本論文利用高溫拉伸試驗與高溫實尺寸螺栓雙剪試驗結果，探討國內土木建築鋼結構常用之10T等級高強度螺栓高溫下機械性質，並將試驗結果作詳細之分析、比較與討論，亦將蒐集的各國高強度螺栓高溫下試驗資料整理出詳盡之強度與折減比較，根據所彙整的資料，合理歸納出8T等級高強度螺栓、10T等級高強度螺栓和10T等級高強度耐火螺栓之各溫度下極限強度折減曲線，並以此曲線再與國內常用之SN490系列鋼板比較其強度折減，得知常溫與高溫下之鋼結構螺栓接頭設計差異。此外，本研究也利用ABAQUS/Standard有限元素軟體做為數值模擬工具，建立一套合理模擬高溫實尺寸螺栓雙剪行為之數值模型，並以此數值模擬結果驗證所進行的高溫實尺寸螺栓雙剪試驗量測之可行性，而高溫拉伸試驗結果將作為數值模型建立之基礎，所模擬的結果與真實雙剪試驗結果相近，顯示所建立的有限元素數值模型可成功模擬高溫環境下之螺栓抗剪行為。

　　This thesis tested and studied the high-temperature mechanical properties of frequently used 10T class high strength bolts in Taiwan by the results from high-temperature tension coupon tests and real-scale double shear bolt tests. The high temperature test data of high strength bolts from other countries were collected and analyzed to develop the averaged high-temperature strength reduction curves of 8T class, 10T class and 10T-FR class bolts. These curves were compared with the strength reduction curves of SN490 class plates to discuss the design limit states of connections at high temperatures. In addition, the finite element software, ABAQUS/Standard, was employed to construct the numerical model for simulating the shear-resistance behavior of real-scale high strength bolts at high temperatures. The numerical results agree well with the experimental results from the high temperature double shear bolt tests, and the finite element model successfully simulates the shear-resistance behavior of high strength bolts at high temperatures.

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