中南大学学报（自然科学版）2024，Vol.55Issue(4)：1388-1405,18.DOI:10.11817/j.issn.1672-7207.2024.04.013
装配式混凝土墙板新型键槽接缝受剪性能研究
Study on shear behavior of a novel PC wallboard alveolar-type joint
摘要
Abstract
In order to study the interface shear behavior of a novel PC wallboard alveolar-type joint suitable for low multilayer structure,2 series of PC wallboard specimens(8 in total)with the novel joint were designed and fabricated,then monotonic shear loading test and finite element analysis(FEA)of the extended parameters were carried out.The effects of the main test parameters including axial compression ratio,materials,as well as the construction of the alveolar-type joint on interface shear behavior were discussed,respectively.Furthermore,the formula of shear bearing capacity was proposed,and the corresponding shear force-slip model of the novel joint interface was created.The results show that the axial compression ratio has a significant effect on the joint failure mode and shear bearing capacity,the crack development is more sufficient with the increase of axial compression ratio,and there exist local concrete spalling or even crushing.At the same time,the relationship between joint shear capacity and axial compression ratio is approximately linear.Improving the strength of the bonding surface mortar can greatly improve the shear bearing capacity of the joint.The shear bearing capacity of specimens with high-strength mortar increases by 57.2%compared with that of the ordinary mortar.Reasonable keyway structure can effectively improve the shear bearing capacity of the joint.Compared with the traditional straight joint,the shear bearing capacity of the specimens with a depth of 50 mm and inclined chamfering angle of 11.3° increases by 16.5%.The calculation results of shear bearing capacity obtained from the proposed formula are in good agreement with the test results.The proposed shear-slip model of the novel joint interface can predict the shear behavior of the joint correctly.关键词
装配式混凝土(PC)墙板/新型键槽接缝/单向推剪加载试验/数值分析/受剪承载力Key words
precast concrete(PC)wallboard/novel alveolar-type joint/monotonic shear loading test/finite element analysis(FEA)/shear bearing capacity分类
建筑与水利引用本文复制引用
罗小勇,邢民亮,肖扬,程俊峰,程茜..装配式混凝土墙板新型键槽接缝受剪性能研究[J].中南大学学报（自然科学版）,2024,55(4):1388-1405,18.基金项目
国家自然科学基金资助项目(52178179) （52178179）
湖南省重点研发项目(2023SK2014)(Project(52178179)supported by the National Natural Science Foundation of China （2023SK2014）
Project(2023SK2014)supported by the Key Research and Development Project of Hunan Province) （2023SK2014）
