【摘要】 本文提出了一种更适合抗震设计的新型钢管混凝土体系———约束钢管混凝土柱体系。它建立在清楚的力学概念基础上,其设计着眼于在可能出现塑性铰的部位附加横向约束以控制钢管的局部屈曲和更有效地约束混凝土。这一新型钢管混凝土柱体系兼具了钢管混凝土及套管混凝土柱两者的优点,克服了传统钢管混凝土柱的抗震缺陷,为抗震地区的高层结构和桥梁设计提供了理想的选择。在本研究的第一阶段,作者们对FRP约束的圆钢管柱和钢板约束的方钢管柱进行了模拟地震力的加载试验。其结果验证了约束钢管混凝土柱的良好抗震性能。更多还原

【Abstract】 This paper introduces an innovative concrete filled steel tubular (CFT) column system, named as confined CFT or CCFT, for improved seismic design of steel and concrete composite structures. The CCFT column system combines the advantages of conventional CFT column and tubed column systems and overcomes the defects in earthquake resistant behavior of the conventional concrete filled steel tubes. The design concept is based on fundamental mechanics, aimed at controlling the local buckling of the steel tube and confining the concrete in the potential plastic hinge regions of a CFT column. To achieve this, several efficient details of transverse confinement were proposed. In this study, carbon fiber reinforced plastic (CFRP) and welded steel plates as additional confinement for CCFT columns were examined experimentally. From the results of simulated seismic loading tests, it is validated that the new type of CFT column system can provide excellent seismic performance.更多还原