型钢连接装配式混凝土梁等效抗弯刚度研究  

Research on equivalent bending stiffness of fabricated concrete beams connected with section steel

作　　者：胡习兵 周莹 范周军 孙槐璟 HU Xi-bing;ZHOU Ying;FAN Zhou-jun;SUN Huai-jing(College of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,长沙410004

出　　处：《计算力学学报》2023年第5期781-786,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(2020JJ4943)资助项目。

摘　　要：型钢连接装配式混凝土梁截面抗弯刚度因构造做法差异而相差较大。基于小变形叠加原理,提出了该类构件在荷载作用下的挠度计算方法,根据等挠度原则,推导了构件的等效抗弯刚度计算公式,并与试验研究结果进行了比较,验证了公式的有效性。在此基础上,分析了型钢混凝土梁参数变化对变刚度构件整体抗弯刚度的影响。研究结果表明,型钢连接方式增大了装配式混凝土梁的抗弯刚度,减小了构件在荷载作用下的挠度变形,对构件和结构受力更为有利。The section bending stiffness of a fabricated concrete beam connected with section steel varies greatly due to the difference of construction practices.Based on the principle of superposition in small deformation theory,the deflection calculation method of this kind of member under load is proposed.According to the principle of equal deflection,the calculation formula of equivalent bending stiffness of the member is derived,and compared with the experimental results to verify the effectiveness of the formula.On this basis,the influence of parameters of steel reinforced concrete beams on the overall bending stiffness of variable stiffness members is analyzed.The results show that the steel connection method increases the flexural rigidity of the prefabricated concrete beam,reduces the deflection of the member under load,and is more beneficial to member and the structure.

关 键 词：装配式混凝土梁 型钢连接 变刚度 等效抗弯刚度 计算方法 

分 类 号：TU391[建筑科学—结构工程] O302[理学—力学]