摘要
目的 研究暗梁式全预制板翼缘T型叠合梁(PTB)的抗弯力学性能。方法 采用ABAQUS建立试件模型与已有试验进行对比,验证模拟方法的准确性,分析了PTB与现浇T型梁(CTB)的力学性能。研究新旧混凝土之间摩擦系数、连接处后浇混凝土强度、纵向钢筋强度等参数对PTB抗弯力学性能的影响。结果 PTB与CTB抗弯承载力相差不大,最大相差不足9%;新旧混凝土之间摩擦系数、连接处后浇混凝土强度和纵向钢筋强度对其抗弯承载力几乎无影响;纵向钢筋直径对其抗弯承载力影响较小,最大相差不足5%;预制板搭接长度、抗剪箍筋截面面积、间距对其抗弯承载力影响相对较大,最小相差超过6%。结论 抗剪箍筋截面面积、抗剪箍筋间距和预制板搭接长度是影响PTB承载力的主要因素,随着抗剪箍筋截面面积增加、抗剪箍筋间距和预制板搭接长度减小,PTB承载力增大。
In order to study the bending mechanical properties of the T-composite beam with dark beam type full prefabricated plates as its′ flange(PTB).The specimen model established by ABAQUS was compared with the existing test to verify the accuracy of the simulation method.The mechanical properties of PTB and cast-in-situ T-beam(CTB) were compared.How the parameters influence the mechanical property of it was also analyzed, such as the friction coefficient between the old and the new concrete, the strength of post pouring concrete at the connection area, the strength of longitudinal reinforcement etc.It shows that the difference between the bending capacity of PTB and CTB is not big, the maximum difference of which is less than 9%.it has almost no effect on its bending capacity by changing the friction coefficient, the strength of post pouring concrete and the longitudinal reinforcement strength.Increasing the diameter of longitudinal reinforcement has little effect on it, and the maximum difference among them is less than 5%.The lap length of prefabricated plates, the section area of shear stirrup and spacing has a relatively large influence on its bending capacity, and the minimum difference is more than 6%.The shear stirrup section area, shear stirrup spacing and precast slab lap length are the main factors affecting the bearing capacity of PTB.With the increasing of the section area of shear stirrup, the decreasing of the shear stirrup spacing and the lap length of prefabricated plates, the bearing capacity of PTB increases.
作者
李明
周稚竣
樊志超
綦韦
杨贺
LI Ming;ZHOU Zhijun;FAN Zhichao;QI Wei;YANG He(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;The Fourth Construction Engineering Co.Ltd.,China Construction Second Engineering Bureall,Tianjin,China,300457)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第6期987-994,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51978422)
辽宁省教育厅面上项目(LJKZ0561)
辽宁省教育厅青年育苗项目(LNQN201907)
住房和城乡建设部项目(2019-K-080)。
关键词
预制T梁
抗弯承载力
抗剪箍筋间距
预制板搭接长度
抗剪箍筋截面面积
precast T-beam
bending capacity
shear stirrup spacing
the lap length of prefabricated plate
section area of shear stirrup
