竹材再生混凝土加固RC柱的轴压试验研究  

Axial Compressive Experimental Research on RC Columns Strengthened by Recycled Concrete Jacketing with Bamboo

作　　者：陈溪 许清风 陈玲珠 冷予冰 CHEN Xi;XU Qingfeng;CHEN Lingzhu;LENG Yubing(Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences,Shanghai 200032,China)

机构地区：[1]上海市建筑科学研究院,上海市工程结构安全重点实验室,上海200032

出　　处：《结构工程师》2018年第5期113-121,共9页Structural Engineers

基　　金：“十三五”国家重点研发计划课题(2016YFC0701300)

摘　　要：竹材和再生混凝土均是优秀的绿色建材,且越来越多地应用于建筑行业,但在结构加固方面的研究仍非常匮乏。本文为研究用竹材和再生混凝土代替传统的钢筋混凝土在增大截面法加固混凝土柱中的加固效果,设计了2根未加固的对比柱和5根增大截面法加固柱并开展了轴压试验研究。试验结果表明:竹材再生混凝土加固RC柱可以显著提高柱体的受压承载力;同时会导致混凝土柱的延性系数略为降低,随着配筋率和配箍率增加降低幅度变小。利用VIC-3D非接触全场应变测量系统量测了试验过程中柱体表面的应变变化,测试结果能很好地预测加固柱的竖向裂缝开展。本文提出了加固柱体的受压承载力计算方法,计算结果与试验结果吻合较好。Bamboo and recycled concrete are both excellent green building materials and have been gradually applied in construction industry.However,little research on strengthening structures using bamboo and recycled concrete has been carried out.In this paper,in order to investigate the strengthening effect of replacing reinforce concrete with bamboo and recycled concrete in column jacketing,2 unstrengthened control columns and 5 columns strengthened by jacketing were designed to be tested under uniaxial loading.Experimental results indicated that columns strengthened with recycled concrete and bamboo exhibited higher loading capacity.Strengthened specimens also exhibited lower ductility,but the decreasing magnitude can be reduced by higher reinforcement ratio of longitudinal bamboo bars and bamboo stirrups.A non-contact full-field strain measurement system as known as VIC-3D was used to measure the change of strain field on one side of the specimens,and the results could well predict the development of vertical cracks.The compression load equation was proposed,and the calculation results were in good accordance with the test results.

关 键 词：钢筋混凝土柱 增大截面法 竹材 再生混凝土 轴压 

分 类 号：TU375.3[建筑科学—结构工程]