汶川方钢管混凝土组合异形柱结构抗震性能分析

Study on seismic performance of special-shaped column composed of concrete-filled square steel tubes( SCFST) structure in Wenchuan

汶川县映秀镇渔子溪村241户民居灾后重建项目中采用的方钢管混凝土组合异形柱结构是一种新型结构体系。本文介绍了方钢管混凝土组合异形柱结构在汶川灾后重建工程中的应用情况,采用振型分解反应谱法和Pushover分析法,对异形柱结构在多遇地震和罕遇地震下的承载能力、变形能力及屈服机制进行分析。结果表明,方钢管混凝土组合异形柱结构在多遇地震和罕遇地震下均有较好的抗震性能,作为一种绿色建筑形式,在地震多发区和村镇地区有较好的应用前景。

Special-shaped column composed of concrete-filled square steel tubes( SCFST) structure which applied to post-disaster reconstruction in Wenchuan county after 5. 12 earthquake is a new type of structural system. A brief introduction of the application of SCFST structure was provided. Load bearing capacity,deformation capacity and yield mechanism of SCFST under frequent and rare earthquake were analyzed using response spectrum modal analysis method as well as Pushover method. Results have shown that,SCFST structure has preferable earthquake resistant performance under both frequent and rare earthquake conditions. Further,as a kind of green building,SCFST structure should have good application prospect in the future as it widely applied to earthquake-prone zones and remote rural areas in China.