大型梁式 U 形渡槽槽身结构动内力分析

华南理工大学学报(自然科学版) ›› 2003, Vol. 31 ›› Issue (9): 82-85,89.

大型梁式 U 形渡槽槽身结构动内力分析

莫海鸿张华忠刘春洋吴轶

华南理工大学建筑学院广东广州510640

出版日期:2003-09-20 发布日期:2022-05-26
作者简介:莫海鸿（1955－）男教授博士生导师主要从事地下构筑物、水工建筑物的设计与施工的研究．

Dynamic Internal Force Analysis of Large U-shaped Beam Aqueduct Structure

Mo Ha-i hong Zhang Hua-zhong Liu Chun-yang Wu Yi

College of Architecture and Civil EngineeringSouth China Univ．of Tech ．Guangzhou510640China

Online:2003-09-20 Published:2022-05-26

摘要/Abstract

摘要： 采用有限元方法对变长度的大型梁式 U 形渡槽进行了模态分析和动力时程分析得出了中长壳与长壳的槽身结构在横向及竖向地震作用下所产生的附加动内力的变化规律．在静力分析时有限元解仅为传统方法解的1／3；在动力分析时横向地震作用下的横向附加动弯矩值是有限元静力解的50％以上．因此当考虑了地震荷载时采用传统方法所得到的内力结果是偏安全的且安全系数至少为2．

关键词: U 形渡槽, 中长壳, 长壳, 动内力

Abstract: Time history response analysis finite element method and modal analysis finite element method are used to analyze large U-shaped beam aqueducts with different lengths in this paper．The earthquake responses of middle long shells and long shells with earthquake waves from transverse direction and vertical direction are studied and the regulations of the additive dynamic internal force were found．In the static analysisthe internal force result by finite element method is just one third of the result by the tratitional method．In the dynamic analysisthe transverse additional dynamic bending moment generated by the transverse earthquake is more than50％ of the static result by finite element method．That means when the dynamic loads are consideredthe internal force result by the traditional method is safe and the safety factor is at least two．

Key words: U-shaped aqueduct；middle long shell；long shell；dynamic internal force

中图分类号:

TV67

莫海鸿张华忠刘春洋吴轶. 大型梁式 U 形渡槽槽身结构动内力分析[J]. 华南理工大学学报(自然科学版), 2003, 31(9): 82-85,89.

Mo Ha-i hong Zhang Hua-zhong Liu Chun-yang Wu Yi. Dynamic Internal Force Analysis of Large U-shaped Beam Aqueduct Structure[J]. Journal of South China University of Technology(Natural Science Edition), 2003, 31(9): 82-85,89.