论文部分内容阅读
目的将ECC替代混凝土用于建筑结构以解决因混凝土脆性导致的开裂和耐久性问题.方法提出ECC材料简化拉、压应力-应变关系模型,并通过有限元模拟方法对钢筋增强ECC(R/ECC)柱偏心受压力学性能进行评估.在此基础上,以偏心距为参数,分析了各偏心率下R/ECC偏心受压构件的荷载-变形曲线,得出了承载力N_u-M_u关系曲线.结果笔者提出的模型能够准确地模拟R/ECC构件的承载力及变形行为.在各偏心率下,R/ECC柱的抗弯承载力均要显著大于RC柱,通过应变云图分析可以得知,R/ECC柱受拉侧ECC能够始终提供稳定的抗拉承载力,使得R/ECC柱的极限弯矩要大于RC柱.结论相同条件下,R/ECC柱偏心受压承载力和延性均要明显优于RC构件.
Abstract: The purpose of this paper is to use ECC alternative concrete in building structure to solve the problem of cracking and durability caused by concrete brittleness.Methods A simplified model of the relationship between tensile and compressive stress-strain of ECC material was proposed and reinforced by ECC (R / ECC ) On the basis of eccentricity, the load-deformation curves of R / ECC eccentric compression members under different eccentricities were analyzed, and the relationship curve of bearing capacity N_u-M_u was obtained Results The model proposed by the author can accurately simulate the bearing capacity and deformation behavior of R / ECC members.At each eccentricity, the flexural capacity of R / ECC columns should be significantly larger than that of RC columns, which can be obtained by strain cloud analysis , The ECC of the R / ECC column can always provide a stable tensile strength and the ultimate bending moment of the R / ECC column is larger than that of the RC column.Conclusion The eccentric compression bearing capacity and ductility of the R / ECC column under the same conditions To be significantly better than RC components.