摘要
目的探究不同型钢厚度、混凝土强度对螺栓连接装配式混凝土梁的力学性能影响.方法利用有限元软件ABAQUS建立数值模型,运用拟静力方法,对结构施加低周反复荷载,对比螺栓连接装配式混凝土梁与普通混凝土梁的承载力、刚度、塑性及变形能力变化情况.结果螺栓连接装配式混凝土梁的滞回曲线比普通混凝土梁的滞回曲线饱满,骨架曲线斜率更高;增大型钢厚度,试件滞回曲线更饱满,滞回环面积更大;提高混凝土强度,骨架曲线斜率增大,刚度系数也增大.结论螺栓连接装配式混凝土梁相比于普通混凝土梁具有更好的耗能能力;增加型钢厚度及提高混凝土强度均能提高试件的形变能力及吸能能力.
The purpose of this paper is to investigate the influence of different steel thickness and concrete strength on the mechanical properties of bolted fabricated concrete beams.The numerical model was established by using the finite element software ABAQUS.The low-cycle repeated load to the structure was applied by using the quasi-static method.By comparing changes in bearing capacity,stiffness,plasticity and deformation capacity of bolted fabricated concrete beams and common concrete beams.Results show that the hysteretic curve of bolted fabricated concrete beams is fuller and the slope of the skeleton curve is higher than that of common concrete beams.The hysteresis curve of the specimen is fuller and the area of the hysteresis loop is larger by increasing the thickness of the profile steel.The slope of the skeleton curve and the stiffness coefficient are also increased by increasing the strength of the concrete.The main conclusions inferred from the results are summarized below:the bolted fabricated concrete beam has better energy consumption than the common concrete beam capacity,increasing the thickness of section steel and the strength of concrete can improve the deformation and energy absorption capacity of the test piece.
作者
王宇
梁云峰
杨春燕
杨永生
WANG Yu;LIANG Yunfeng;YANG Chunyan;YANG Yongsheng(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;Liaoning Municipal Engineering Design&Research Institute Co.Ltd.,Shenyang,China,110055;Editorial Department of Journal,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2020年第2期239-246,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(11672190)。
关键词
螺栓连接
装配式混凝土梁
低周反复荷载
有限元分析
bolted joints
prefabricated concrete beams
cyclic loading
finite element analysis
