摘要
为了能快速、准确地按规范要求完成配筋面积计算,通过分析局部均匀配筋的计算公式,分析《建筑基坑支护技术规程》(JGJ 120—2012)中圆形截面支护桩正截面受弯承载力计算公式;运用Matlab绘制弯矩与混凝土受压区圆心角2πα的函数曲线,初步确定求解超越方程时α的分布范围,从而保证求解超越方程时迭代过程的收敛性。通过分析局部均匀配筋的计算公式,明确了适筋梁的判定条件,实际运用非常方便。
In order to quickly and accurately complete the calculation of reinforcement area according to the requirements of the specification,by analyzing the calculation formula of local uniform reinforcement,it's analyzed with the calculation formula of flexural bearing capacity of normal section for circular supporting piles in Technical Specification for Retaining and Protection of Building Foundation Excavations(JGJ 120—2012).The plotting the function curve of bending moment versus central angle 2παwhich lies in the compressive zone of concrete based on Matlab,the distribution range ofαin solving transcendental equation is preliminarily determined to ensure the convergence of the iterative process.By analyzing the calculation formula of local uniform reinforcement,the judgement condition of balanced-reinforced beam is defined with very convenient practical application.
作者
龚道平
胡惠华
刘俊
GONG Daoping;HU Huihua;LIU Jun(Hunan Provincial Communications Planning,Survey and Design Institute,Changsha 410200,China)
出处
《路基工程》
2023年第4期27-31,共5页
Subgrade Engineering
基金
湖南省交通运输厅科技进步与创新计划资助项目(201003、202120)。
关键词
MATLAB
圆形截面
受弯承载力
局部均匀配筋
收敛性
Matlab
circular section
flexural bearing capacity
local uniform reinforcement
convergence
