重庆大学学报2018，Vol.41Issue(1)：30-41,12.DOI:10.11835/j.issn.1000-582X.2018.01.004
考虑弯剪相关性的钢筋混凝土受弯构件承载力计算
Calculation of bearing capacity of reinforced concrete bending members considering correlation between bending and shearing
摘要
Abstract
There is correlation between flexural capacity and shearing capacity in RC(reinforced concrete) bending members.Chinese code GBJ10-89,GB50010,JTJ023-85 and JTG D62-2004,as well as American code ACI318 basically follow the same guidelines.They do not consider the bearing capacity correlation between bending and shearing sufficiently.The amount of longitudinal reinforcement and stirrup of a RC bending member is respectively calculated according to its normal section bearing capacity and oblique section bearing capacity.Only for independent beams under concentrated load,the influence of bending moment on shearing bearing capacity are considered through the shear-span ratio.Based on the analysis of the implicit correlation of bending and shearing from GB50010 and ACI318 strength criteria in stress level,and the effect of shear-span ratio in bearing capacity code formula,a modified formula considering the correlation of bending and shearing is put forward.By introducing several typical examples,the amount of reinforcement with different parameters is calculated with the modified formula and the code formula,respectively,and the reliability indexes of the two formulas are compared.Moreover,according to the target reliability index requirements of Chinese code GB50068-2001,the necessity of considering the correlation of bending and shearing in RC bending member is discussed.关键词
RC受弯构件/相关性/修正公式/可靠指标/安全性Key words
reinforced concrete bending member/correlation/modified formula/reliability index/safety分类
建筑与水利引用本文复制引用
张望喜,刘精巾,陈宝,邓曦..考虑弯剪相关性的钢筋混凝土受弯构件承载力计算[J].重庆大学学报,2018,41(1):30-41,12.基金项目
国家重点研发计划专项资助项目(2016YFC0701400) （2016YFC0701400）
国家自然科学基金资助项目(51578228).Supported by National Key Research and Development Program of China (2016YFC0701400) and National Natural Science Foundation of China(51578228). （51578228）
