型钢混凝土梁的界面滑移位移的计算与分析

Calculation of Interface Slips in SRC Members in Bending

研究型钢混凝土简支梁在基本荷载作用下的界面滑移。以型钢上、下翼缘为界将型钢混凝土梁截面划分成三个不同的理想弹性体,利用弹性分析理论建立一般受力情况下界面滑移的微分方程组。通过分析其受力特点,推导出型钢混凝土简支梁在纯弯矩、对称集中荷载以及均布荷载作用下的型钢上、下翼缘与混凝土之间滑移量沿梁长度方向变化的关系式,并对三种情况下滑移量的模拟曲线分析对比。为用数学方式描述复杂受力情况下型钢与混凝土之间的界面滑移提供理论依据,同时为研究型钢混凝土梁界面的粘结滑移本构关系奠定了基础。

In the analytical model of SRC bending members the cross section of SRC member is divided into three elastic integrants by flanges of steel. Based on the theory of elasticity, the differential equations of interface slips in SRC simple beam under the action of general load is presented. Based on the characteristics of its load, similar equations of SRC beams under the action of pure bending moment, concentrated load and uniform pressure can also be established. Analysis and comparison of three slip curves, can provide theoretical basis for expressing interface slips between steel and concrete under complicated loads with mathematical expression, and for study on v-s constitutive curve between steel and concrete as well.