Practical Design Method of Spherical Shell Concrete Structure

Based on the theory of thin shell, a simplified calculation model is raised to conduct the analysis of the internal force of variable cross-section of shell concrete structure reinforced by ring beams under various loads. The model selects one-sixteenth of a sphere as the computing unit and simplifies the node, transmit only shaft and shear instead of moment. The calculation diagram selects three vertical hinge arches which are insensitive to changes of thickness. The thickness of the wall should be considered in the structure calculation. Because of the elastic-plastic characteristics of RC structures, the internal force varies according to the change of reinforcement. These construction measures are the guarantee for the implement of calculation figure. This method which was justified by the successful engineering practice could be applied to check the calculation results of spherical shell structure carried out by software. In addition, the model deserves being presented as theoretical support and reference for engineering practice.