Shaking Table Test of the Taiwanese Traditional Dieh-Dou Timber Frame

This article attempts to explore the dynamic behavior of traditional Dieh-Dou timber structure under different combinations of structural forms and vertical loads. Using time-history record (TCU 084) from the Chi-Chi earthquake, two semi full-scale specimens (Symmetric and Asymmetric) were tested. Results showed that the Symmetric specimen tends to be damaged more easily and faster than the Asymmetric one. Damage pattern generally begins from the bottom Dou members and subsequently spreading upwards to the upper Dou, horizontal Gong members, and adjoining Shu members. Friction force between the contact surfaces is crucial towards the maintenance of overall structure. Increase vertical loadings have significant effect on the natural frequencies and global stiffness of the structure. Using the Single-Degree-Of-Freedom (SDOF) system, the derived stiffness is generally in good agreement with the dynamic results of both forms. This study suggests that the effects of increasing vertical loadings should be taken into consideration for future evaluation.     

西方行为地理学的研究历程及最新进展

西方行为地理学诞生于地理学的计量革命浪潮,从个人行为角度理解地理空间及其形成,前后经历了发展、衰退与复兴的历程。近十多年,随着与心理学、GIS、时间地理学等的密切结合,西方行为地理学迎来了全新的阶段,其研究重点转向甘常生活中的行为与环境的互动关系,并在认知和决策两大领域生产了丰硕的研究成果。本文梳理1960年代以来欧美国家行为地理学的研究历程,揭示当前时代背景下的最新研究趋向与特色,以期对我国行为地理学研究给予启示。