新型钢筋桁架混凝土叠合双向板刚度和挠度计算方法研究

Research on calculation method for stiffness and deflection of the new steel bar truss concrete superimposed two-way slab

根据已完成的新型钢筋桁架混凝土叠合双向板和现浇双向板对比试验成果,针对新型叠合双向板受力特性介于一次受力与二次受力之间的特点,结合我国规范以及相关理论与设计方法,引入相关折减系数对既有等效刚度计算方法的结果进行适当修正,最终提出新型叠合双向板的刚度和挠度计算方法。将计算结果与实测结果比较可知,计算值与试验值基本接近,误差在15%以内,验证了方法的准确性。最后提出了相关设计建议。

According to results of the contrast test on new steel bar truss concrete superimposed two-way slab and cast-in- situ two-way slab, in view of the mechanical characteristics of the new superimposed two-way slab between primary loads and secondary loads, its stiffness and deflection calculation methods were put forward based on Chinese code and correlation theory and design method. Related reduction coefficient to improve existing formula for equivalent stiffness was introduced. Its accuracy was validated by comparison of calculation and test results that the error between them was controlled within 15%. At last, some suggestions were proposed.