大底盘压型钢板抗弯承载力计算方法  

CALCULATION METHOD OF FLEXURAL CAPACITY OF A WIDE TRAY SHEETING

作　　者：吴华英 陈友泉 WU Huaying;CHEN Youquan(Hangxiao Steel Structure（Jiangxi）Co.Ltd,Nanchang 330013,China)

机构地区：[1]杭萧钢构(江西)有限公司,南昌330013

出　　处：《钢结构》2018年第9期83-87,47,共6页Steel Construction

摘　　要：对大底盘压型钢板在跨中弯矩和支座弯矩作用下,大底面受压和受拉两种情况下的有效截面计算方法进行讨论:超大宽厚比的大底面板件受压时有效截面的二次折减、受拉时卷曲引起的有效截面计算、剪力滞后效应引起的截面宽度折减系数等。通过一个实际工程的算例,说明卷曲效应会引起有效截面显著减小。The effective sections calculations of a wide tray sheeting under tension and compression by support moment and span centremidspan moment respectively were discussed： reduction for effective wide of a super large width-thickness ratio flange in compression,calculation for effective wide of a super large width-thickness ratio flange in tension allowing for possible curling,calculation of reduction factor for shear lag effects because of super shear-span ratio. An practical design example was put out such as effective sections were greatly reduced by sheeting curling.

关 键 词：大底盘压型钢板 板件屈曲 有效截面 翼缘卷曲 剪力滞后 

分 类 号：TU392.1[建筑科学—结构工程]