近年來國內高樓建築採用鋼骨鋼筋混凝土(SRC)構造者日漸增多，SRC 設計較鋼結構具更大之勁度，可減低其設計載重下之位移，其亦較RC 結構具更佳之韌性，因此SRC 應用於耐震設計有其價值，一般而言，SRC 之造價較上述二者為高，然若計入其承載效能（如抗壓強度、抗彎強度及韌性），則SRC 仍具競爭力，由於SRC 結構因RC 部分之故，自重仍大，欲提升其效能及競爭力，其具體可行方法可為應用高強度混凝土製作以鋼管與外包覆RC 之中空鋼骨鋼筋混凝土，緣此，本計畫擬自95 年8 月起以三年時間，針對應用高強度混凝土之中空式鋼骨鋼筋混凝土構材耐震行為進行探討。第一年針對構材在扭矩及單向彎矩組合載重下之耐震性能進行評估，以一系列不同斷面尺度(混凝土厚度，深度/寬度比)及不同載重組合(扭矩/彎矩比)之反覆載重試驗資訊，建立高強度中空鋼骨鋼筋混凝土構材耐震行為相關分析模式及工程應用資訊。第二年針對其破壞模式進行探討，檢討相關設計於扭矩及其組合載重下效能提昇之可行性，研擬適當之細部設計改善措施，並以反覆載重試驗驗證之，藉以提昇此構材之扭轉撓曲承載效能，此部分研究目前正順利進行中。第三年則針對構材在扭矩及雙向彎矩組合載重下之耐震性能進行探討，除由試驗資訊推求適當之分析及設計參數外，同時整合研究全程所獲成果，提出高強度鋼骨鋼筋混凝土構材設計建議，以供設計分析參考。 ; Steel reinforced concrete has been widely used in building construction. The structural behavior of steel reinforced members is dependent upon the effective integration of structural steel and the reinforced concrete. In order to perform well in an earthquake, the SRC designs must possess sufficient ductility. Application of high strength concrete to construction has become more popular during recent decades. Such designs are considered to be more economical and competitive compared with traditional concrete structures, because the composite members with less unit weight behave better when they are subjected to earthquake. This study is focused on the evaluation and improvement of seismic performance of high strength hollow steel reinforced concrete members subjected to combined torsion and bi-axial bending. A series of combined loading tests involving torsion will be conducted to investigate the member behavior. Experimental information will be used to qualitatively and quantitatively evaluate the member performance under earthquake. Relationship among member performance, concrete strength and sectional compositions will be defined so that design references can be established. Finally, a hysteretic model accounting for member strength and deformation will be proposed for member behavior prediction. ; 研究期間 9708 ~ 9807
