新旧规范中混凝土抗冲切承载力验算的对比与分析

Comparison and Analysis of the Punching Shear Capacity in New and Old Specifications

通过对我国新旧《混凝土结构设计规范》中有关混凝土抗冲切承载力验算的对比和分析,得出了二者的联系与不同。认为新规范在保证安全度的情况下适当的降低了可靠性指标,更全面的考虑了影响受冲切承载力的因素;还补充了双向预应力混凝度板和板柱结构受冲切承载力计算的相关内容。从而可使工程设计人员能够更加灵活的运用新规范进行结构设计。

The new and old specifications of punching shearing capacity in code for design of concrete structures in China are compared and analysed,their relation and difference are obtained.It is considered for the new specification that the reliability index are decreased appropriately on the guarantee of safety,the more factors which influence the punching shearing capacity are included,and the calculation on the punching shearing capacity of two way slab for prestressed concrete and the slab-column structures are specified.So this leads to designers to carry out calculation flexibly according to the new specifications.