Anti-Seismic Ｒesponse Characteristics of Vault in the Double Holes Tunnel Entrance Based on Fractal Theory

doi:10.3969 /j.issn.1674-0696.2013.04.20

Abstract

Abstract: Based on the test data of anti-seismic response of vault in the double holes tunnel entrance，the anti-seismic response characteristics of vault are explored from the perspective of fractal dimension． The results show that: the anti-seismic response of vault in the double holes tunnel entrance does exist fractal phenomenon; the dimension can reflect the uniformity of vault curve of seismic response，and the greater dimension，the more uniform of vault curve is． That is，the anti-seismic effect is not good． The structure of vault in the double holes tunnel entrance has a certain anti-seismic effect on the dynamic response under anti-seismic layers． The vault of the tunnel can still achieve the purpose of monitoring through calculating the size of the fractal dimension after setting up anti-seismic layers．

Key words: fractal dimension, tunnel, vault, anti-seismic response, monitoring

摘要： 以双洞隧道洞口段拱顶抗减震试验数据资料为例，从分形维数的角度出发去分析双洞洞口段隧道拱顶抗震反应的特征。研究表明: 隧道拱顶抗震反应确实存在着分形现象，分形维数的大小可以表征双洞洞口段隧道拱顶地震反应曲线的均匀程度，分维数越大，减震效果越不好; 设减震层对结构的动力响应有一定的减震效果; 在设置减震层后的隧道拱顶仍可以通过计算分形维数大小达到监测的目的

关键词: 分形维数, 隧道, 拱顶, 抗震反应, 监测

CLC Number:

U453

Shu Xiaohong. Anti-Seismic Ｒesponse Characteristics of Vault in the Double Holes Tunnel Entrance Based on Fractal Theory[J]. Journal of Chongqing Jiaotong University(Natural Science), 2013, 32(4): 630-632.

舒小红. 基于分形理论的双洞隧道洞口段拱顶抗震反应特征分析[J]. 重庆交通大学学报（自然科学版）, 2013, 32(4): 630-632.

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