双向带肋复合墙板抗弯性能数值分析

Numerical Analysis of Bi-directional Ribbed Composite Wall Panels for Flexural Performance

针对目前混凝土复合墙板的研究一直局限于单向板,对双向板抗弯性能的研究尚不明确的现状,提出一种新型双向带肋复合墙板。为研究该类墙板的抗弯性能,采用ABAQUS软件建立其数值分析模型,通过对比分析,验证了有限元分析模型参数选取的有效性。在此基础上,分析了在简化均布荷载作用下四边简支双向带肋复合墙板本身的受力变形及裂缝开展情况。同时,研究该类墙板的肋条高度、肋条形状等参数变化对其抗弯性能的影响。结果表明:四边简支承受简化均布荷载的双向带肋复合墙板的裂缝开展模式与普通钢筋混凝土双向板类似;双向带肋复合墙板的抗弯承载力较传统复合墙板虽有所降低,但抗弯承载力降幅明显低于质量降幅,该墙板具有较好的减重效果。

For the current research on precast reinforced concrete composite panels has been limited to unidirectional panels,and the research on the bi-directional panels'flexural performance is still unclear.A new type of bidirectional rib-bed composite wall panel was proposed.In order to study the flexural performance of this type of wall panels,ABAQUS software was used to establish its numerical analysis model,and the validity of the selection of finite element analysis mod-el parameters was verified through comparative analysis.On this basis,the force deformation and crack development of four-side simply-supported bi-directional ribbed composite wall panels themselves were analyzed under the simplified uni-form load.At the same time,the influence of the variation of rib height,rib shape and other parameters on the flexural performance of such wall panels was investigated.The results show that,the crack development mode of four-side simply supported two-way ribbed composite wall panels subjected to simplified uniform load is similar to that of ordinary rein-forced concrete two-way panels.The flexural capacity of two-way ribbed composite wall panels is reduced compared with that of traditional composite wall panels,but the decrease in flexural capacity is obviously lower than the decrease in mass,and the wall panels have a better effect of weight reduction.