大跨度预应力型钢混凝土楼盖竖向受力性能分析  

Numerical analysis of vertical behavior of large-span prestressed steel reinforced concrete slab

作　　者：韩天成 梁书亭[1] 朱筱俊[1,2] 王文康 杨简 Han Tiancheng;Liang Shuting;Zhu Xiaojun;Wang Wenkang;Yang Jian(School of Civil Engineering,Southeast University,Nanjing 211189,China;Architectural Design and Research Institute Co.,Ltd.,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学土木工程学院,南京211189 [2]东南大学建筑设计研究院有限公司,南京211189

出　　处：《东南大学学报（自然科学版）》2023年第2期218-228,共11页Journal of Southeast University：Natural Science Edition

摘　　要：为系统研究预应力型钢混凝土楼盖(PSRCS)结构在竖向荷载下的承载机理及力学性能,提出了一种新型PSRCS构造形式,推导了其在不同受力情况下的正截面受弯承载力、截面刚度、挠度、平均裂缝间距和最大裂缝宽度等理论计算方法.通过ABAQUS软件进行数值分析并建立了对比模型,研究了PSRCS的承载能力、刚度和抗裂性能,并将有限元分析结果与理论公式计算结果进行了对比研究.研究结果表明:PSRCS与普通钢筋混凝土楼盖、型钢混凝土楼盖相比,其屈服荷载分别提升了86.5%和12.4%;楼盖跨中受拉损伤区域长度分别降低了37.2%和32.5%;PSRCS内型钢和受拉纵筋的屈服应力和屈服区域均得到有效降低.In order to systematically investigate the mechanical properties and vertical behavior of prestressed steel reinforced concrete structure,a novel form of prestressed steel reinforced concrete slab(PSRCS)is proposed,and the theoretical calculation formulas for its bearing capacity,section stiffness,deflection,average crack spacing,and maximum crack width are derived under different conditions.The PSRCS is analyzed numerically using the ABAQUS software,and several comparative models are established to systematically investigate the load capacity,stiffness,and anti-crack performance,and the results are compared with those of theoretical formulas.The results show that compared with ordinary reinforced concrete slab(RCS)and section steel reinforced concrete slab(SRCS),the yield load of PSRCS is increased by 86.5%and 12.4%,and the length of the tensile damage zone at the mid-span of the slab is reduced by 37.2%and 32.5%.The yield stress and yielding area of the section steel and longitudinal reinforcement within the slab of PSRCS are effectively reduced.

关 键 词：大跨度结构 预应力 型钢 组合结构 抗弯性能 

分 类 号：TU398.1[建筑科学—结构工程]