現行之傳統型連接板接合鋼橋柱於地震力作用下非彈性變形通常發生在柱底，造成震後檢測及維修之困難，本文將介紹一創新之鋼橋柱設計，利用預選塑性區之概念，使非彈性變形集中於預先選定之區域，震後工程師將針對預選塑性區域進行檢測，以確定是否有破壞發生。
由先前之研究顯示透過此設計能成功將非線性變形控制在預選塑性區位置，並藉由預先選定之消能連接板上進行能量消散，此創新鋼橋柱設計之消散能量能力相較於傳統型鋼橋柱較佳。

It is generally recognized that inelastic deformation of steel bridge column usually emerges at the bottom of the column under seismic load. This usually caused the difficulty in inspecting and repairing the damage after earthquake. In this study, a new type of steel bridge column is proposed which is based on the concept of pre-selected plastic zone. In this design method, the inelastic deformation on the pre-selected zone. After the earthquake, the engineer is able to inspect the pre-selected zone to make sure whether there is carry damages occurred.
In previous studies, the new type of steel bridge column design has successfully control the plastic deformation to the pre-selected position with this arrangement, the energy is dissipated to the pre-selected energy-dissipating plate. The dissipated energy of the new design is better than traditional steel bridge column.

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