本研究針對配置開槽切削消能鋼板之預力式橋柱，複合摩擦機制 之承載行為進行探討，預力式橋柱藉由預力系統之優點，達到自我復 位之效果，並可避免結構主體的損壞，配合外加之消能系統，可提供 穩定之消能能力，並於震後替換消能鋼板即可修復結構，試驗提出以 開槽消能鋼板於預力接合處，利用預力結構之開角行為進行作用，更 利用擴大接合螺孔引入摩擦消能機制，控制消能鋼板以遲滯行為作用 之時機，可有效降低消能鋼板之修復成本，研究中更針對消能能力、 結構勁度以及設計方法進行分析與試驗結果進行比較。 研究結果顯示，配置開槽消能鋼板可有效提供消能能力，利用擴 大螺孔引入摩擦機制將影響結構行為，並可利用擴大孔控制消能鋼板 之作用時機，於小地震利用摩擦進行消能，震後消能鋼板仍能保持彈 性，於大地震後利用材料之遲滯行為增加消能量，震後僅需替換消能 鋼板進行修復，亦提出簡易之公式以提供工程上之簡易推估計算，由 上述結果顯示，開槽式切削消能鋼板消能能力十分良好，引入摩擦機 制更可控制消能鋼板作用時機，避免於小地震後即需替換消能鋼板， 有相當之可行性應用於預力式橋柱結構。Post-tensioned bridge columns possess self-centering capability to minimize the residual deformation after earthquake. However, the energy dissipation mechanism of the system is limited as the structure is required to maintain elastic during the loading process. In order to improve the energy dissipation capacity of the system, a new energy dissipating mechanism was proposed in this study. The new type of energy dissipating mechanism was composed of post-tensioned bridge column and a pair of steel plates with reduced sections. A series of cyclic loading tests were conducted on the proposed energy dissipating mechanism. It was found from the tests that the system possessed stable hysteretic behavior and re-centering characteristics thus justified its application to the engineering practice.
