全轻页岩陶粒混凝土梁受剪承载力计算模型  

Experimental study on the shear bearing capacity of all lightweight shale ceramsite aggregate concrete beams

作　　者：朱迪文 曹国辉[2] 张再华[2] 张升帆 肖勇刚 ZHU Diwen;CAO Guohui;ZHANG Zaihua;ZHANG Shengfan;XIAO Yonggang(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Hunan Engineering Research Center of Development and Application of Ceramsite Concrete Technology,Hunan City University,Yiyang,Hunan 413000,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]湖南城市学院陶粒混凝土技术研发与应用湖南省工程研究中心,湖南益阳413000

出　　处：《湖南城市学院学报(自然科学版)》2025年第2期1-5,共5页Journal of Hunan City University:Natural Science

基　　金：国家自然科学基金项目(52278174)。

摘　　要：为建立全轻页岩陶粒混凝土梁的受剪承载力计算模型,首先,共进行了9根全轻页岩陶粒混凝土梁受剪试验,分析了不同混凝土强度(LC25,LC35,LC45)、剪跨比(1.14、2.03、2.52)对试件受剪承载力的影响;然后,按照不同规范及计算模型进行计算,并基于国内外有关轻骨料梁试验数据,提出全轻页岩混凝土梁的受剪承载力计算公式。结果表明:按照美国规范、欧洲规范和其他计算模型计算的全轻页岩陶粒混凝土梁受剪承载力过于保守或误差较大,而按照我国《轻骨料混凝土应用技术标准》(JGJ/T 12—2019)计算的结果较为吻合,但部分试件预测结果偏于不安全;本研究提出的修正计算公式具有较高的拟合效果和可靠度。In order to establish a shear capacity model for all-lightweight expanded shale aggregate concrete beams,nine such beams were experimentally investigated considering different concrete strengths(LC25,LC35,LC45)and shear-span ratios(1.14,2.03,2.52).The influence of these factors on the shear capacity of specimens was examined.Calculations were carried out according to various codes and models,and based on the relevant experimental data of lightweight aggregate concrete beams from both domestic and international sources,recommendations for calculating the shear capacity of all-lightweight expanded shale aggregate concrete beams were proposed from a safety perspective.The calculation results indicate that shear capacity calculated according to American codes,European codes,and other models tends to be either overly conservative or shows significant errors.Calculations based on the formulas of China's JGJ/T 12—2019 show better agreement and have the lowest coefficient of variation,thereby offering better predictions for the shear capacity of oblique-section of all-lightweight expanded shale aggregate concrete beams.

关 键 词：轻骨料混凝土 受剪承载力 变异系数 计算模型 

分 类 号：TU528[建筑科学—建筑技术科学]