RPC叠合简支梁受弯承载力分析  

Analysis of bending capacity of RPC composite simply supported beams

作　　者：曹霞[1] 杨振轩 张金丹 金奇志[1] CAO Xia;YANG Zhen-xuan;ZHANG Jin-dan;JIN Qi-zhi(Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin University of Technology,Guilin 541004,China;College of Architectural Engineering,Hexhou University,Hezhou 542899,China)

机构地区：[1]桂林理工大学广西建筑新能源与节能重点实验室,广西桂林541004 [2]贺州学院建筑工程学院,广西贺州542899

出　　处：《桂林理工大学学报》2020年第1期103-108,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51368013);广西壮族自治区北部湾绿色海工材料工程研究中心项目;广西高等学校高水平创新团队及卓越学者计划项目;广西高校中青年教师科研基础能力提升项目(2019KY0730)。

摘　　要：通过RPC叠合简支梁受弯试验,研究不同预制高度对试验梁正截面承载力的影响。结果表明:叠合面上下混凝土的应变符合后浇混凝土受压"应变滞后"现象;平截面假定对于RPC叠合梁同样适用;随着预制高度的减小,试件带裂缝受弯工作能力有所降低。考虑不同预制高度对受弯承载力的影响,推导了RPC叠合梁正截面受弯承载力的建议式;考察了活性粉末混凝土叠合梁的界限受压区高度和最大配筋率。Through bending test of RPC composite simply-supported beams, the influence of precast height on the bearing capacity of normal section of test beam was studied.The result shows that the strains of the concrete on the laminated surface and the concrete under the laminated surface conform to the phenomenon of "strain lag" of the post-poured concrete under compression.The flat section assumption is also applicable to RPC composite beams.With the decrease of the precast height, the crack bending capacity of the specimen decreases.From the influence of different precast heights on the flexural bearing capacity, a suggested formula for the flexural bearing capacity of the normal section of RPC composite beam was derived.The height of the limit compression zone and the maximum reinforcement ratio of the composite beams of reactive powder concrete were investigated.

关 键 词：活性粉末混凝土 叠合梁 受弯承载力 

分 类 号：TU375.1[建筑科学—结构工程]