Earthquake dameage prediction of wooden houses in Oska basin subjected to strong ground motions obtained with the consideration of the source characteristics

本课题的研究成果概括如下：1.根据大阪北部地区岩石场地记录的加速度记录，估算了大阪北部地区的强地面运动和地面条件特征。利用随机放大技术3产生了SH波在地面上的强烈地面运动。将Riccati方法引入不规则边界冲积河谷的地震反应分析中，估算了SH波的地面运动。随机输入地面运动模型是使用参数显示的，这些参数规定了基于记录的地面运动的非平稳过程5。利用典型的强震记录，研究了木结构房屋恢复力模型与震害模式之间的关系。分析了具有恢复力特性的木结构房屋的地震反应特性，该房屋具有滞回和滑移两种类型，柱子的顶部和底部都设置了非线性转动弹簧。明确了基于墙体比的木屋水平刚度与非结构因素的刚度之间的关系，并可估算房屋的总刚度。在采用Maxwell型非线性粘滞阻尼器的情况下，对结构体系的最优地震反应控制进行了估计。人们已经认识到，这个系统将能够应用于木制房屋。墙体布置对木结构房屋的扭转振动有影响。良好的墙体布置和控制扭振的设计可以得到基本的数据。结果表明，在不同输入水平的地震动下，木结构房屋的地震反应分析结果可以预测房屋的震害

The research results of this project title are summarized as follows:1. Strong ground motion and ground condition characteristics were estimated based on the recorded accelerograms on the rock site of the Osaka northern area2. Strong ground motions on the surface were generated for SH waves using the stochastic amplification technique3. Ground motions for SH wave were estimated introducing the Riccati method to the seismic response analysis of alluvial valley with irregular boundaries4. The random input ground motion models were shown using the parameters, which prescribe the non-stationary processes on the basis of the recorded ground motions5. The reiationship between the restoring force models and earthquake damage modes of wooden houses was examined using the typicai recorded strong ground motions.6. Earthquake response characteristics were shown of wooden-framed houses with the restoring force characteristics having both hysteretic and slip types and with the non-linear rotational springs at the top and the bottom of the columns7. The relationship between the horizontal stiffiless on the basis of the wall-ratio of the wooden house and the stifihess of the non-structural factor was made clear, and the total stiffiless ofthe house couid be estimated8. Optimum seismic response control of structural systems was, estimated in case of the Maxwell-type non-linear viscous damper. It have been recognized that this system will be able to be applied to wooden houses9. The wall arrangement affects the torsional oscillation of wooden houses. The fundamental data couid be gotten on the good wall arrange and the design to control the tosional oscillation10. It is shown that the earthquake damage will be able to be predicted from the earthquake response analysis results of wooden houses for the various levels ofthe input ground motions