本研究針對梁腹板開孔 (Web Opening) 減弱式鋼梁柱接頭，以有限元素分析探討其耐震設計及火害行為。本研究先對既有案例接頭進行梁斷面彎矩及剪力強度檢核，並透過文獻研析設計方法和流程，後以同樣案例接頭重新進行腹板開孔設計，最後經有限元素分析驗證，改良設計的接頭試體皆能有效地將塑鉸移離柱面，且變形達規範要求4%弧度時柱面抗彎強度超過梁斷面塑性彎矩0.8倍或相當接近。有限元素分析也顯示，高溫作用下鋼梁柱接頭強度可能降低許多，而改良型式開孔設計接頭之受火行為，仍需後續實驗驗證與分析研究。

In this study, the seismic performance and fire behavior of steel beam-to-column connections with web openings have been analyzed using finite element methods (FEM). First, literature review and case study analyses were made to refine the design process and parameters of web openings. Then the web openings of the connections in previous studies were redesigned and the seismic performance and fire behavior of the connections were simulated. The results of FEM simulation shows that the redesigned web openings can effectively move the plastic hinge away from the column face, and the bending moment at the column face may not decrease to 80% of the beam plastic bending moment or have similar strength at the 4%-radian drift-angle. The results also indicates that high temperature may cause the connection to lose strength rapidly. There is uncertainty about the fire behavior of steel beam-to-column connections with web openings, and the FEM simulation needs experimental verification and detailed analyses in the coming future.

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