EPS轻质混凝土的应力-应变曲线试验研究  

Experimental study on stress-strain curve of EPS concrete

作　　者：葛晓伟 刘剑平 宋鸽 刘朋 GE Xiaowei;LIU Jianping;SONG Ge;LIU Peng(School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,辽宁沈阳110870

出　　处：《混凝土》2024年第7期39-42,共4页Concrete

基　　金：国家自然科学基金面上项目(51974060);辽宁省重大科技专项(2020JH1/10300005)。

摘　　要：EPS(聚苯颗粒)混凝土是一种轻质、保温的新型墙体材料,通过对3组不同密度等级的EPS混凝土试样进行轴心受压试验,分析了其破坏形态、力学性能及应力-应变曲线。结果表明:EPS混凝土的破坏过程具有一定的韧性,随着密度等级的增加,混凝土刚度上升,抵抗弹性变形能力增加、脆性增强、破坏更加迅速。EPS混凝土的轴心受压应力-应变曲线分为上升段、下降段和斜直线段,在试验研究与理论分析的基础上,通过拟合相关系数,提出了应力-应变曲线函数表达式,拟合结果与试验曲线较吻合,为EPS混凝土后续相关研究提供了参考,具有重要意义。EPS concrete is a new type of lightweight and thermal insulation wall material.Through the axial compression test of three groups of EPS concrete samples with different density grades,the failure morphology,mechanical properties and stress-strain curves are analyzed.The results show that the failure process ofEPS concrete has a certain toughness.With the increase of density grade,the concrete stiffness increases,the resistance to elastic deformation increases,the brittleness increases,and the failure is more rapid.The stress-strain curve of EPS concrete under axial compression is divided into ascending segment,descending segment and oblique straight segment.On the basis of experimental research and theoretical analysis,the stress-strain curve function expression is proposed by ftting the correlation coefficient.The fitting result is in good agreement with the test curve,which provides a reference for the subsequent relevant research of EPS concrete and is of great significance.

关 键 词：EPS混凝土 轴心受压 破坏形态 应力-应变曲线 拟合 

分 类 号：TU528.2[建筑科学—建筑技术科学]