方鋼管混凝土軸心受壓短構(gòu)件承載能力計算
仵建斌1，趙鴻鐵，薛建陽1，葛鴻鵬，康希良1
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(1 西安建筑科技大學(xué)土木工程學(xué)院，710055；2 中國建筑西北設(shè)計研究院，西安710003）［提要］對方鋼管混凝土軸心受壓短構(gòu)件的受力機(jī)理進(jìn)行了理論分析，提出了此類構(gòu)件承載力計算的基本假定。采用極限平衡法，推導(dǎo)出鋼管屈服時的構(gòu)件極限承載力的解析計算式。對國內(nèi)外已有試驗進(jìn)行對比研究，并將解析分析結(jié)果與試驗數(shù)據(jù)比較，證明了提出的解析計算式的正確性。［關(guān)鍵詞］方鋼管混凝土；極限平衡法；約束效應(yīng)系數(shù)；極限承載力Load Carrying Capacity of Concrete Filled Square Steel Tubes Under Axial Compression/Wu Jianbin1,Zhao Hongtie1,Xue Jianyang1,Ge Hongpeng2,Kang Xiliang1(1 College of Civil Engineering, Xi"an Univ. of Arch. & Tech., Xi"an 710055, China; 2 China Northwest Building Design Research Institute, Xi"an 710003, China)Abstract:A theoretical analysis is carried out for the load carrying capacity of the axially compressed concrete filled square steel tube. Several basic assumptions on the overall mechanical property of this structure are proposed. The equation is derived for estimating the strength of the system when the steel tube yields through ultimate equilibrium method. The comparison of the experimental data and the results from the proposed equations shows good consistency.Keywords:concrete filled square steel tubes; ultimate equilibrium method; confining parameter; ultimate bearing capacity*國家自然科學(xué)基金資助項目(50478044)。
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