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罗奎,冀伟,王秀艳,孔烜,韩振勇.改进型波形钢腹板组合箱梁的挠度分析[J].计算力学学报,2025,42(3):450~455,461

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改进型波形钢腹板组合箱梁的挠度分析

Deflection analysis of an improved composite box girder with corrugated steel webs

投稿时间：2023-12-22 修订日期：2024-03-13

DOI：10.7511/jslx20231222001

中文关键词: 组合箱梁波形钢腹板单元刚度矩阵挠度计算参数分析

英文关键词:composite box girder corrugated steel web element stiffness matrix deflection calculation parametric analysis

基金项目:国家自然科学基金(52008160;52168019); 中央高校基本科研业务费(541109030099); 甘肃省重点研发计划-工业类项目(23YFGA0043); 中建股份科技研发项目(CSCEC-2021-Z-10)资助.

作者	单位	E-mail
罗奎	南京航空航天大学土木与机场工程系, 南京 211106 湖南大学土木工程学院, 长沙 410082
冀伟	湖南大学土木工程学院, 长沙 410082
王秀艳	中国建筑第六工程局有限公司, 天津 300171 天津大学建筑工程学院, 天津 300350	37696643@qq.com
孔烜	湖南大学土木工程学院, 长沙 410082
韩振勇	中国建筑第六工程局有限公司, 天津 300171 天津城建设计院有限公司, 天津 300122

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中文摘要:

为了精确分析改进型波形钢腹板组合箱梁(ICBGCSW)的挠度,利用有限梁段法对ICBGCSW的挠度进行了研究。首先,考虑波形钢腹板(CSW)的剪切变形和箱梁的剪力滞效应,利用势能驻值原理推导出ICBGCSW的单元刚度矩阵。随后,根据单元刚度矩阵开发了ICBGCSW的挠度分析程序,并通过室内模型试验梁挠度的有限元结果和实测结果对程序的正确性和适用性进行验证。最后,对ICBGCSW的挠度影响因素进行了研究。结果表明,利用挠度分析程序获取的挠度值与实测值和有限元值吻合较好,误差在2%以内。当高跨比小于0.069时,CSW和钢底板的厚度对挠度的影响较大;当高跨比大于0.069时,CSW和钢底板的厚度对挠度的影响可以忽略不计。本文开发的挠度分析程序使用简单,只需ICBGCSW的截面信息和材料属性即可快速获取挠度值。研究成果可为ICBGCSW的挠度分析提供一种简化分析方法。

英文摘要:

In order to accurately analyze the deflection of an improved composite box girder with a corrugated steel web(ICBGCSW),the deflection of the ICBGCSW is investigated using the finite beam segment method.First,the element stiffness matrix of ICBGCSW is derived using the principle of stationary potential energy by considering the shear deformation of the corrugated steel web(CSW)and the shear lag effect of the box girder.Furthermore,the deflection analysis program of ICBGCSW is developed based on the element stiffness matrix,and the accuracy and applicability of the proposed method is verified against the measured and finite element values of the deflection of the model test beam.Finally,the factors affecting the deflection of ICBGCSW are investigated.The results show that the deflection values obtained using the deflection analysis program are well matched with the measured and finite element values,and the error is within 2%.When the height-span ratio is less than 0.069,the thickness of the CSW and steel bottom plate has a greater effect on the deflection.When the height-span ratio is greater than 0.069,the effect of the thickness of CSW and steel bottom plate on deflection can be ignored.The deflection analysis program developed in this paper is simple to use,and the deflection values can be obtained by simply substituting the cross-section information and material properties of ICBGCSW into the program.The research results can provide a simplified analysis method for the deflection analysis of ICBGCSW.

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