【摘要】 为验证具有稳定二次刚度的钢-连续纤维复合筋(SFCB)增强混凝土柱在地震作用下有较小的残余变形和良好的可修复性,本文首先基于纤维截面模型,利用有限元软件OpenSees对SFCB增强的混凝土柱在往复荷载下的受力性能进行了数值模拟,然后介绍了SFCB增强混凝土柱在低周反复荷载作用下的部分试验结果,通过计算值与试验结果的比较,两者吻合良好,且都证明了SFCB增强混凝土柱具有明显而稳定的二次刚度和屈服后残余变形小的特性。最后通过对SFCB增强混凝土柱与普通RC柱的非线性动力时程分析进一步表明,在罕遇地震作用下,SFCB增强混凝土柱具有残余变形小,可修复性强的抗震性能。更多还原

【Abstract】 The concrete column reinforced by steel fiber composite bar(SFCB) is expected to possess a post-seismic performance of small residual deformation and good recoverability.To study its seismic performance,a numerical simulation based on fiber-section model of SFCB reinforced column under horizontal cyclic loading is conducted with the finite element software OpenSees.Then the numerical result is verified with part of the pseudo-static test result of the SFCB reinforced concrete columns,and show in a good agreement with the experimental results.Both the numerical result and experimental result show a characteristics of obvious and stable post-yield stiffness,small residual deformation.Finally a further study with dynamic time history analysis of the columns shows that the SFCB reinforced columns exhibit post-seismic performance of small residual deformation and good recoverability under rare earthquake.更多还原