本論文完成 5組共16支鋼梁試體，研究含防挫屈裝置H型鋼梁下做反復載重試驗，探討梁在不同斷面配置下其行為。研究結果顯示：(1)H型鋼梁有作韌性切削的扭轉變形比無作韌性切削的量較小。(2)配置連續扭轉支撐可以提升梁的強度，使遲滯迴圈較飽滿，並大幅度降低扭轉變形的量。(3)鋼梁增設腹板加勁板並沒有改善鋼梁的性能。(4)H梁配置內側封板或外側封板，皆可提高H梁的強度及韌性，有效的抑制扭轉變形，但外側封板的效果較好。配置部分長的外側封板足以有效抑制扭轉變形。

Current research includes 5 series with total of 16 H-shape steel beam specimen to be tested under cyclic double curvature moment loading to observe the lateral torsional buckling of the beam with various kinds of lateral support arrangement. Some experimental results can be drawn from this research as following: (1) the maximum twist in the beam is less severe when reduced beam section (RBS) was used near beam column joint compare to the beam without RBS, (2) attaching torsional braces along top flange of the beam increases the maximum strength of the beam, results in less pinching behavior in the beam, and greatly reduces twist of the beam, (3) the use of additional vertical stiffener along the beam has very limited effect to the lateral torsional buckling behavior of the beam, (4) the use of side plates at the beam can effectively prevent the lateral torsional buckling of the beam when the length of the beam covered by side plates is long enough, the behavior is better when the side plates is put near edge of beam flange.

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