不同剪跨比的无腹筋UHPC梁抗剪承载力有限元分析

FINITE ELEMENT ANALYSIS ON SHEAR CAPACITY OF UHPC BEAMS WITHOUT WEB REINFORCEMENT WITH DIFFERENT SHEAR-SPAN RATIOS

为探讨剪跨比对无腹筋UHPC梁抗剪承载力的影响,文中采用ABAQUS有限元软件,以剪跨比为主要参数,对3种不同剪跨比的无腹筋UHPC简支梁的抗剪承载力进行数值分析,与试验结果相比较,吻合较好。在此基础上,考虑不同的剪跨比进行参数分析,结果表明:随着剪跨比的增大,无腹筋UHPC梁的抗剪承载力降低,且降低速率逐渐减小;剪跨比越大,纵筋配筋率对抗剪承载力的提高幅度越小。文中采用的有限元分析方法为无腹筋UHPC梁的抗剪承载力设计和计算提供参考。

To investigate the influence of shear--span ratios on the shear capacity of UHPC beams without web rein-forcements,the shear capacity of UHPC beams without web reinforcement was analyzed by using ABAQUS finite ele-ment software.The results show that the material model and FEA model used in this paper can simulate the UHPC beam well.With the increase of shear-span ratio,the shear capacity of UHPC beams without web reinforcement de-creases,and the decreasing rate gradually reduces;with the increase of shear span ratio,the increase of reinforcement ratio on shear capacity becomes smaller.The FEA method proposed in this paper provides a reference for the design and calculation of shear capacity of UHPC beams without web reinforcement.