[1]周勇军,韩智强,赵 煜,等.高墩大跨弯连续刚构桥冲击系数计算公式[J].西安建筑科技大学学报:自然版,2016,48(02):207-213,233.[doi:10.15986/j.1006-7930.2016.02.010]
 ZHOU Yongjun,HAN Zhiqiang,ZHAO Yu,et al.Dynamic load allowance formula of long-span continuous curved rigid frame bridge with high piers[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2016,48(02):207-213,233.[doi:10.15986/j.1006-7930.2016.02.010]
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高墩大跨弯连续刚构桥冲击系数计算公式
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西安建筑科技大学学报:自然版[ISSN:1006-7930/CN:61-1295/TU]

卷:
48
期数:
2016年02期
页码:
207-213,233
栏目:
出版日期:
2016-04-28

文章信息/Info

Title:
Dynamic load allowance formula of long-span continuous curved rigid frame bridge with high piers
文章编号:
1006-7930(2016)02-207-07
作者:
周勇军1韩智强2赵 煜1杨 敏3
1.长安大学公路学院,陕西 西安 710064; 2.太原科技大学交通与物流学院,山西 太原 030024; 3.云南省公路科学技术研究院,云南 昆明 650051
Author(s):
ZHOU Yongjun1 HAN Zhiqiang2 ZHAO Yu1 YANG Ming3
 1. School of highway, Changʹan University, Xiʹan, 710064, China; 2. School of Transportation and Logistic Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, China; 3.Yunnan Science & Technology Research Institute of Highway, Kunming, 650051,China
关键词:
桥梁工程高墩大跨弯连续刚构桥车-桥耦合振动冲击系数路面不平整度
Keywords:
Bridge engineering curved continuous rigid frame bridge vehicles bridge coupled vibration DLA pavement roughness
分类号:
U441.3
DOI:
10.15986/j.1006-7930.2016.02.010
文献标志码:
A
摘要:
为研究高墩大跨弯连续刚构桥冲击系数敏感性因素及计算公式,以陕西某大跨弯连续刚构桥为依托,基于车-桥耦合振动原理,采用三轴五自由度车辆模型,分析了曲率半径、墩高和路面不平整度对桥梁结构最不利断面冲击系数的影响,给出了相应的挠度、弯矩和扭矩冲击系数最大值包络曲线,通过回归分析提出了弯连续刚构桥冲击系数的计算公式,并将计算
结果与国内外规范进行比较.结果表明,对于此类特殊桥梁结构,中国规范冲击系数计算值较其他国家规范值小,在路面等级较差时,各国规范冲击系数计算值均偏于不安全,此时均需考虑不平整度对桥梁冲击系数的影响,研究结果将为该类桥梁冲击系数的精确计算提供参考.
Abstract:
In order to study the sensitive parameters of dynamic load allowance(DLA) for continuous rigid frame bridge with high pier and long-span and its calculation formulas, a rigid frame bridge in Shaanxi province was taken as example. Based on bridge-vehicle coupled vibration principle, the 5DOFs spatial vehicle model was setup, the effect of pier height, superstructure curvature radius and bridge deck roughness on the DLA of bridge structure was studied, and the maximum DLAs for the bending moment, deflection and torture moment were put forward. Then by regression analysis, the DLA formulas of the bridge were given, which were compared with those from other country’s codes. The results show that for this special kind of bridge, the DLA from Chinese code is less than those of foreign countries. When exposed to the worse roads, all the current countries’ codes underestimate the impact factor, so it is considerable that the roughness should be added to the DLA formulas. The results can give reference to computation method of DLA for this kind of bridge.

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备注/Memo

备注/Memo:
收稿日期:2015-07-20 修改稿日期:2016-01-29
基金项目:国家自然科学基金资助项目(51008028);陕西省交通科技基金资助项目(14-26T);云南省交通科技基金资助项目(2011-2B05)
作者简介:周勇军(1978-),男,博士,教授,主要从事桥梁结构动力学方面的研究.E-mail:zyj@chd.edu.cn
更新日期/Last Update: 2016-05-22