摘要
利用液压伺服机对普通混凝土局部受压与偏载力学性能进行试验研究,设置4种不同加载面积与6种不同偏载位置的加载工况,得到混凝土试件破坏形态与应力-应变曲线,提取应力-应变曲线峰值应力与峰值应变特征参数,对比分析不同加载面积和偏载位置混凝土力学性能,主要得到以下结论:不同加载面积下混凝土峰值应力和弹性模量随着加载面积的减小而逐步增大,峰值应变却随之减小,其中峰值应力与加载面积系数呈冥函数关系;偏载作用下,混凝土中心受压峰值应力高于偏心约束受压,偏心约束受压峰值应力高于偏心边角受压。研究结果较好地说明了混凝土局部受压与偏载作用下的力学性能。
The hydraulic servo machine is used to test the local compressive and eccentric mechanical behaviors of normal concrete.Four loading conditions with different loading areas and six different partial load positions are set up to obtain the failure morphology and stress-strain curve of concrete specimens.The peak stress and peak strain of the stress-strain curve are extracted.The mechanical properties of concrete with different loading area and partial loading position are compared.The main conclusions are as follows:The peak stress and elastic modulus of concrete with different loading area decrease with the decrease of loading area The peak stress decreases with the increasing of the peak load,and the peak stress is a function of the area under loading.Under the partial load,the peak compressive stress of the concrete center is higher than that of the eccentric constraint and the peak stress of the eccentric constraint is higher than Eccentric corner compression.The results of the study better illustrate the mechanical properties of concrete under local compression and partial load.
作者
倪洪将
余振鹏
谢兴华
NI Hongjiang;YU Zhenpeng;XIE Xinghua(Department of Civil Engineering,Nanjing Technical Vocational College,Nanjing 210019,China;School of Transportation,Southeast University,Nanjing 210096,China;Hydraulic Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China)
出处
《混凝土》
CAS
北大核心
2018年第12期44-47,共4页
Concrete
基金
国家重点研发计划项目(2016YFC0401704)
国家自然科学基金重点项目(51539006)
关键词
普通混凝土
局部受压
偏心受压
力学性能
试验研究
ordinary concrete
local compression
eccentric compression
mechanical properties
experimental study
