高层型钢混凝土底部大空间转换层结构性能研究

提出在底部中大开间（或小跨重载）的多高层建筑中，优先采用型钢混凝土转换粱及其底部大开间的型钢混凝土结构体系，对底部开间较大的高层、超高层建筑，可采用型钢混凝土结构及预应力型钢混凝土空腹桁架转换结构体系。为此，进行了型钢混凝土底部大开间梁式托柱转换层结构，与普通钢筋混凝土相应结构模型的竖向荷载和低周反复水平荷载对比试验，以及部分构件采用型钢混凝土的预应力型钢叠层空腹桁架转换结构与普通钢筋混凝土相应结构模型的竖向荷载和拟动力对比试验，提出了型钢混凝土底部大开问及转换层结构体系的部分设计建议，取得了卓有成效的成果。本文研究成果成功地应用于三个实际工程，取得了显著的社会和经济效益。

Research on the Performance of High rise Steel Reinforced Concrete Bottom Large Space Transfer Story Structure

It is proposed that in the multi-storey building with medium and large opening at the bottom (or small-span heavy load), priority should be given to the use of profiled concrete conversion beams and its profiled concrete structural system with large opening at the bottom, and for the high-rise and ultra-high-rise buildings with large opening at the bottom, the profiled concrete structure and prestressed profiled concrete hollow web truss conversion structural system can be used. To this end, the vertical load and low peripheral repeated horizontal load comparison tests of beam-type joist conversion structure with large bottom opening of section steel concrete and the corresponding structural model of ordinary reinforced concrete, as well as the vertical load and proposed dynamic comparison tests of pre-stressed section steel stacked hollow truss conversion structure with section steel concrete and the corresponding structural model of ordinary reinforced concrete are carried out, and some design suggestions for the structural system of section steel concrete bottom opening and conversion floor are put forward. Part of the design suggestions for the structural system of the conversion floor have been made, and fruitful results have been achieved. The research results of this paper have been successfully applied to three actual projects, which have achieved remarkable social and economic benefits.