给排水构筑物结构计算受桩基设计假定的影响

Influence of Pile Foundation Design Assumption on Structural Calculation of Water Supply and Drainage Structures

基于桩基受力特性,进行了给排水工程中端承桩和摩擦桩等桩型荷载传递特点的分析,并以某工程构筑物为例,选取最不利的一榀框架进行配筋,在同一结构模型下进行了构筑物底板支座型式的选择计算与特殊处理,并输入不同支座等效刚度进行了结果的对比分析。分析结果表明,同一结构模型下不同支座型式弯矩的正负、取值及最大弯矩位置变化等均存在较大不同,支座型式的假定对构筑物结构计算较为重要。同一结构模型的弹性支座在不同刚度下弯矩正负未变,仅在弯矩取值上有差异,但取值差距均不超出10%。

Based on the mechanical characteristics of pile foundation,the load transfer characteristics of end bearing pile and friction pile in water supply and drainage engineering are analyzed.Taking an engineering structure as an example,the most disadvantageous frame is selected for reinforcement.Under the same structural model,the type selection calculation and special treatment of the bottom plate bearing of the structure are carried out,and the results are compared and analyzed by inputting the equivalent stiffness of different bearings.The analysis results show that the positive and negative moment,value and maximum moment position of different support types are quite different under the same structural model,and the assumption of support type is more important for structural calculation.The positive and negative bending moments of the elastic supports of the same structural model remain unchanged under different stiffness,but there is only difference in the value of bending moment,but the difference is not more than 10%.