建築結構的梁柱接頭多屬於半剛性接頭,本文主要介紹常見的鋼結構接頭,並說明歐洲規範(EC3)與學者如何區分接頭強度。此外本文也說明鋼結構接頭的 接頭模型的彎矩-旋轉角關係,模擬半剛性接頭的塑性反應,對於半剛性接頭接合處本文對於水平及垂直方向利用伸縮彈簧束制此方向自由度,而旋轉方向則利用旋轉彈簧來做接合,將向量式有限元的內力特性作改變,即將彈簧產生的內力與內力彎矩納入考慮中,即可模擬鋼結構半鋼性接頭受力的P–Δ效應及受力行為。 本文分別利用解析解說明伸縮彈簧與旋轉彈簧的模擬正確性,並將半剛性接頭的模擬與學者的模擬比較驗證可行性,最後將彈簧的非線性效果納入探討說明梁柱半剛性接頭模擬的可行性。
In structures, the connections of beam and column were often semi-rigid connection. Hence, this article introduced the general connections in steel structures, and illustrated how the Eurocode3 (EC3) and scholars discriminate the strength of connections. This article also shows the relationship of moment-curvature of steel structure connection models, and simulated the reaction of semi-rigid connection, and use flexible spring to control horizontal and vertical direction, and use rotate spring to control rotate direction. and then considered the internal force and internal moment of spring in Vector Form Intrinsic Finite Element (VFIFE, V-5), and could simulate the stress behavior and P–Δ effect of semi-rigid steel connections. This article use exact solution to shows the accuracy of the simulation of flexible and rotate spring, and verify the feasibility of simulation, and probe the effect of nonlinear spring into the feasibility of simulation of semi-rigid connections of beams and columns.