局部高密度钢纤维钢筋混凝土梁开裂后截面内力非线性分析

NONLINEAR ANALYSIS OF THE CRACKED SECTION OF PARTIALLY HIGH PERCENTAGE FIBER REINFORCED CONCRETE BEAM WITH STEEL BARS

分析了局部高密度钢纤维钢筋混凝土 (简称钢筋PHPFRC)弯曲构件截面应力分布特点 ,提出了供分析计算用的高密度钢纤维混凝土 (SIFCON)应力应变模型 ,对截面上可能出现的应力变化情况进行了分析 ,给出了截面应力合力的计算公式并给出了计算框图 。

In this paper,the distributions of stresses on the cracked section of PHPFRC(Partially High Percentage Fiber Reinforced Concrete)beam with steel bars are analyzed.The nonlinear stress strain models of different materials(including SIFCON)in the beam are introduced,and the different formulas for the calculation of internal forces on the cracked section are deduced according to the different development stages of strain.Based on the deduction of the formulas mentioned above and the establishment of a flow diagram for the calculation,a program for the analysis of the internal force on the cracked section can be worked out.