压型钢板局部削弱后抗弯性能试验研究
Experimental Study on the Bending Behavior of Profiled Steel Sheets Following Local Weakening
徐强 1徐丽萍 1孟令辉 1王明 1李娜2
作者信息
- 1. 聊城大学建筑工程学院,山东聊城 252059
- 2. 塔里木职业技术学院智能工程学院,新疆阿拉尔 843300
- 折叠
摘要
为研究组合楼板作为承载构件时在压型钢板局部削弱后的受弯性能,对压型钢板的竖直与水平方向进行不同程度的弱化,并在弱化后对钢板进行无侧向约束的受弯试验,研究压型钢板削弱后的受弯性能及其破坏形式.试验结果表明:在均布荷载作用下,各组压型钢板的破坏均以跨中受弯屈曲破坏为主;水平方向洞口削弱了钢板上翼缘承载力,当水平洞口半径为20 mm时,试件抗弯承载力降低约15％;竖向洞口会阻碍钢板上、下翼缘应力的传递,当竖向洞口半径为25 mm时,试件抗弯承载力降低约10％.通过对比可知,水平方向的弱化对承载力的影响相较于竖直方向要更加明显.
Abstract
The vertical and horizontal directions of profiled steel sheets are weakened to various extent,in order to study the bending performance of profiled steel sheets that can be used as load-bearing members in composite floors after local weakening.After the weakening,the steel sheets are subjected to bending tests without lateral restraint to study the bending performance of profiled steel sheets after weakening and their failure modes.The test results show that each group of profiled steel sheets fail mostly due to mid-span flexural buckling failure under uniform load.The horizontal hole reduces the bearing capacity of top flange of steel sheet.The specimen's ability to withstand bending drops by around 15％when the horizontal hole's radius is 20 mm.Additionally,the vertical opening can prevent the upper and lower flanges of steel sheet from transferring stress.The bending capacity of the specimens can be reduced by around 10％when the radius of vertical opening reaches 25 mm.The comparison shows that vertical weakening has a more impact to the bearing capacity than horizontal weakening.
关键词
压型钢板/局部削弱/受弯性能/荷载-挠度曲线/荷载-应变曲线Key words
profiled steel sheet/local weakening/flexural performance/load-deflection curve/load-strain curve引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据