具耐震消能連接板之鋼橋柱耐震性能研究

Research on the seismic resistance of steel bridge piers with energy dissipation plates

陳生金(Sheng-Jin Chen) ； 林南交(Nan-Jiao Lin)

《結構工程》 30卷4期 (2015/12) Pp. 5-40

https://doi.org/10.6849/SE.201512_30(4).0001

摘要

本文介紹一創新之鋼橋柱設計，並探討其在地震下之行為，此創 新之工法可增進鋼橋柱在地震力下可提供良好之耐震性能。在鋼橋柱 之接合處其接合板以標準螺栓連結上下橋柱外，另於接合板設計消能 區，此消能區乃以設置系列之長槽孔，此長槽孔之目的在於降低連接 板之強度，使接合處之長槽孔位置之連結板可先行進入降伏，且因長 槽孔處之螺栓僅為緊貼狀態，避免長槽孔處之連接板可提供拉壓之強 度，且可使連接板進入降伏，可消散地震所輸入之能量。經由一系列 之橋柱反復受力下，證實可有效消散地震所輸入之能量，此新型之鋼 橋柱可達 6.55%變形轉角且強度未衰減。且塑性區已移至接合區，能 量消散則較傳統鋼橋柱高達 2 倍以上。且塑性區可預先選定位置，地震後可快速檢查。若消能區已發揮消能功能，亦可視需要更換消能連接板。

關鍵字

耐震 ； 消能 ； 鋼橋柱

並列摘要

A new type steel bridge column is proposed and examined for its seismic resistance. In this study, an innovated method is proposed for bridge column with enhanced force transmission and energy dissipation for seismic resistance. At the connection of the column, the force transmission is the same as the conventional design method. However in the connection plate, besides the conventional force transmission, part of the connection plate is designed to dissipate the seismic energy. In the designated energy dissipation area, a serial of slot-hole connections are provided. With this arrangement, the joint can provide a mechanism for force transmission and energy dissipation. A series of experimental study is carried out on the new type of bridge column. From this study, it is found that the new type steel column is able to reach seven times of yielding deformation, 6.55% radium of rotation angle, without decay on its strength. The plastic zone is moved to the connection plate. The dissipated energy based on the new method is more than two times as compare with the traditional steel bridge column. The energy dissipation zone can be preselected. After earthquake, it is easier to perform inspection, retrofit, or replace the damaged connection plate if necessary.