[1]黄 新,贾 烊,李建慧,等.超宽混凝土主梁斜拉桥收缩徐变效应分析[J].西安建筑科技大学学报(自然科学版),2019,51(02):155-0159.[doi:10.15986/j.1006-7930.2019.02.001]
 HUANG Xin,JIA Yang,LI Jianhui,et al.Shrinkage and creep effects analysis of super wide concrete girder cable-stayed bridge[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(02):155-0159.[doi:10.15986/j.1006-7930.2019.02.001]
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超宽混凝土主梁斜拉桥收缩徐变效应分析()
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西安建筑科技大学学报(自然科学版)[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年02期
页码:
155-0159
栏目:
出版日期:
2019-04-28

文章信息/Info

Title:
Shrinkage and creep effects analysis of super wide concrete girder cable-stayed bridge
文章编号:
1006-7930(2019)02-0155-06
作者:
黄 新1贾 烊1李建慧1王 涛2
(1. 南京林业大学 土木工程学院,江苏 南京 210037;2. 南京市政设计研究院有限责任公司,江苏 南京 210008)
Author(s):
HUANG Xin1 JIA Yang1 LI Jianhui1 WANG Tao2
(1. School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2. Nanjing Municipal Design and Research Institute Co., Ltd., Nanjing 210008, China)
关键词:
斜拉桥收缩徐变参数敏感性有限元法灰色关联度
Keywords:
cable-stayed bridge shrinkage and creep sensitivity of parameters finite element method gray correlation degree
分类号:
U448.27
DOI:
10.15986/j.1006-7930.2019.02.001
文献标志码:
A
摘要:
为了研究收缩徐变参数对超宽混凝土主梁斜拉桥的影响,根据工程实际建立全桥空间梁格模型,基于AEMM-FEM法和灰色关联度方法分析收缩徐变参数敏感性。结果表明:收缩徐变参数变化时超宽主梁负弯矩区截面应力与弯矩变化沿横向分布不均,主梁收缩徐变的空间效应显著。提高主梁加载龄期、抗压强度和环境相对湿度均会引起跨中斜拉索的应力松弛现象,加重梁端附近斜拉索的索力负担。由灰色关联度序列可知,主梁加载龄期是影响超宽主梁线形的最敏感因素。
Abstract:
In order to study the influence of shrinkage and creep parameters on the super wide concrete girder cable-stayed bridge, a spatial grillage model of the whole bridge was established according to the engineering practice. Based on AEMM-FEM method and gray correlation degree method, the sensitivity of shrinkage and creep parameters of the bridge was analyzed. The analysis results show that the spatial effect of shrinkage and creep of the super wide girder is significant when the parameters of shrinkage and creep change, because the variation of the section stress and moment of the negative moment area of the girder is unevenly distributed along the lateral direction. Increasing the loading age, compressive strength of the girder and environmental relative humidity will lead to the stress relaxation of the mid-span stay cables. Due to the increase of these parameters, the tensile load of the stay cables near the beam end is aggravated. According to the gray correlation sequence, the loading age of the girder is the most sensitive factor affecting the line shape of the super wide girder.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2018-12-0 修改稿日期:
基金项目:江苏省高等院校自然基金(12KJB560003);高等学校博士学科点专项科研基金(20133204120015)
第一作者: 新(1960-),男,教授,博士生导师,主要从事土木工程领域研究。E-mail: huangxin@njfu.com.cn



更新日期/Last Update: 2019-05-23