Seismic damage estimation for low‐ and mid‐rise buildings in japan
Seismic damage estimation for low‐ and mid‐rise buildings in japan
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DOI：
10.1002/eqe.4290090202
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发表时间：
1981
影响因子：
4.5
通讯作者：
C. Scawthorn;H. Iemura;Yoshikazu Yamada
中科院分区：
文献类型：
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作者：
C. Scawthorn;H. Iemura;Yoshikazu Yamada
虽然已经花费了大量的努力来分析单个结构，建筑类地震破坏估计，在灾害规划，代码编写，城市规划，国家灾害政策制定等方面的价值，很少被调查。本文主要根据1978年6月12日宫城县大地震（ML = 7.4）中日本仙台市的地震资料，确定了日本城市中低层建筑物的震害估计数。对于低层建筑物，基于超过60，000个建筑物的损坏，发现损坏和倒塌的开始以及损坏成本的损坏比与0.75 s的反应谱最相关。使用已公布的测试数据和平均建筑物的属性，地震损坏模型解释了低层建筑的行为，并允许检查结构变化对估计损坏的影响。根据仙台市189座中层建筑物已公布的自然周期测定结果（地震前和地震后），确定中层建筑物的损伤状态（0：无，4：总）作为最大层位移的函数。结构变化对预期损害的影响也可以估计。有了这两个建筑类的损害估计，很大一部分未来的地震破坏日本城市可以估计，以及各种缓解措施的效果。
While much effort has been spent on analysis of individual structures, building class seismic damage estimators, of value in disaster planning, code-writing, city planning, national hazards policy formulation, etc., have been little investigated. Based largely on data from Sendai City, Japan in the 12 June, 1978 Miyagiken-oki earthquake (ML = 7.4), estimators of seismic damage for low- and mid-rise buildings in urban Japan have been determined. For low-rise buildings, based on damage to over 60,000 buildings, damage ratios for onset of damage and collapse and for cost of damage are found to correlate best with response spectra at 0.75 s. Using published test data and average building properties, a seismic damage model explains the low-rise building behaviour and permits examination of the effect of structural changes on the estimated damage. For mid-rise buildings, damage states (0: none, 4: total) are determined as a function of maximum storey displacement, based on published natural period determinations (pre- and post-earthquake) for 189 mid-rise buildings in Sendai. The effects of structural changes on expected damage can also be estimated. With these two building class damage estimators, a large part of future seismic damage to urban Japan can be estimated, as well as the effects of various mitigation measures.