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(1 揚(yáng)州市建筑設(shè)計(jì)研究院有限公司, 揚(yáng)州 225007; 2 揚(yáng)州大學(xué)建筑科學(xué)與工程學(xué)院, 揚(yáng)州 225127)

摘要: 為研究軸壓比以及配鋼率對(duì)桁架式鋼骨混凝土框架節(jié)點(diǎn)受剪性能的影響,制作了 5 個(gè)核心區(qū)剪切破壞的桁架式鋼骨混凝土框架中節(jié)點(diǎn),研究不同軸壓比和用鋼量對(duì)節(jié)點(diǎn)極限承載力、抗震性能及破壞形態(tài)的影響. 基于有限元軟件 ABAQUS,對(duì) 5 個(gè)桁架式鋼骨混凝土框架節(jié)點(diǎn)模型開展了力學(xué)性能分析. 結(jié)果表明:所有構(gòu)件的破壞形態(tài)全部為核心區(qū)剪切破壞;提高軸壓比對(duì)于構(gòu)件的極限承載力有積極作用,但會(huì)使其耗能能力和延性降低;節(jié)點(diǎn)核心區(qū)配置交叉斜腹桿角鋼可提高構(gòu)件的極限承載能力以及抗震性能;通過分析參數(shù)可得,提高軸壓比以及混凝土抗壓強(qiáng)度、增加核心區(qū)交叉斜腹桿的尺寸并且提高其屈服強(qiáng)度都會(huì)提高節(jié)點(diǎn)的極限承載力;推導(dǎo)了桁架式鋼骨混凝土框架節(jié)點(diǎn)的抗剪承載力計(jì)算公式,經(jīng)驗(yàn)證計(jì)算值與實(shí)測值和模擬值相近,可為工程設(shè)計(jì)提供理論參考.關(guān)鍵詞: 桁架式鋼骨混凝土; 框架中節(jié)點(diǎn); 受剪性能; 抗剪承載力計(jì)算公式

中圖分類號(hào):TU375. 4 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)08-0105-08

DOI:10. 19701 / j. jzjg. LS210132

Experimental study on shear performance of truss steel reinforced concrete frame joints

YANG Xiaofeng1, LIU Yifei2, GE Wenjie2, QIAN Rui2, CAO Dafu2

(1 Yangzhou Architectural Design and Research Institute Co. , Ltd. , Yangzhou 225007, China; 2 Collegeof Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract: In order to study the influence of axial compression ratio and steel ratio on shear properties of truss steelreinforced concrete ( RC) frame joints, five truss steel RC frame joints occurred core shear failure were made. Theinfluence of different axial compression ratio and steel content on ultimate bearing capacity, seismic performance and failureprocess of the joints were studied. Based on the finite element software ABAQUS, the mechanical properties of truss steelRC frame joints were analyzed. The results show that all specimens occurred core shear failure. With the increase of axialcompression ratio, the ultimate bearing capacity increases, but the energy dissipation capacity and ductility decrease. Theenhancement of steel content in the core zone of joints can improve the ultimate bearing capacity of components, and theseismic performance also increases accordingly. The results of parameter analysis shows that the bearing capacity increaseswith the increase of axial compression ratio, compressive strength of concrete, size of diagonal web members in core areaand yield strength of steel. The calculation formula for shear bearing capacity of truss steel RC frame joints is alsoproposed. The predicted values are in good agreement with the tested and simulated values, which can be taken astheoretical reference for engineering design.

Keywords: truss steel reinforced concrete; frame inner joints; shear performance; calculation formula for shearbearing capacity

∗國家自然科學(xué)基金資助項(xiàng)目(51578478,51678514),江蘇省自然科學(xué)基金面上項(xiàng)目(BK20201436),中國博士后基金面上項(xiàng)目(2018M642335),揚(yáng)州市-揚(yáng)州大學(xué)市校合作共建科技創(chuàng)新平臺(tái)新型裝配式建筑結(jié)構(gòu)重點(diǎn)實(shí)驗(yàn)室開放課題(YZZP202201),江蘇高校“青藍(lán)工程”資助項(xiàng)目(蘇教師函[2020]10 號(hào)).

第一作者:楊曉峰,學(xué)士,高級(jí)工程師,主要從事民用建筑結(jié)構(gòu)設(shè)計(jì),Email:594023290@ qq. com.

[引用本文] 楊曉峰,劉逸飛,葛文杰,等. 桁架式鋼骨混凝土框架節(jié)點(diǎn)受剪性能試驗(yàn)研究[ J]. 建筑結(jié)構(gòu),2023,53(8):105-112,153. YANG Xiaofeng,LIU Yifei,GE Wenjie,et al. Experimental study on the shear performance of trusssteel reinforced concrete frame joints[J]. Building Structure,2023,53(8):105-112,153.