- 摘 要
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（1 銅陵市建筑工程施工圖設計文件審查有限公司， 銅陵 244000；2 銅陵市建設工程質(zhì)量監(jiān)督監(jiān)測有限公司， 銅陵 244000）
［摘要］對門式剛架抗風柱與山墻鋼梁下翼緣通過豎向長圓孔螺栓連接進行受力分析，對端開間檁條不同情況下風荷載系數(shù)取值進行比較。結(jié)果表明，風荷載作用下，抗風柱與鋼梁下翼緣通過豎向長圓孔螺栓連接時，山墻鋼梁受扭，端開間檁條受拉，連接節(jié)點會產(chǎn)生較大內(nèi)力。若采用抗風柱與鋼梁下翼緣通過豎向長圓孔螺栓連接的方法，則應根據(jù)風荷載和山墻鋼梁高度大小，在端開間抗風柱對應位置設垂直支撐、斜向剛性系桿或斜撐；否則，應采取以下措施：對連接節(jié)點進行承載力驗算；通過適當加大翼緣寬度、翼緣和腹板的厚度使其具有一定的強度富余；在抗風柱位置布置檁條；雙坡屋面兩邊檐口附近的端開間檁條及單坡屋面低區(qū)檐口附近的端開間檁條，在受荷面積不小于10m2且設計由風吸力作用控制時，應適當加大其截面。
［關鍵詞］門式剛架；抗風柱；鋼梁下翼緣；豎向長圓孔螺栓連接；風荷載；檁條；最大風壓
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2021)09-0128-08
Problem and improvement of connection between wind-resistant column of portal frame and lower flange of steel beam
LI Guosheng1,2
(1 Tongling Construction Drawing Design Review Co., Ltd., Tongling 244000, China; 2 Tongling Construction Quality Supervision Co., Ltd., Tongling 244000, China)
Abstract:The mechanical analysis of the wind-resistant column of the portal frame and the lower flange of the gable steel beam connected through the vertical oblong hole bolts was carried out, and the wind load coefficient values of the purlins between the end splits were compared under different conditions. The results show that under the action of wind load, when the wind-resistant column and the lower flange of the steel beam are connected by vertical oblong hole bolts, the gable steel beam is torsioned, the purlins between the end splits are stretched, and the connection nodes generate a large internal force. If the wind-resistant column and the lower flange of the steel beam are connected by vertical oblong hole bolts, vertical supports, diagonal rigid tie rods or diagonal bracings should be set at the corresponding position of the wind-resistant column of the end splits according to the wind load and the height of the gable steel beam; otherwise, the following measures should be taken: the bearing capacity of the connection nodes should be checked; appropriately increasing the width of the flange, the thickness of the flange and the web to make it have a certain degree of strength; the purlins should be arranged at the position of the wind-resistant column; the cross-sections of the purlins near the cornices on both sides of the double-slope roof and the purlins near the cornices in the low area of the single-slope roof shall be appropriately enlarged when the load area is not less than 10m2 and the design is controlled by wind suction.
Keywords:portal frame; wind-resistant column; lower flange of steel beam; vertical oblong hole bolt connection; wind load; purlin; maximum wind
作者簡介：李國勝，學士，高級工程師，Email:693950802@qq.com。
