摘要
目前,钢筋混凝土(reinforced concrete, RC)矩形构件正截面承载力主要依据《混凝土结构设计标准》(GB/T 50010—2010)(2024年版)中给出的公式进行计算。虽然这些公式都是解析公式,但在实际运用中仍存在不便之处,例如公式种类繁多,不同受力情况对应不同的计算公式,需要求解大量辅助参数和方程,不便于手算。针对此类问题,力求严格按照混凝土和钢筋的本构关系,采用应变求解应力和内力的方法推导出解析公式,绘制一种新的用于承载力计算的无量纲诺模图。该方法计算过程简便、公式统一,适用于任意截面尺寸和C50及以下混凝土强度等级构件的承载力计算,还能在图中直接读取混凝土和钢筋极限应变、大小偏心、内力臂等信息。
Currently,the calculation of the bearing capacity of reinforced concrete(RC)rectangular members in normal section is primarily based on the formulas provided in the Standard for design ofconcrete structures(GB/T 50010—2010)(2024 edition).Although these formulas are all analytical formulas,there are still some inconveniences in practical application.For example,the wide variety of formulas,each corresponding to different loading conditions,requires the calculation of numerous auxiliary parameters and equations,which is not conducive to manual calculation.Aiming at these problems,an analytical formula has been derived by strictly adhering to the constitutive relationships of steel and concrete,and employing a strain-based method for solving stress and internal forces.A new dimensionless nomogram for capacity calculation has been developed.This method offer a simplified calculation process and unified formulas,applicable to members with arbitrary cross-sectional dimensions and concrete strength grades up to C50.Furthermore,it allows direct reading of key parameters from the diagram,such as the ultimate strain of concrete and steel reinforcement,large and small eccentric,and the internal force arm.
作者
伍时龙
周东华
赵署
农韦贵
WU Shilong;ZHOU Donghua;ZHAO Shu;NONG Weigui(Maguan County Rural Road Project Quality Supervision Station,Wenshan 663700,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650504,China)
出处
《四川建筑科学研究》
2025年第6期24-31,54,共9页
Sichuan Building Science
基金
云南省文山州科研发展专项资金资助项目(WS-KYFZXM24014)。
关键词
矩形构件
截面承载力
应变
应力
图算法
rectangular member
cross-section capacity
strain
stress
graphical algorithm
