摘要
为研究多尺度建模方法在变截面超宽连续钢箱梁力学分析中的适用性,运用Midas和ABAQUS有限元软件,建立等尺度梁单元模型和梁-壳-实体的多尺度模型。通过对支反力、挠度、弯矩、应力以及细部构造应力等的对比分析,发现基于位移协调的多尺度界面连接方法,可以实现梁单元宏观模型与实体单元的不同尺度间的连接。同时,多尺度模型能够准确预测变截面钢箱梁的受力情况,反映出关键部位的受力变化,计算效率明显提高。因此,多尺度建模方法,在变截面超宽连续钢箱梁力学分析中具有较好的适用性。
To investigate the applicability of multi-scale modelling methods in the mechanical analysis of variable-section ultra-wide continuous steel box girders,Midas and ABAQUS finite element were used to establish their equal-scale beam models and beam-shell-solid multi-scale models respectively,and to compare and analysis the structural reaction force,mid-span deflection,mid-span bending moment,main beam stress value and main beam detail stress value.The results show that the multi-scale interface connection method(MPC)based on displacement coordination can achieve the connection between the macroscopic model of the beam unit and the solid unit at different scales;the analysis results of the scaled beam models of the slideway support reaction force,mid-span deflection and mid-span bending moment of the variable-section steel box girder are consistent with the multi-scale model.The multi-scale model is used to analysis the local stresses at the most unfavorable locations of the variable-section steel box girder,to achieve the overall structural response analysis,and also to highlight the local critical variation patterns and reduce the calculation time.
作者
金国海
樊汝刚
梁鹏
潜英飞
周雄
罗征
JIN Guohai;FAN Rugang;LIANG Peng;QIAN Yingfei;ZHOU Xiong;LUO Zheng(Hangzhou Local Railway Development Company Limited,Hangzhou 310009;China Railway 24th Bureau Group Zhejiang Engineering Company Limited,Hangzhou 310009;Ningbo Institute of Technology,Zhejiang University,Hangzhou 315000)
出处
《福建建筑》
2023年第8期139-143,共5页
Fujian Architecture & Construction
基金
中国铁路上海局集团有限公司科研计划“双线电气化运营铁路区间更换道岔连续钢箱梁关键技术研究”(2022218)。
关键词
钢箱梁
超宽变截面
多尺度模型
ABAQUS
Steel box girder
Ultra-wide variable section
Multiscale model
ABAQUS
