[1]李杰,周亚鹏,陈淮.体外束对波形钢腹板简支箱梁自振频率的影响[J].深圳大学学报理工版,2018,35(4):383-388.[doi:10.3724/SP.J.1249.2018.04383]
 LI Jie,ZHOU Yapeng,and CHEN Huai.Influence of external strand on vibration of simply supported box girder with corrugated steel webs[J].Journal of Shenzhen University Science and Engineering,2018,35(4):383-388.[doi:10.3724/SP.J.1249.2018.04383]
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体外束对波形钢腹板简支箱梁自振频率的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第4期
页码:
383-388
栏目:
土木建筑工程
出版日期:
2018-07-10

文章信息/Info

Title:
Influence of external strand on vibration of simply supported box girder with corrugated steel webs
作者:
李杰周亚鹏陈淮
郑州大学土木工程学院,河南郑州 450001
Author(s):
LI Jie ZHOU Yapeng and CHEN Huai
School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan Province, P.R.China
关键词:
桥梁工程体外束波形钢腹板组合箱梁简支梁自振频率影响分析
Keywords:
bridge engineering external strand composite box girder with corrugated steel webs simply supported beam vibration frequency analysis influence
分类号:
U 442.5
DOI:
10.3724/SP.J.1249.2018.04383
文献标志码:
A
摘要:
为明确体外束张拉对波形钢腹板简支箱梁自振频率的影响,基于弯曲振动微分方程,推导了自振频率解析公式,参考模型试验梁,考虑预应力张拉和复杂应力状态下的弹性模量修正,采用数值方法分析结构自振频率.分析表明,预应力张拉产生“应力软化”效应,引起结构刚度降低,波形钢腹板组合箱梁结构的频率降低;对于模型试验梁,预应力张拉对结构的刚度影响较小,但体外束预应力使得混凝土处于复杂应力状态,材料的弹性模量与单向应力状态下的弹性模量不同,体外束张拉可使波形钢腹板简支箱梁自振频率增大.
Abstract:
For a simply supported composite box girder with corrugated steel webs, in order to determine the effect of external strand on its natural vibration frequencies, analytical formula of the vibration frequency is derived based on differential equation of flexural vibration of simply supported beam under external strand. Considering the effect of prestressed tension and revision of the elastic modulus under the state of concrete complex stress, numerical method is used to analyze the natural frequency of the test beam. The result indicates that prestressed tension has a stress softening effect on the decrease of the stiffness of the structure. Therefore, the vibration frequency is reduced. For the test beam, prestressed tension has little influence on the stiffness. Though the influence of prestressed tension on the vibration frequency is little, the elasticity modulus in this complex stress state is different from that in the uniaxial stress state, the external strand will increase the natural frequency.

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更新日期/Last Update: 2018-06-20