| Summary: | 碩士 === 國立成功大學 === 建築學系碩博士班 === 96 === According to the post earthquake investigation, it is found that the damage of Japanese wooden historic buildings is closely related to the seismic strength of mud-plastered walls. In order to improve the seismic resistance of these historic buildings, besides the structural behavior of mud-plastered walls have to be completely understood by the conservation designer, a procedure that can properly evaluate the seismic capability of mud-plastered wall is also required for the designer.
For this purpose, in this study, firstable, the material properties of mud and bamboo are generated from test. Furthermore, in this study, the structural analysis software SAP2000 is adopted to analyze the complete behavior of mud-plastered wall by incline spring model and by rigid frame model. In addition, for practical assessment application of Japanese wooden historic buildings in Taiwan, several variables are adjusted in the assessment method, based on the local conditions. This seismic assessment method was developed in Japan and commonly used in Taiwan.
From test and analysis, followings are observed:
1. For pure mud block, the maximum compression stress is obtained at moisture-containing 20%.
2. The strength of the mud block reinforced with cross bamboo slices gets decreased as the distance between two slices of bamboo is too small, no matter the admixture is added or not.
3. The analysis shows that the relationship between horizontal loading and story drift by rigid frame model has a better agreement with test result than by incline spring model. However, the failure mode by incline spring model is closer to test result than by rigid frame model.
4. According to the horizontal loading-story drift curve of specimen kr_90cm that calculated by rigid frame model, we obtain the strength per meter length Ckr=1.72N/m. As this value is assigned as 1, the strength ratio of mud-plastered wall with width 135cm and 180cm are evaluated as 1.41 and 1.72 respectively. This strength ratio is useful for preliminary seismic assessment of Japanese wooden historic buildings.
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