型钢混凝土空腹桁架连体结构研究应用——深圳大学科技楼连体结构解析

Study on steel reinforced concrete Vierendeel portal structure ——Portal structure design of Shenzhen University Science and Technology Building

本文结合实际工程,对型钢混凝土空腹桁架连体结构进行了研究。通过三种连体结构动力性能的对比分析,验证了空腹桁架结构具有良好的抗震性能,有利于减缓连体结构引起的刚度突变、质量集中和支承结构的应力集中,有利于提高连体结构的延性。同时,本文研究了楼盖刚度和型钢混凝土长期刚度退化对连体结构受力变形的影响,提出了型钢混凝土空腹桁架这一新型桁架节点设计构造措施及控制施工工艺程序改善结构受力的措施。

For portal structure of Shenzhen University Science and Technology Building, three schemes were studied in this paper, which were Vierendeel truss, lower transfer beam and upper suspension beam respectively. The conclusion shows that the Vierendeel portal structure has better aseismic performances as it is beneficial for smoothing the sudden change of stiffness and mass concentration, and reducing high stress concentration in supports as well as enhancing the ductility of the portal structure. The influences of connected floor stiffness and long term stiffness degradation of SRC members on the whole portal structure were also investigated. The improved joint detail design, crack control design for SRC members, and special construction method for this new structure are put forward as well .