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.根据大坂北方地区岩石场地上记录的加速度记录，估计了强地面运动和地面条件特性2。采用随机放大技术对SH波产生地表强地震动3。将Riccati方法引入到不规则边界的冲积河谷地震反应分析中，估计了SH波的地震动。随机输入地面运动模型使用参数显示，这些参数根据记录的地面运动5规定了非平稳过程。利用典型记录的强地面运动，检验了恢复力模型与木结构房屋震害模式之间的关系.木框架房屋的地震响应特性显示出具有滞回和滑移类型的恢复力特性，并且在柱的顶部和底部具有非线性旋转弹簧7。明确了以木结构房屋的墙率为基础的水平刚度与非结构因素刚度之间的关系，并可估算出房屋的总刚度.在Maxwell型非线性粘滞阻尼器的情况下，估计了结构体系的最优地震反应控制。人们已经认识到，这一制度将能够适用于木制房屋9。墙体布置影响木屋的扭转振动。为控制扭振的合理壁面布置和设计提供了基础数据。结果表明，根据不同水平输入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