Time filter

Source Type

Lee S.,Guangzhou Scientific Computing Consultants Co. | Wang D.,East China Architectural Design Institute Co. | Liao Y.,Guangzhou Scientific Computing Consultants Co. | Mathias N.,Front Street Consulting
Structures Congress 2010 | Year: 2010

The Jinta Tower is a 75-story building located in Tianjin, China, with slender steel plate shear walls (SPSW) used as the primary lateral load resisting system. Construction detail, method and schedule constraints result in the steel plates being subject to gravity loads. Chinese codes require that steel plates not buckle in frequent (50 year) seismic events in addition to the typical performance requirements in the moderate (475 year) and rare (2000 year) seismic events. To address these constraints, a buckling restrained slender steel plate shear wall system - SPSWs with vertical stiffeners to enhance gravity load carrying capacity of the plates and delay buckling is developed. The approach for stiffener design included use of buckling and interaction formulae as well as pushover, parametric and sensitivity studies. The rare earthquake performance was studied and prescribed performances were verified by nonlinear dynamic analyses. The SPSWs were finely meshed to a 0.1m x 0.1m grid incorporating geometric and material nonlinearities. Geometric imperfections were also taken into account. Other structural members such as concrete filled tube columns, floor slabs, steel beams/braces and stiffeners were also meshed to a similar size to accurately model their nonlinearities. A ten million degree of freedom nonlinear model of the structure was created for three 40s earthquake time history analyses on the ABAQUS parallel platform. Despite the high initial gravity stresses, the stiffeners were demonstrated to push the inception of plate buckling out beyond the frequent events and provide great ductility and ability to absorb the earthquake input energy through significant tension field action in the larger events. © 2010 American Society of Civil Engineers.

Huang Z.,RBS Architecture Engineer Design Associate | Huang Z.,Guangzhou Scientific Computing Consultants Co. | Liao Y.,RBS Architecture Engineer Design Associate | Liao Y.,Guangzhou Scientific Computing Consultants Co. | And 2 more authors.
Jianzhu Jiegou Xuebao/Journal of Building Structures | Year: 2012

Guangzhou East Tower is a 530 meters high complex structure. Its lateral foce resisting system consists of composite steel concrete shear wall core, perimeter giant frame and belt truss. The explicit method was implemented to integrate the dynamic equations. ABAQUS and BEPTA were used to perform the elasto-plastic time-history analysis under rare earthquakes. The seismic performance of the structure was studied. By strengthening the fragile shear wall with steel plate, strengthening the irregular shear wall hole with steel truss, and connecting the belt truss and shear wall, the maximum inter-story drift could conform to relevant code requirements. The first story shear wall and perimeter giant frame column could resist the tensile force. The results show that the main load-bearing constructional members do not yield. The structure has sufficient seismic capacity.

Loading Guangzhou Scientific Computing Consultants Co. collaborators
Loading Guangzhou Scientific Computing Consultants Co. collaborators