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(1 天津大學(xué)建筑工程學(xué)院, 天津 300072; 2 天津大學(xué)建筑設(shè)計(jì)規(guī)劃研究總院有限公司, 天津300073; 3 北京中鐵諾德房地產(chǎn)開發(fā)有限公司, 北京 100071)

摘要: 為研究新型鋼筋桁架纖維水泥疊合板的受彎性能,對(duì) 3 塊不同參數(shù)的疊合板試件進(jìn)行靜力加載試驗(yàn),研究了施工階段疊合板骨架體系的受力及變形特征,分析了使用階段不同配筋形式試件的破壞形態(tài)、荷載?應(yīng)變關(guān)系、承載力以及撓度變化. 試驗(yàn)結(jié)果表明,施工階段疊合板骨架自身剛度良好,可免設(shè)或少設(shè)臨時(shí)支撐;使用階段橫向分布筋能夠約束混凝土裂縫發(fā)展及疊合面粘結(jié)滑移,使纖維水泥板和混凝土板共同受力,提高了構(gòu)件開裂、屈服及極限荷載;纖維水泥板在各階段能有效承擔(dān)和傳遞荷載,提高樓板整體剛度和承載能力;拼縫截面作為鋼筋屈曲和混凝土最先開裂的薄弱處,應(yīng)設(shè)置附加鋼筋等構(gòu)造措施.

關(guān)鍵詞: 鋼筋桁架纖維水泥疊合板; 配筋形式; 受彎性能; 混凝土裂縫; 粘結(jié)滑移

中圖分類號(hào):TU375. 2 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)16?0074?05

DOI:10. 19701 / j. jzjg. LS202031

Experimental study on flexural performance of reinforced truss fiber cement composite slabs

AN Haiyu1,2, ZHENG Zishuo1, CAO Yu2, LI Xiaofeng3, WANG Wei3

(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Tianjin University Research Instituteof Architectural Design & Urban Planning Co. , Ltd. , Tianjin 300073, China; 3 Beijing China Railway Nord RealEstate Development Co. , Ltd. , Beijing 100071, China)

Abstract: In order to study the flexural performance of the new reinforced truss fiber cement composite slab, threecomposite slab specimens with different parameters were subjected to static loading tests, the mechanical and deformationcharacteristics of the composite slab frame system were investigated during the construction stage, and the failure pattern,load?strain relationship, bearing capacity and deflection changes of specimens with different reinforcement types wereanalyzed during the service stage. The test results show that the rigidity of the truss slab frame itself is good during theconstruction stage, and temporary supports can be omitted or lessened. The transverse distribution of reinforcement duringthe service stage can restrain the development of concrete cracks and the bonding and slippage of the stacked surface, whichmakes the fiber cement board and the concrete plate jointly stressed and improves the cracking, yielding and ultimate loadof the component. The fiber cement board can effectively bear and transmit the load in each phase and improve the overallrigidity and bearing capacity of the slab. The joint section is a weak point where the reinforcement buckles and the concretefirst cracks and it should be reinforced with additional reinforcement and other structural measures.

Keywords:reinforced truss fiber cement composite slab; reinforcement form; flexural performance; concrete crack; bond slip

第一作者:安海玉,碩士,研究員,一級(jí)注冊(cè)結(jié)構(gòu)工程師,碩士生導(dǎo)師,主要從事復(fù)雜結(jié)構(gòu)分析及減隔震設(shè)計(jì)工作,Email:ahy0036@ sina. com.

[引用本文] 安海玉,鄭子碩,曹宇,等. 鋼筋桁架纖維水泥疊合板受彎性能試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2022,52(16):74?78,131. AN Haiyu,ZHENG Zishuo,CAO Yu,et al. Experimental study on flexural performance of reinforcedtruss fiber cement composite slabs[J]. Building Structure,2022,52(16):74?78,131.