摘要
目的采用一种新方法建立冷弯U型钢与混凝土组合梁的界面剪力计算公式,研究冷弯U型钢与混凝土界面剪力分布规律.方法分别计算混凝土板、剪力连接件、U型钢的应变能,利用变分原理建立冷弯U型钢与混凝土组合梁的界面剪力微分方程.结果给出了对称集中荷载和均布荷载作用下的U型钢与混凝土组合界面剪力计算公式.计算结果表明,组合梁的界面剪力随着连接刚度增加而增大,随着钢板厚度的增加而减小.结论连接体刚度与钢板厚度是影响冷弯U型钢与混凝土组合梁界面剪力的重要因素,界面剪力理论计算公式适用性需要试验进一步验证.
The article aims to study the interface sheafing force regularity of the steel and concrete composite beams with cold formed steel U section with a new method to build calculation formulas of interface shearing force with symmetrical concentrated loads and uniformly distributed load. The interface shearing force＇s dif- ferential equations were established based on various principle, in which the energy of strain for concrete flange plate and cold formed steel U section beam and shear connector are calculated. The calculating results show that the composite beam interface shearing force increases with the adding of connector stiffness and decreases with the adding of steel ratio. Therefore, the connector stiffness and steel ratio have certain influence on composite beams. The applicability of calculation formulas of interface sheafing force needs experiment to test and verify in the future.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2010年第1期108-111,共4页
Journal of Shenyang Jianzhu University：Natural Science
基金
教育部博士点基金项目(20050145012)
铁道部九局科技攻关项目(2007-0-1-49)
关键词
变分原理
冷弯U型钢
组合梁
界面剪力
various principle
cold formed steel U section
composite beam
interface sheafing force
