CAJ | 학술논문

在有限元计算结果得到既有试验结果验证的基础上，采用有限元法分析各参数对方中空夹层钢管混凝土压扭构件 T/Tu -N/Nu 相关曲线的影响。分析表明，长细比变化时对 T/Tu -N/Nu 相关曲线影响较显著，而内外钢管强度、混凝土强度、空心率、内管径厚比和名义含钢率变化时对其影响不明显。在此基础上，提出了方中空夹层钢管混凝土压扭构件承载力简化计算方程，将简化计算值与有限元计算值、试验值进行比较，吻合良好，可为工程设计提供参考。
재유한원계산결과득도기유시험결과험증적기출상，채용유한원법분석각삼수대방중공협층강관혼응토압뉴구건 T/Tu -N/Nu 상관곡선적영향。분석표명，장세비변화시대 T/Tu -N/Nu 상관곡선영향교현저，이내외강관강도、혼응토강도、공심솔、내관경후비화명의함강솔변화시대기영향불명현。재차기출상，제출료방중공협층강관혼응토압뉴구건승재력간화계산방정，장간화계산치여유한원계산치、시험치진행비교，문합량호，가위공정설계제공삼고。
Based on the existing experimental result verification by finite element calculation,this paper analyzed the influence of the parameters on the normalized T/Tu -N/Nu correlation curves of concrete-filled double-walled steel tube ( CFDST) members under compression and torsion. The results indicated that the slenderness ratio has a significant effect on T/Tu - N/Nu correlation curves,while the other parameters such as yield strength of outer or inner steel tube,concrete cube strength,hollow ratio, thickness ratio of inner steel tube and nominal steel ratio have little effect on the correlation curves. According to the results,this paper proposed the simplified calculation equation for the bearing capacity of CDFST members under combined compression and torsion and the simplified calculation results agree well with the experimental and test results calculated by the finite element method,which means the method presented in this paper could provide a good reference for engineering design.