负弯矩作用下钢-混凝土组合梁掀起力计算研究  

THEORETICAL ANALYSIS OF UPLIFT FORCE OF STEEL-CONCRETE COMPOSITE BEAMS UNDER NEGATIVE MOMENT

作　　者：廖文远[1] 周东华[1] 李龙起[1] 姚凯程[1] 韩春秀[1] 

机构地区：[1]昆明理工大学土木工程学院,昆明650093

出　　处：《工业建筑》2015年第10期166-170,201,共6页Industrial Construction

基　　金：国家自然科学基金项目(51268022);国家青年科学基金(51308269)

摘　　要：在弹性体变形理论基础上,利用力的平衡原理及变形协调条件,建立负弯矩作用下同时考虑水平滑移和竖向掀起的钢-混凝土组合梁力学模型,通过推导对应的微分方程,编制计算程序求解,得到负弯矩作用下组合梁栓钉掀起力的计算表达式。计算结果表明:在同一荷载作用下,单个栓钉掀起力随着栓钉间距的增大而增大。计算与试验结果的对比表明:二者吻合较好,该计算方法准确、可靠,可为考虑竖向掀起作用的连续组合梁负弯矩区界面交互作用研究提供理论参考。Based on the elastic deformation theory, a mechanical model of composite beam under negative moment was established by considering the surface slip and vertical uplift effects.The differential equation was derived by using the principle of force equilibrium and deformation compatibility condition.Calculation program was developed and obtained the formula of vertical uplift force under negative moment.The results showed that composite beam under same load condition, the uplift force of single stud was increased with the increasing of distance between studs. All the numerical results were verified by comparing with experiment results to illustrate the accuracy and reliability of the calculation method.The result provided a theoretical basis for interface study considering the surface slip and vertical uplift effects of continuous composite beam.

关 键 词：组合梁 负弯矩 栓钉 竖向掀起力 

分 类 号：TU398.9[建筑科学—结构工程]