新旧《混凝土重力坝设计规范》结构计算对比探讨

Study on Comparison of Structural Calculation in Newly and Previously-edited Design Code for Concrete Gravity Dam

结合新修订的《混凝土重力坝设计规范》(NB/T 35026-2014)与旧规范《混凝土重力坝设计规范》(DL5108-1999)对比分析,新规范采用承载能力极限状态对坝体结构及坝基岩体进行强度和抗滑稳定计算,并调整了结构重要性系数γ_0,混凝土/基岩抗剪断材料性能分项系数γ_m以及抗滑稳定极限状态设计时的结构系数γ_d。通过对比分析结构重要性系数、材料性能分项系数和结构系数调整前后的计算结果,提出设计中应重点考虑的参数对象,为新规范的应用推广和重力坝设计提供参考和借鉴。

Based on the newly-edited Design Code for Concrete Gravity Dam（ NB/T 35026-2014） and the previously-edited Design Code for Concrete Gravity Dam（ DL5108-1999）,comparison and analysis are performed. In the newly-edited code,the limit state of bearing capacity is applied to carry out calculation of strength and stability against sliding of the dam structural and dam foundation rockmass. The structural importance coefficient γ_0,partial factor γ_m of the shearing material performance between concrete and bedrock,and structural coefficient γ_d while the limit state of stability against sliding is design all are revised,Through comparison and analysis of the structural importance coefficient,partial factor of material performance and calculation before and after the structural coefficient is adjusted,parameters to be considered especially in design are raised. This provides application and development of the new code as well as the gravity dam design with reference.