[1]胡庆安,李 轲,凤跃森.π型钢板应用于板梁桥加固的非线性研究[J].西安建筑科技大学学报:自然科学版,2014,46(01):16-21.[doi:10.15986/j.1006-7930.2014.01.004]
　HU Qingan,LI Ke,FENG Yuesen.Nonlinear research of -type steel used for plate-beam bridge strengthening[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(01):16-21.[doi:10.15986/j.1006-7930.2014.01.004]
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π型钢板应用于板梁桥加固的非线性研究()
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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:
46
期数:
2014年01期
页码:
16-21
栏目:
出版日期:
2014-02-28

文章信息/Info

Title:
Nonlinear research of -type steel used for plate-beam bridge strengthening
文章编号:
1006-7930(2014)01-0016-06
作者:
胡庆安; 李 轲;  凤跃森
(长安大学公路学院,陕西 西安 710064)
Author(s):
HU Qingan;  LI Ke;  FENG Yuesen
(School of Highway, Chang’an University, Xi’an 710064 ,China)
关键词:
板梁桥; π型钢板; 非线性; 底板开裂; 稳定性; ANSYS
Keywords:
plate-beam bridge;  -type steel;  nonlinear; bottom crack;  stability;  ansys
分类号:
U447
DOI:
10.15986/j.1006-7930.2014.01.004
文献标志码:
A
摘要:
由于超限超载车辆迅速增长，梁底开裂已成为板梁桥营运中的首要病害.以往所使用的粘贴钢板加固，钢材使用率低，加固效果并不理想.根据提高主梁抗弯刚度可减小主梁挠度及内力，并最终抑制梁底开裂的原理，首次提出π型钢板加固法．现利用ANSYS程序进行空间非线性有限元仿真计算.对π型钢板与粘贴钢板加固后主梁进行对比分析，得出π型钢板加固对提高主梁极限承载力、防止主梁底板开裂，效果优于粘贴钢板加固；对比分析使用不同腹板高度与钢板厚度的π型钢板加固后的主梁极限承载力，得出π型钢板腹板高度对提升加固效果的影响较钢板厚度大；进一步对比分析π型钢板应用于不同跨径板梁的稳定性问题，提出不同跨径板梁对π型钢板截面尺寸的具体要求．
Abstract:
Due to the factors of vehicles overloading, cracking on plate beam bottom has become one of the primary problems in plate-beam bridge operations. In sticking steel slab technology, steel products utilization rate is low, so the reinforcement effect is not ideal. According to the principle that the increase of the primary beam flexural stiffness can decrease the maximum vertical deflection and internal forces of the primary beam under the same load, and eventually reduce the beam bottom cracks, the author first proposed the π-type steel strengthening technology. And by utilizing ANSYS program to carry out the space nonlinear finite element simulation calculation, the author compared the effect of primary beam bottom crack prevention by changing π-type steel height and ribbed slab thickness with sticking steel slab technology, Following are the conclusions drawn by the authors: the resisting force and the ability to resist deformation of the plate beam in the limit state of the former case improved a lot more than the latter one, and the effect of improving capacity and preventing primary beam bottom crack is better by using π-type steel technology than sticking steel slab technology. The author also further compared and analyzed the stability problem of π-type steel used for plate beam with different lengths and optimized the π-type steel cross section dimensions.

参考文献/References:

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XIANG Yiqiang. Spatial behavior and strengthening analysis of fabricated PC hollow slab beam bridge with hinge joints[J]. Journal of Southeast University:Natural Science Edition, 2012,42(4):734-738.

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备注/Memo

备注/Memo:
基金项目：国家青年科学基金项目(51308056)
收稿日期：2013-05-27 修改稿日期：2014-02-21
作者简介：胡庆安（1956-），男，教授，硕士生导师，主要从事桥梁结构分析、桥梁抗风及抗震控制研究．E- mail: hqa@gl.chd.edw.cn
更新日期/Last Update: 2015-10-05