warping effect[J]. Urban Mass Transit，2021，24( 7 )：41.
XU Jianchao，GUO Quanquan，CHEN Shenggang，et al.Design method of U-shaped Thin-walled concrete girders under combined effect of Bending-Shear-Torsion considering torsional warping effect[J]. Urban Mass Transit，2021，24( 7 )：41.
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