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基于竖向支座反力的两跨连续梁桥损伤定位方法

Keywords: 桥梁工程,连续梁桥,影响线分析,损伤定位

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Abstract:

?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。

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