九寨沟7.0级地震松潘至九寨沟震害特征及分析

Seismic disaster characteristics and analysis of the Jiuzhaigou MS7.0 earthquake from Songpan to Jiuzhaigou

摘要:

对九寨沟7.0级地震松潘至九寨沟各烈度区的房屋结构特点和震害特征进行了分析。该地区新建建筑（尤其是框架结构）抗震性能良好，砖混、砖木等结构整体性较差，地震中损坏普遍。通过计算分析震害指数后发现，框架结构震害指数远小于土木、砖木结构；在Ⅵ度区框架结构震害指数普遍为0，随烈度增加，框架结构的震害指数快速增加，而增加幅度逐渐减小。此外，探讨了缺乏建筑物的地区以及建筑物结构为单一框架结构地区的烈度评定问题并给出了相关的建议，以期对今后的地震现场工作起到参考借鉴作用。

Abstract:

This paper expounded the features of the buildings and analyzed the seismic disaster characteristics of the Jiuzhaigou M_S7.0 earthquake from Songpan to Jiuzhaigou. The new buildings(especially the frame structure)had a good anti-seismic performance in this area. The entirety of the brick-wood structure and the brick-concrete structure were poor, and they were widely damaged in the earthquake. By computing seismic damage index, we found that:the seismic damage index of the frame structure was far less than that of the civil structure and brick-wood structure. The seismic damage index of frame structure was all zero in the Ⅵ area. It was going up rapidly when the intensity increased, but the increasing degree slowed down. Finally, we discussed how to evaluate the intensity in the areas where there were fewer buildings or there was only one structure type, and we offered some advice for future field work reference.