基于改进反应位移法的盾构隧道横向抗震规律研究

发布时间：2018-01-30 11:30

本文关键词： 盾构隧道夹土层弹簧改进反应位移法地震响应理论模型　出处：《震灾防御技术》2017年03期 　论文类型：期刊论文

【摘要】：在地震动作用下,小间距盾构隧道夹土层区域的动力反应影响结构的内力与变形,而反应位移法未考虑夹土层弹簧参数的变化,本文针对这一误差来源,提出了改进反应位移法。一方面在反应位移法合理内容的基础上完善计算模型,另一方面通过数值计算将改进反应位移法与动力时程法进行对比分析,并拟合理论模型对改进的方法进行修正。结果表明,两种算法下结构的地震响应规律一致;间距d≥8m时,结构地震动反应变化不明显,可按反应位移法计算;理论模型提高了改进反应位移法计算结果的精度。
[Abstract]:Under the action of ground motion, the dynamic response of the small spaced shield tunnel affected the internal force and deformation of the structure, but the response displacement method did not take into account the variation of the spring parameters of the soil layer. This paper aims at this error source. The improved reactive displacement method is put forward. On the one hand, on the basis of the reasonable content of the reaction displacement method, the calculation model is improved. On the other hand, the improved response displacement method and the dynamic time-process method are compared and analyzed by numerical calculation. The modified method is modified by fitting the theoretical model. The results show that the seismic response law of the structure under the two algorithms is the same. When the spacing is more than 8 m, the change of structural ground motion response is not obvious, which can be calculated by the reaction displacement method. The theoretical model improves the accuracy of the modified reaction displacement method.
【作者单位】：内蒙古科技大学土木工程学院;中国中铁二院工程集团有限责任公司;
【基金】：内蒙古自治区高等学校科学技术研究项目(NJZY14167)
【分类号】：U452.28;U455.43
【正文快照】： 引言随着社会经济的快速发展,城市化程度的不断提高,城市人口的急剧增加,城市地上空间的开发与利用已接近极限,由此促进了城市地下空间的开发与利用,促进了以地铁盾构隧道为代表的地下结构工程的大规模兴建,下层盾构隧道(简称下层隧道)近距离穿越上层盾构隧道(简称上层隧道)的

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