免模短柱轴压力学性能试验  

Experiment on Mechanical Performance of Non-template Short Columns Under Axial Compression

作　　者：吴方伯[1] 胡柯 蒋文[1] 张高波 周绪红[1,2] WU Fang-bo;HU Ke;JIANG Wen;ZHANG Gao-bo;ZHOU Xu-hong(College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China;School of Civil Engineering, Chongqing University, Chongqing 400044, China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]重庆大学土木工程学院,重庆400044

出　　处：《建筑科学与工程学报》2019年第4期12-21,共10页Journal of Architecture and Civil Engineering

基　　金：国家重点研发计划项目(2016YFC0701308)

摘　　要：提出一种由预制混凝土模板和现浇钢筋混凝土组成的免模柱,预制混凝土模板在工厂批量生产,运输到施工现场进行拼装后形成预制混凝土模板体系,最后在核心区现浇混凝土形成免模柱。通过对4个免模短柱和1个现浇短柱进行轴压力学性能试验,考察了免模短柱施工工艺的可行性,研究了试验过程中预制混凝土模板与现浇钢筋混凝土的协同工作性能,对比分析了免模短柱与现浇短柱的裂缝开展过程、破坏形态和承载力,同时给出了一些免模短柱在设计和施工中的建议。结果表明:免模短柱施工工艺简单可行;预制混凝土模板与现浇钢筋混凝土协同工作性能表现良好;预制混凝土模板的强度没有被充分利用,一定程度上削弱了免模短柱的承载力,但影响有限;预留孔洞对免模短柱承载力的影响较小。A kind of non-template column that consisted of prefabricated concrete templates and cast-in-place reinforced concrete was proposed. Prefabricated concrete templates were manufactured in bulk in the factory,then transporting to the construction site to assemble and form prefabricated concrete templates system,and finally pouring concrete into the area to produce a non-template column.Through the experiment on mechanical performance of four nontemplate short columns and one cast-in-place short column under axial compression,the feasibility of construction technology of non-template short column was investigated.The collaborative performance between prefabricated concrete template and cast-in-place reinforced concrete in the process of experiment was studied.The cracks development process,the failure mode and the bearing capacity of non-template short columns and cast-in-place short column were comparatively analyzed.Meanwhile,some suggestions were put forward in the design and construction of non-template short column.The results show that the construction technology of the non-template short column is simple and feasible,and the collaborative performance between prefabricated concrete templates and cast-in-place reinforced concrete is good.The strength of prefabricated concrete template is not fully utilized,which weakens the bearing capacity of the non-template short column to some extent,but the influence is limited.The influence of the reserved holes on the bearing capacity of the non-template short column is negligible.

关 键 词：免模短柱 预制混凝土模板 轴压试验 力学性能 施工工艺 

分 类 号：TU375.3[建筑科学—结构工程]