[1]周臻,郭从明,王立云,等.带滑动索预应力鱼腹梁的免迭代分析方法[J].东南大学学报(自然科学版),2019,49(1):34-39.[doi:10.3969/j.issn.1001-0505.2019.01.005]
 Zhou Zhen,Guo Congming,Wang Liyun,et al.Iteration avoiding analysis method for innovative pre-stressed support with gliding cable[J].Journal of Southeast University (Natural Science Edition),2019,49(1):34-39.[doi:10.3969/j.issn.1001-0505.2019.01.005]
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带滑动索预应力鱼腹梁的免迭代分析方法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
49
期数:
2019年第1期
页码:
34-39
栏目:
土木工程
出版日期:
2019-01-20

文章信息/Info

Title:
Iteration avoiding analysis method for innovative pre-stressed support with gliding cable
作者:
周臻1郭从明1王立云2张庆方1
1东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096; 2江苏省第二建筑设计研究院有限责任公司, 南京 210009
Author(s):
Zhou Zhen1 Guo Congming1 Wang Liyun2 Zhang Qingfang1
1Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
2Jiangsu Provincial Second Architectural Design and Research Institute Co., Ltd., Nanjing 210009, China
关键词:
滑动索 免迭代 冷冻升温法 预应力鱼腹梁 基坑支护
Keywords:
gliding cable iteration avoiding frozen heated method innovative pre-stressed support foundation pit support
分类号:
TU394
DOI:
10.3969/j.issn.1001-0505.2019.01.005
摘要:
为了改善预应力鱼腹梁中滑动索效应的模拟精度和降低拉索的建模难度,提出了一种免迭代分析方法.联立滑动索变形协调方程、材料本构方程和拉力平衡方程推导了免迭代法中虚拟温度的表达式,给出了修正虚拟温度值的免迭代系数和补偿预应力损失的预应力补偿系数及其求解式,总结了免迭代法求解预应力鱼腹梁问题的计算流程,并结合算例分析了索力误差的影响因素.结果表明,冷冻升温法与免迭代法都能准确模拟拉索滑动现象且结果基本一致,但后者无需迭代.将免迭代法运用于某工程中的预应力鱼腹梁,索力相对目标值的最大误差为1.5%,相对均值的最大误差为0.3%.免迭代法用于模拟预应力鱼腹梁时具有精度高、免迭代与操作简单的优势.
Abstract:
In order to improve the simulation accuracy of the gliding cable effect in the innovative pre-stressed support(IPS)and reduce the modeling difficulty of cable, an iteration avoiding analysis method(IAM)was proposed. The expression of the virtual temperature in IAM was derived by the deformation coordination, the material constitutive and the tension balance equation of the gliding cable. The iterative avoiding coefficient for the modifying virtual temperature value and the pre-stress compensation coefficient for compensating the pre-stress loss were given. The calculation process of IAM for solving the problem of IPS was summarized. The influencing factors of the cable force error were analyzed with examples. The results show that the phenomenon of gliding of cable can be accurately simulated by using the frozen heated method and IAM, and the results are basically the same, but the latter does not need to be iterated. As for an IPS in a project simulated by IAM, the maximum relative error between the cable force and the target is 1.5%, and the maximum error relative to the mean value is 0.3%. IAM has advantages of high precision, iteration avoiding and simple operation for the simulation of IPS.

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备注/Memo

备注/Memo:
收稿日期: 2018-06-15.
作者简介: 周臻(1981—),男,博士,教授,博士生导师,seuhj@163.com.
基金项目: 国家自然科学基金资助项目(51208095)、江苏省人民防空科研资助项目(2017009).
引用本文: 周臻,郭从明,王立云,等.带滑动索预应力鱼腹梁的免迭代分析方法[J].东南大学学报(自然科学版),2019,49(1):34-39. DOI:10.3969/j.issn.1001-0505.2019.01.005.
更新日期/Last Update: 2019-01-20