浅埋偏压小净距隧道加速度响应规律试验与数值模拟研究

发布时间：2018-03-21 02:24

  本文选题：隧道工程　切入点：小净距隧道　出处：《振动与冲击》2017年17期 　论文类型：期刊论文

【摘要】：为了获得浅埋偏压小净距隧道在地震作用下的加速度响应规律,采用振动台试验与数值模拟相结合的方法,以双向大瑞波(DR-XZ)作为加载波,研究了在不同加速度激振峰值作用下浅埋偏压小净距隧道的加速度响应规律,探讨了非偏压与偏压对浅埋小净距隧道加速度响应的影响。研究结果表明:在双向加载波水平方向上隧道的右半拱加速度响应较为强烈,竖直方向上拱顶与拱脚处加速度响应较为强烈;相对比隧道在加载波的水平方向上加速度响应,竖直方向上隧道加速度响应较为剧烈;地震波的激振方向对隧道加速度响应有较大的影响;隧道测点加速度响应变化趋势受上覆岩层的厚度、中岩柱及岩质边坡等因素影响;振动台试验值与数值模拟值之间的误差在合理的范围内,且两者变化趋势较为相似,验证了振动台试验的合理性与数值模拟结果的可靠性;相对于偏压隧道,非偏压隧道的加速度响应规律性较强,偏压对隧道加速度响应的影响作用较强。
[Abstract]:In order to obtain the acceleration response law of shallow buried bias small net distance tunnel under earthquake action, the method of shaking table test and numerical simulation is adopted, and the bidirectional large Rayleigh wave (DR-XZ) is used as the loading wave. In this paper, the acceleration response law of the tunnel with shallow bias voltage and small net distance under the action of different acceleration excitation peaks is studied. The effects of non-bias voltage and bias voltage on the acceleration response of shallow buried tunnel with small net distance are discussed. The results show that the acceleration response of the right half arch of the tunnel is relatively strong in the horizontal direction of the bidirectional loading wave. Compared with the acceleration response of the tunnel in the horizontal direction of the loading wave, the acceleration response of the tunnel in the vertical direction is stronger than that of the tunnel in the vertical direction. The direction of excitation of seismic wave has great influence on the acceleration response of tunnel, and the change trend of acceleration response of tunnel measuring point is influenced by the thickness of overlying rock layer, the medium rock column and the rock slope, etc. The error between the shaking table test value and the numerical simulation value is within a reasonable range, and the variation trend of the two values is similar, which verifies the rationality of the shaking table test and the reliability of the numerical simulation results. The acceleration response of the unbiased tunnel is more regular, and the influence of bias voltage on the acceleration response of the tunnel is stronger.
【作者单位】： 中南林业科技大学土木工程与力学学院;中南林业科技大学岩土工程研究所;
【基金】：国家自然科学基金(51204125;51404309)
【分类号】：U456
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本文编号：1641839