根据动力荷载下结构与其内部设备相互作用的特点,提出了将建筑物作为主结构,其内部设备作为子结构的互动减震体系。用通用程序 Super SAP95,分析了在不同地震波激励下减震体系的动力响应,发现与原结构相比,减震体系各楼层的最大位移及...根据动力荷载下结构与其内部设备相互作用的特点,提出了将建筑物作为主结构,其内部设备作为子结构的互动减震体系。用通用程序 Super SAP95,分析了在不同地震波激励下减震体系的动力响应,发现与原结构相比,减震体系各楼层的最大位移及楼层剪力均有所降低,减震幅度可达 10%～40%。分析表明该体系的减震效果是明显的,值得推广应用。展开更多
In order to study the dynamic response of concrete-filled steel tube(CFST) columns against blast loads,a simplified model is established utilizing the equivalent single-degree-of-freedom(SDOF) method,which considers t...In order to study the dynamic response of concrete-filled steel tube(CFST) columns against blast loads,a simplified model is established utilizing the equivalent single-degree-of-freedom(SDOF) method,which considers the non-uniform distribution of blast loads on real column and the axial load-bending moment(P-M) interaction of CFST columns.Results of the SDOF analysis compare well with the experimental data reported in open literature and the values from finite element modeling(FEM) using the program LS-DYNA.Further comparisons between the results of SDOF and FEM analysis show that the proposed model is effective to predict the dynamic response of CFST columns with different blast conditions and column details.Also,it is found that the maximum responses of the columns are overestimated when ignoring the non-uniformity of blast loads,and that neglecting the effect of P-M interaction underestimates the maximum response of the columns with large axial load ratio against close range blast.The proposed SDOF model can be used in the design of the blast-loaded CFST columns.展开更多
文摘根据动力荷载下结构与其内部设备相互作用的特点,提出了将建筑物作为主结构,其内部设备作为子结构的互动减震体系。用通用程序 Super SAP95,分析了在不同地震波激励下减震体系的动力响应,发现与原结构相比,减震体系各楼层的最大位移及楼层剪力均有所降低,减震幅度可达 10%～40%。分析表明该体系的减震效果是明显的,值得推广应用。
基金Project(KJZH14220)supported by the Achievement Transfer Program of Institutions of Higher Education in Chongqing,China
文摘In order to study the dynamic response of concrete-filled steel tube(CFST) columns against blast loads,a simplified model is established utilizing the equivalent single-degree-of-freedom(SDOF) method,which considers the non-uniform distribution of blast loads on real column and the axial load-bending moment(P-M) interaction of CFST columns.Results of the SDOF analysis compare well with the experimental data reported in open literature and the values from finite element modeling(FEM) using the program LS-DYNA.Further comparisons between the results of SDOF and FEM analysis show that the proposed model is effective to predict the dynamic response of CFST columns with different blast conditions and column details.Also,it is found that the maximum responses of the columns are overestimated when ignoring the non-uniformity of blast loads,and that neglecting the effect of P-M interaction underestimates the maximum response of the columns with large axial load ratio against close range blast.The proposed SDOF model can be used in the design of the blast-loaded CFST columns.
