In order to study the bearing performance of concrete sandwich arch roof and explore the bearing mechanism of structural mechanics,through the analysis of compression and bending force of concrete sandwich arch plate,the criterion formulas of cracking internal force and ultimate internal force under independent and combined action of concrete upper and lower arch slabs are derived,and the internal force distribution and deformation characteristics of two-hinged elliptical arch sandwich roof are analyzed by means of finite element simulation.Combined with the failure characteristics of roof,the applicability of the criterion formula of cracking internal force and ultimate internal force is explored.The results show that the bearing capacity of the sand-wich arch roof under vertical load is closely related to the compression-bending internal force of the sandwich plate,and the crack-ing and crushing of the concrete sandwich arch plate generally occur at l/20 away from the arch foot,and the internal force state and stress level of the vault are relatively low.The cracking internal force formula of sandwich elliptical arch roof should be adopted,while the independent action criterion formula is recommended for the calculation of ultimate internal force.
关键词
夹芯板/椭圆拱/内力分布/承载能力/变形规律
Key words
sandwich board/elliptical arch/internal force distribution/bearing capacity/deformation law
维普
万方数据