无黏结预应力型钢混凝土偏心受压构件非线性分析

Nonlinear analysis of eccentrically loaded members of prestressed steel reinforced concrete using unbonded tendons

为了研究无黏结预应力型钢混凝土偏心受压构件的工作性能,采用纤维模型法编制非线性分析程序,通过绘制曲线的方法,更直观的来研究其荷载与变形的关系。以混凝土强度等级,作用点至截面形心的距离,长细比以及构件的含钢率作为主要研究参数来分析其对荷载-变形关系曲线的影响。最后得出结论:混凝土强度等级的提高,含钢率的增加会提高构件的承载能力;偏心距和长细比的增大会大幅度降低构件的承载能力。

To analyze the static performance of eccentrically compressed prestressed steel reinforced concrete members, a fiber model- ing was introduced in creating a nonlinear analysis program to compute the relationship between load and deflection. The influences of strength of concrete, slenderness ratio, eccentricity, steel - reinforced ratio on the mechanical property of eccentrically loaded members were analyzed.Also the corresponding load - deflection curves were drawn from the previous models.The results indicate that the bear- ing capacity of composite members increased with increasing core concrete strength and steel - reinforced ratio, decreased with increas- ing eccentricity and slenderness ratio.