钢骨混凝土梁徐变效应分析

Creep Effect Analysis of Steel Reinforced Concrete Beam

研究了徐变效应对钢骨混凝土梁受力性能的影响.给出徐变函数数学模型,应用黏弹性理论,建立钢骨混凝土梁徐变效应分析模型,研制钢骨混凝土梁徐变效应分析计算程序,研究了钢骨混凝土简支梁在徐变效应影响下的承载能力、应变变化、变形性能及交接面滑移等性能.计算结果表明,沿梁长范围内,跨中截面处的弯矩、应变和变形最大,滑移最小;在荷载作用后的初始阶段,跨中弯矩、应变、变形和滑移均有明显变化,之后各参数值随着时间的增长趋于一定值.

To study the creep effect on steel reinforced concrete beam, a mathematic model of creep function was developed, then some analytic models based on visco-elasticity theory were given to the computation procedure of creep effect, such as the bearing capacity, strain variation, deformation and interface slip. Results of the computation along the whole span of SRC beam showed that the values of mid-span moment, strain and deformation are maximum, while the mid-span slip value is minimum. During the initial stage of loading, the values of all these parameters change obviously, and later on they approach to constant.