計畫資訊 NCREE-R2011001

Project Information / 計畫資訊

Project ID. / 計畫代碼	NCREE-R2011001
主持人	張國鎮
PI	Kuo-Chun Chang
單位	國震中心
Organization	NCREE
計畫名稱	長延時地震下鋼筋混凝土橋柱耐震行為之試驗研究
Project Name	Experimetal study on seismic behavior of RC bridge column under long duration ground motion
Project No. / 計畫編號	06100A1400
Keywords / 關鍵字	長延時地震, RC橋柱, 耐震行為
Begin Date / 計畫啟始	2011/1/1
End Date / 計畫結束	2012/12/31
Abstract / 摘要	本研究目的在於探討依目前耐震設規範所設計的撓曲控制鋼筋混凝土橋柱在長延時地震作用下的耐震行為，進行兩橋柱試體之反覆載重試驗，這兩座試體具有相同之設計參數但分別施載不同之反覆位移歷時，第一座試體(CLC)採用可以反應長延時地震所引致的多迴圈位移反應歷程進行試驗；第二座試體(COC)則是以各側位移比皆為單迴圈之加載歷程求得橋梁之基線遲滯行為，並與多迴圈歷程反應做比較觀察其差異。試驗結果顯示，兩座試體的最大強度相當，但試體CLC之位移韌性容量較低。在側位移比小於3%時，儘管試體CLC之勁度衰減較為明顯，但兩座試體的遲滯迴圈包絡行為相近；當側位移比大於3%後，試體CLC則開始有較顯著的強度衰減現象。此外，各試體的損傷指標與實際損傷狀態間的關係亦可由試體結果予以建立。
Abstract	This study examined seismic behavior under long duration ground motion in flexural dominated reinforced concrete bridge columns designed per modern seismic design codes. Two column specimens with identical design parameters were tested. The first column (named CLC) was tested using a long duration loading protocol developed to represent the number of response cycles expected under long duration ground motions. The second column (named COC) was tested using a baseline loading protocol with one cycle for each drift loading to obtain baseline behavior for comparison with the behavior of the CLC column. Test results showed that the CLC column had a similar peak strength but a lower ductility capacity compared to the COC column. When drift was 3% or less, the columns showed a similar hysteretic envelop response. However, degradation of stiffness was greater in the CLC column. When drift exceeded 3%, the CLC column started to show greater strength degradation. The relationship between the damage index and damage condition was established.

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Experiments / 實驗清單

實驗代號 Experiment ID	實驗名稱	Experiment Name	地點 Site	設施 Facility	實驗類型 Type	試體材料 Material	說明	Description
CLC	Cyclic loading test of Column CLC	Cyclic loading test of Column CLC	NCREE	Reaction wall & strong floor		RC	The cyclic loading test of Column CLC was conducted using a special loading protocol with number of cycles for each drift level which is representative of those under long duration ground motions (loading duration loading protocol). The loading protocol was applied laterally by using displacement control while the axial loading was applied on the top of column and kept constant using force control during the test.	The cyclic loading test of Column CLC was conducted using a special loading protocol with number of cycles for each drift level which is representative of those under long duration ground motions (loding duration loading protocol). The loading protocol was applied laterally by using displacement control while the axial loading was applied on the top of column and kept constant using force control during the test.
COC	Cyclic loading test of Column COC	Cyclic loading test of Column COC	NCREE	Reaction wall & strong floor		RC	The cyclic loading test of Column COC was conducted using a baseline loading protocol with only one cycle for each drift level to obtain the baseline for comparison with the long duration loading protocol. The loading protocol was applied laterally by using displacement control while the axial loading was applied on the top of column and kept constant using force control during the test.	The cyclic loading test of Column COC was conducted using a baseline loading protocol with only one cycle for each drift level to obtain the baseline for comparison with the long duration loading protocol. The loading protocol was applied laterally by using displacement control while the axial loading was applied on the top of column and kept constant using force control during the test.