二次受力碳纤维(CFRP)布加固混凝土偏压柱极限压应力研究

根据偏心柱的有效约束区和非有效约束区的分布特点,确定新的截面变化系数,提出偏心柱的等效径向约束力;对Lam and Teng模型进行改进,提出了一次受力下碳纤维(CFRP)布约束混凝土偏压柱极限压应力的计算方法,进而推导了二次受力下碳纤维(CFRP)布约束混凝土偏压柱极限压应力的计算方法;还采用ANSYS软件对碳纤维(CFRP)布加固混凝土偏压柱的一次受力、二次受力的极限压应力进行了数值模拟,将试验值、理论值及ANSYS值进行对比,结果基本吻合,证明了理论推导的科学性,为加固工程提供了理论参考.

Study on the ultimate compressive stress of rectangular concrete columns with CFRP Sheets under secondary eccentric loading

According to the characteristics of the eccentric column effective constraint district and non-effective constraint area distribution,a new sectional coefficient of variation is determined and eccentric column equivalent radial binding is put forward.The ultimate compressive stress of rectangular concrete columns with CFRP Sheets under first eccentric loading is put forward on improving Lam and Teng model.Thus,the ultimate compressive stress of rectangular concrete columns with CFRP Sheets under eccentric loading is derived.The ultimate compressive stress of rectangular concrete columns CFRP Sheets under first or secondary loading is simulated through ANSYS software.By comparison,theoretical results with the ANSYS simulation are basically consistent,and the theoretical derivation has the scientific nature and provides some references for reinforcement project.