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(1 衢州學(xué)院建筑工程學(xué)院, 衢州 324000; 2 浙江大學(xué)建筑設(shè)計研究院有限公司, 杭州 310027;3 浙江大學(xué)建筑工程學(xué)院, 杭州 310027)
摘要: 為研究橢圓鋼管混凝土柱的抗震性能,開展八根不同橢圓截面比的橢圓鋼管混凝土柱在恒定軸壓和單調(diào)及往復(fù)水平荷載下的擬靜力試驗. 并利用 OpenSEES 軟件建立了橢圓鋼管混凝土柱的纖維單元模型,分析了橢圓截面比、鋼管強度、混凝土強度、試件高度(長細比)、軸壓比等參數(shù)對橢圓鋼管混凝土柱抗震性能的影響. 研究結(jié)果表明:橢圓鋼管混凝土柱的水平荷載-位移滯回曲線較為飽滿,表明其具有良好的塑性變形能力和耗能能力;纖維單元模型能較為準確地預(yù)測橢圓鋼管混凝土柱的水平荷載-位移曲線;橢圓截面比、軸壓比和試件高度的增加,對橢圓鋼管混凝土柱的抗震性能有不利影響;鋼管強度的提高會導(dǎo)致橢圓鋼管混凝土柱的承載能力和耗能能力提高,但會導(dǎo)致其變形能力下降;混凝土強度的提高會導(dǎo)致橢圓鋼管混凝土柱承載能力提高,但對其耗能能力和變形能力均有不利影響.
關(guān)鍵詞: 橢圓鋼管混凝土柱; 抗震性能; 試驗研究; 纖維單元模型; 參數(shù)分析
中圖分類號:TU398+. 9 文獻標志碼:A 文章編號:1002-848X(2023)12-0022-08
DOI:10. 19701 / j. jzjg. LS210380
Research on seismic behavior of elliptical concrete-filled steel tube columns
XU Youwu1, ZHU Haochuan2,3, YAO Jian1
(1 College of Architecture Engineering, Quzhou University, Quzhou 324000, China; 2 The Architectural Design& Research Institute of Zhejiang University Co. , Ltd. , Hangzhou 310027, China; 3 College of Architecture Engineering,Zhejiang University, Hangzhou 310027, China)
Abstract: In order to study the seismic behavior of elliptical concrete-filled steel tube (ECFST) columns, pseudo statictest of 8 ECFST columns with different elliptic section ratio under constant axial compression and monotonic and cycliclateral loading. The fiber element model of ECFST columns was established by using OpenSEES software to study theinfluence of elliptic section ratio, steel tube strength, concrete strength, height( slenderness ratio) and axial compressionratio on the seismic performance of ECFST columns. The results show that the horizontal load-displacement hysteresiscurves of ECFST columns are relatively plump, which indicates that the columns have good plastic deformation and energydissipation capacity. The fiber element model can accurately predict the horizontal load-displacement curve of ECFSTcolumns. The increase of elliptic section ratio, axial compression ratio and slenderness ratio has an adverse effect on theseismic behavior of ECFST columns. The increase of steel tube strength leads to the increase of bearing capacity and energydissipation capacity of ECFST columns, but leads to the decrease of deformation capacity. The increase in concrete strengthleads to the increase in bearing capacity of ECFST columns, but the decrease in energy dissipation capacity anddeformability.
Keywords:elliptical concrete-filled steel tube column; seismic behavior; experimental study; fiber element model;parametric analysis
∗浙江省自然科學(xué)基金項目(LY18E080014).
第一作者:許友武,博士,講師,主要從事鋼結(jié)構(gòu)、復(fù)材-鋼-混凝土組合結(jié)構(gòu)教學(xué)與研究工作,Email:xuyouwu@ zju. edu. cn.
[引用本文] 許友武,朱浩川,姚諫. 橢圓鋼管混凝土柱抗震性能研究[ J]. 建筑結(jié)構(gòu),2023,53(12):22-29. XUYouwu,ZHU Haochuan,YAO Jian. Research on seismic behavior of elliptical concrete-filled steel tube columns [ J].Building Structure,2023,53(12):22-29.
