基于竖向支座反力的两跨连续梁桥损伤定位方法

王艺霖, 张平, 安新梅

中国公路学报 ›› 2014, Vol. 27 ›› Issue (4) : 79-84,105.

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中国公路学报 ›› 2014, Vol. 27 ›› Issue (4) : 79-84,105.
桥梁与隧道工程

基于竖向支座反力的两跨连续梁桥损伤定位方法

  • 王艺霖1, 张平2, 安新梅3
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Two-span Continuous Bridge Damage Localization Method Based on Vertical Support Reaction

  • WANG Yi-lin1, ZHANG Ping2, AN Xin-mei3
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文章历史 +

摘要

为了实现连续梁桥主梁的准确损伤定位,通过对两跨连续梁桥进行影响线分析,基于“支座反力影响线二次差值”的概念提出了一个新的损伤定位指标,即竖向支座反力影响线差值指标(DⅡLSR),并基于DⅡLSR建立了相应的损伤定位方法。研究结果表明:对于局部抗弯刚度具有不确定性的实际主梁,可通过对比损伤前后的DⅡLSR数据图形来有效识别损伤位置;损伤定位的效果可通过改变荷载的大小和虚拟区间的长度来调节。

Abstract

To localize the damage to main beams of continuous bridges accurately, a novel damage localization index based on the idea of "second order difference of support reaction influence line" was presented by employing influence line analysis for two-span continuous bridges. This index was called "difference index of influence line for vertical support reaction" (DⅡLSR). Subsequently, the damage localization method based on DⅡLSR was established. The results show that damage position of main beams with uncertain local flexural stiffness can be effectively identified by comparing two DⅡLSR graphs before and after damage. The effect of damage localization can be adjusted by changing the load value and the length of virtual interval.

关键词

桥梁工程 / 连续梁桥 / 影响线分析 / 损伤定位

Key words

bridge engineering / continuous bridge / influence line analysis / damage localization

引用本文

导出引用
王艺霖, 张平, 安新梅. 基于竖向支座反力的两跨连续梁桥损伤定位方法[J]. 中国公路学报, 2014, 27(4): 79-84,105
WANG Yi-lin, ZHANG Ping, AN Xin-mei. Two-span Continuous Bridge Damage Localization Method Based on Vertical Support Reaction[J]. China Journal of Highway and Transport, 2014, 27(4): 79-84,105
中图分类号: U441.4   

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基金

山东建筑大学博士科研基金项目(XNBS1205)
 
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