鋼管混凝土短柱軸心受壓承載力與鋼管作用研究
江棗，錢稼茹
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（清華大學(xué)結(jié)構(gòu)工程與振動教育部重點(diǎn)實(shí)驗室，北京 100084）［摘要］為研究鋼管混凝土短柱軸心受壓承載力與鋼管的作用，通過理論分析，建立了鋼管約束承載力提高系數(shù)λ與套箍指標(biāo)、鋼管縱向應(yīng)力和環(huán)向應(yīng)力的關(guān)系。通過對124根軸心受壓鋼管混凝土短柱試驗結(jié)果的分析，建立了λ與套箍指標(biāo)和鋼管屈服強(qiáng)度的關(guān)系式，提出了引入λ的鋼管混凝土短柱軸心受壓承載力計算公式。公式反映了鋼管的直接承載作用和約束作用的大小，計算結(jié)果與試驗結(jié)果符合良好。［關(guān)鍵詞］鋼管混凝土短柱；軸心受壓承載力；鋼管作用；鋼管約束承載力提高系數(shù)Study on compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columnsJiang Zao, Qian Jiaru（Key Laboratory for Structure Safety and Durability of Education Ministry, Tsinghua University, Beijing 100084, China）Abstract:To study the compressive strength and steel tube functions of centrally loaded short concrete filled-steel tube columns, the relationship between the strength enhancement factor λ-due to steel tube confinement, the longitudinal stress and ring stress of steel tube was established by theoretical analysis. By analysis of the test results of 124 short concrete filled-steel tube columns subjected to centric axial compressive loads, the relationship betweenλand the confinement index and yield strength of steel tube is established and a formula for calculating the centric compressive strength of short concrete filled-steel tube columns is proposed. The factor λis introduced in the formula and the function of steel tube is reflected. The calculating results have good agreement with the test results.Keywords:short concrete filled-steel tube column; centric axial compressive strength; steel tube function; strength enhancement factor; steel tube confinement國家自然科學(xué)基金重大研究計劃重點(diǎn)項目（90815025）；北京市科技計劃重點(diǎn)項目(D09050600370000)；北京市教委科技計劃重點(diǎn)項目(KE200910005008)。作者簡介：江棗，博士，Email：jiang-z05@mails.tsinghua.edu.cn。參考文獻(xiàn)［1］蔡紹懷. 現(xiàn)代鋼管混凝土結(jié)構(gòu)［M］. 北京：人民交通出版社，2007.［2］гвзозцев A A.極限平衡法的結(jié)構(gòu)承載能力的計算［M］.袁文柏，譯.北京：中國建筑工業(yè)出版社，1958.［3］CECS28:90鋼管混凝土結(jié)構(gòu)設(shè)計與施工規(guī)程［S］. 北京: 中國計劃出版社, 1992.［4］鐘善桐. 鋼管混凝土統(tǒng)一理論—研究與應(yīng)用［M］.北京：清華大學(xué)出版社, 2006.［5］DL/T5085—1999鋼混凝土組合結(jié)構(gòu)設(shè)計規(guī)程［S］. 北京: 中國電力出版社, 1999.［6］JCJ01—89鋼管混凝土設(shè)計與施工規(guī)程［S］. 上海: 同濟(jì)大學(xué)出版社，1992.［7］KENJI SAKINO, HIROYUKI NAKAHARA. Behavior of centrally loaded concrete-filled steel-tube short columns［J］. Journal of Structural Engineering, 2004, 130(2): 180-188.［8］王力尚, 錢稼茹. 鋼管高強(qiáng)混凝土應(yīng)力應(yīng)變?nèi)€試驗研究［J］. 建筑結(jié)構(gòu), 2004, 34(1): 11-12, 19.［9］湯關(guān)祚,招炳泉, 竺惠仙, 等. 鋼管混凝土基本力學(xué)性能的研究［J］. 建筑結(jié)構(gòu)學(xué)報, 1982, 3(1): 13-31.［10］蔡紹懷,焦占拴. 鋼管混凝土短柱的基本性能和強(qiáng)度計算［J］. 建筑結(jié)構(gòu)學(xué)報,1984,5(6): 13-29.［11］顧維平,蔡紹懷, 馮文林. 鋼管高強(qiáng)混凝土的性
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