台灣位於歐亞大陸板塊與菲律賓海板塊交接處,所以大小地震不斷,為了減小地震造成學校建築的破壞及學校師生的傷亡,並於地震過後提供學校建築作為臨時避難場所,應儘速全面進行學校建築耐震能力評估與必要的補強。但因為全國校舍數量龐大,全面進行耐震能力評估,勢必不符合經濟效益。所以國家地震工程研究中心提出一耐震能力初步評估方法,只需建築結構物基本幾何參數就可估算出大概的耐震能力。本研究以100棟有實際柱細部資料的2樓與3樓校舍模型作為原始研究模組,從原始模組中以統計的方法建立一8棟的模組,再簡易的推估出8棟4樓與5樓的模組,將兩模組共16棟組成新的研究模組,另外再加上不同牆體配置總共304個研究校舍模組。並利用簡化之非線性靜力側推分析來評估,其原理係將破壞樓層內垂直桿件之側力位移曲線進行疊加而計算出整體結構之耐震能力。另外,結構對應之崩塌地表加速度則參考ATC-40所建議之容量震譜方法來估計。將同一模組以國家地震工程研究中心的初步評估方法來分析,比較其結果,並對初步評估的方法提出建議。另ㄧ部份,本研究也利用分析結果提供安全柱量的建議值。
The island of Taiwan is located on the Circum Pacific seismic zone and thus seismicity is extremely active in this country. In order to make sure that all of school buildings can survive during earthquake, then the seismic capacity of buildings must be assessed. There are more than 10,000 school buildings in Taiwan, if every school building go through detailed evaluation method, it’s considered uneconomical. Because of that NCREE provides 3 steps to decide which school building needs to go through detailed evaluation, our research will focus on step two, preliminary seismic evaluation method. In this research three groups of model building based on true school building will be established, and then simplified pushover analysis will be used to find the seismic capacity. In addition to that, NCREE preliminary seismic evaluation method is used to analysis the same model building and comparison between preliminary seismic evaluation method and simplified pushover analysis will be made. After finding out the difference, some suggestion to preliminary seismic evaluation method can be given. This research also recommend a safe ratio of column area.
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