七十年代末期,民間財團法人樂山文教基金會結合專家學者聯合發起的「我愛迪化街」保存活動,讓大稻埕歷史建築保存受到政府重視,並於2000年起訂為特定開發區。由於迪化街街屋建築長期受到自然災害、人為破壞,以及年久失修使得該區傳統街屋耐震能力不足,需要進行結構補強。本研究整合三年來研究成果,製作不同棟數及不同樓層數的鄰房與構造材料補強前後地震反應與耐震能力索引表,提供業者進行結構補強與經費之參考。
本研究將相關研究之數據整合統計後,進行分析與分類,可得知鄰房棟數共有1~6連棟六種組合、鄰房樓層數共有1~3層三種組合、土石磚牆等三種建築物材料、單棟以 H型鋼構架、遲滯阻尼消能元件、斜撐、翼牆補強等補強方法;二連棟以 H型鋼構架、遲滯阻尼消能元件等補強方法;三連棟至六連棟以 H型鋼構架補強方法、分析五項地震反應參數(模態週期、底層剪力、頂層位移、層間相對側向位移角、頂層加速度),並評估建築物耐震能力;最後,評估建築物補強所需經費,希冀作為日後業者採取補強決策之參考。
補強效果經由本研究結果得知:
一、以 H型鋼構架、遲滯阻尼消能元件、斜撐、翼牆補強:
建築物形式為單棟時,以遲滯阻尼消能元件全補強效益最顯著
二、以 H型鋼構架、遲滯阻尼消能元件補強:
建築物形式為二連棟時,以遲滯阻尼消能元件側棟補強效益最顯著
三、以 H型鋼構架補強:
建築物形式為三連棟時,以H型鋼構架側棟補強位移可降低48%
建築物形式為四連棟時,以H型鋼構架側棟補強位移可降低47%
建築物形式為五連棟時,以H型鋼構架中央棟補強位移可降低25%
建築物形式為六連棟時,以H型鋼構架中央棟補強位移可降低20%
The street house in Di-Hwa Street of Taipei city needs structure retrofit because destruction by natural disasters and improper use of man-made let the seismic resistance ability not enough. In this study we proposed more results and recommendations by analysis in different materials and different retrofit methods of two-stories-single-building.
This research concentrated in single and 2 to 6 attached house; 1 to 3 stories; three types of construction material are Soil Brick、 Stone Brick and Clay Brick wall, implemented with H-shape steel frame、viscous damper、steel bracing、concrete wing wall for structural strengthening,to get five types of seismic response(vibration period、story shear force、roof displacement、drift angle、acceleration) and seismic resistant ability which compilation of relevant research data into reference design chart.
The result suggest that attention to the control of displacement on seismic resistant and the best retrofit method for single building is implemented viscous damper、for 2 attached house is implemented viscous damper,but for 3〜6 attached house, we only compare with original and H-shape steel frame,the displacement reduce 20%〜48% by H-shape steel frame retrofit methods.