布达拉宫地震危险性分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 95-104.

论文

布达拉宫地震危险性分析

崔玥，杨娜

作者信息 +

Seismic hazard assessment of Potala Palace

CUI Yue, YANG Na

Author information +

文章历史 +

摘要

布达拉宫是我国著名的世界文化遗产，其所在地区活动断层发育、大地震频发。开展可靠的地震危险性评估，可为该研究区内以布达拉宫为首的藏式古建筑抗震保护提供依据。本文对比传统地震危险性分析方法的不足，采用基于多锁固段破裂理论的地震物理预测方法，提出了地震危险性评估的系统流程。并根据地震烈度和地震动参数衰减关系，考虑场地自身条件，进行了布达拉宫所在区域的地震危险性评估。研究结果表明，该研究区位于林芝地震区，未来100年内该研究区的地震危险性主要为林芝地震区的下一次M8.5主震或M7.8标志性地震；发震断层位于亚东-谷露断层中段附近的纳木错东南岸断裂，震中位置为30.3°N，90.1°E附近；布达拉宫建筑群坐落在基岩，不考虑山体场地放大作用，结构接地端地震作用与基岩相当。研究结论为开展布达拉宫建筑群结构抗震研究提供理论依据。

Abstract

The Potala Palace is a famous world cultural heritage in our country. And its area is located with active faults and frequent major earthquakes. Reliable seismic risk assessment can provide a basis for seismic protection of Zang-style ancient buildings in the study area, including the Potala Palace. Compared with the shortcomings of traditional seismic hazard analysis methods, this paper proposes a systematic process of seismic hazard assessment by using the seismic physical prediction method based on the multi-locking segment rupture theory. According to the relationship between seismic intensity and the attenuation of ground motion parameters, considering the conditions of the site itself, the seismic risk assessment of the area where the Potala Palace is located was carried out. The results show that the study area is located in the Linzhi selsmic zone, and the seismic risk of the study area in the next 100 years is mainly the next M8.5 main shock or M7.8 landmark earthquake in the Linzhi selsmic zone. The seismic fault is located in the southeast bank fault of Namco near the middle section of the Yadong-Gulu fault, and the epicenter is near 30.3°N and 90.1°E. The Potala Palace complex is located in bedrock, regardless of the magnification of the mountain site, and the seismic action at the ground end of the structure is equivalent to that of bedrock. The research conclusion provides a theoretical basis for the seismic study of the structure of the Potala Palace complex.

导出引用

崔玥，杨娜. 布达拉宫地震危险性分析[J]. 振动与冲击, 2024, 43(15): 95-104

CUI Yue, YANG Na. Seismic hazard assessment of Potala Palace[J]. Journal of Vibration and Shock, 2024, 43(15): 95-104

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