介绍了两种适用于多高层结构的新型装配式钢框架结构体系,一种是美国的Conxtech Space Frame System(简称Conxtech钢框架体系),另一种是我国的空腹梁支撑钢框架结构体系。对两种结构体系的组成与技术特点进行了详细分析,并从梁柱连接、...介绍了两种适用于多高层结构的新型装配式钢框架结构体系,一种是美国的Conxtech Space Frame System(简称Conxtech钢框架体系),另一种是我国的空腹梁支撑钢框架结构体系。对两种结构体系的组成与技术特点进行了详细分析,并从梁柱连接、楼盖形式、装配工艺等方面对两种体系进行分析比较,指出Conxtech钢框架体系的技术成熟,但整体工业化程度不如空腹梁支撑钢框架结构体系,两种体系均有优势,对同类型结构体系的开发研究具有参考价值。展开更多
An experimental investigation was conducted to study the performance of precast beam-column concrete connections using T-section steel inserts into the concrete beam and joint core,under reversed cyclic loading.Six 2/...An experimental investigation was conducted to study the performance of precast beam-column concrete connections using T-section steel inserts into the concrete beam and joint core,under reversed cyclic loading.Six 2/3-scale interior beam-column subassemblies,one monolithic concrete specimen and five precast concrete specimens were tested.One precast specimen was a simple connection for a gravity load resistant design.Other precast specimens were developed with different attributes to improve their seismic performance.The test results showed that the performance of the monolithic specimen M1 represented ductile seismic behavior.Failure of columns and joints could be prevented,and the failure of the frame occurred at the flexural plastic hinge formation at the beam ends,close to the column faces.For the precast specimens,the splitting crack along the longitudinal lapped splice was a major failure.The precast P5 specimen with double steel T-section inserts showed better seismic performance compared to the other precast models.However,the dowel bars connected to the steel inserts were too short to develop a bond.The design of the precast concrete beams with lap splice is needed for longer lap lengths and should be done at the beam mid span or at the low flexural stress region.展开更多
文摘介绍了两种适用于多高层结构的新型装配式钢框架结构体系,一种是美国的Conxtech Space Frame System(简称Conxtech钢框架体系),另一种是我国的空腹梁支撑钢框架结构体系。对两种结构体系的组成与技术特点进行了详细分析,并从梁柱连接、楼盖形式、装配工艺等方面对两种体系进行分析比较,指出Conxtech钢框架体系的技术成熟,但整体工业化程度不如空腹梁支撑钢框架结构体系,两种体系均有优势,对同类型结构体系的开发研究具有参考价值。
文摘An experimental investigation was conducted to study the performance of precast beam-column concrete connections using T-section steel inserts into the concrete beam and joint core,under reversed cyclic loading.Six 2/3-scale interior beam-column subassemblies,one monolithic concrete specimen and five precast concrete specimens were tested.One precast specimen was a simple connection for a gravity load resistant design.Other precast specimens were developed with different attributes to improve their seismic performance.The test results showed that the performance of the monolithic specimen M1 represented ductile seismic behavior.Failure of columns and joints could be prevented,and the failure of the frame occurred at the flexural plastic hinge formation at the beam ends,close to the column faces.For the precast specimens,the splitting crack along the longitudinal lapped splice was a major failure.The precast P5 specimen with double steel T-section inserts showed better seismic performance compared to the other precast models.However,the dowel bars connected to the steel inserts were too short to develop a bond.The design of the precast concrete beams with lap splice is needed for longer lap lengths and should be done at the beam mid span or at the low flexural stress region.
