- 摘 要
-
（西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）
［摘要］有效寬度法或直接強(qiáng)度法計(jì)算壓型鋼板承載力的關(guān)鍵之一是計(jì)算截面板件的局部屈曲應(yīng)力，而針對壓型鋼板開孔受壓翼緣，目前尚無成熟的對其局部屈曲應(yīng)力的計(jì)算方法?；谡蹨p厚度法和折減面積法，參照無孔受壓翼緣局部屈曲應(yīng)力的計(jì)算思路，通過引入折減系數(shù)Be，提出了壓型鋼板開孔受壓翼緣局部屈曲應(yīng)力的實(shí)用計(jì)算公式。通過數(shù)值模擬對受壓翼緣單開孔、單排均勻開孔及多排均勻開孔的局部屈曲進(jìn)行分析，并與公式計(jì)算結(jié)果進(jìn)行對比，研究了實(shí)用計(jì)算公式在不同開孔情況下的適用性。結(jié)果表明，折減面積法簡單易行，相比折減厚度法計(jì)算精度更高，且能考慮縱橫向開孔間距不同的情況，滿足實(shí)際工程設(shè)計(jì)需要，為《冷彎薄壁型鋼結(jié)構(gòu)技術(shù)規(guī)范》（GB 50018—2002）的修訂提供依據(jù)。
［關(guān)鍵詞］壓型鋼板； 局部屈曲； 受壓翼緣； 折減面積法； 折減厚度法
中圖分類號：TU391文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)14-0099-04
Local buckling analysis and design strategy on perforated compression flange of profiled steel sheet
Zhong Weihui, Gong Le, Hao Jiping
(School of Civil Engineering， Xi′an University of Architecture and Technology， Xi′an 710055， China)
Abstract:One of the keys to calculate the carrying capacity of profiled steel sheet by direct strength method or effective width method is to calculate the buckling stress of section plate. For perforated compression flange of profiled steel sheet, there is no proven method to calculate its local buckling stress. Based on thickness reduction method (TRM) and area reduction method (ARM), and referring to the thinking of local buckling stress calculation for no-perforated compression flange, the practical calculation formula for local buckling stress on perforated compression flange of profiled steel sheets was proposed by introducing the reduction coefficient Be. The local buckling stress on perforated compression flange with uniform openings, including single, single-row and multiple rows were obtained through the numerical simulation. The numerical results were compared to the practical calculation formula results, and the applicability under different opening conditions was discussed. It indicates that ARM is simple and easy to operate, which is more accurate than TRM, and could consider the different distances between the vertical and horizontal openings. Therefore, ARM is more efficient to meet the needs of actual engineering design, and provides the basis for the revision of Technical code of cold-formed thin-wall steel structures（GB 50018—2002）.
Keywords:profiled steel sheet; local buckling; compression flange; area reduction method; thickness reduction method
*國家自然科學(xué)基金青年科學(xué)基金項(xiàng)目（51308442）。
作者簡介：鐘煒輝，博士，副教授，Email：zhongweihui1980@163.com。
- 下載地址
-
