Abstract
This paper presents the numerical investigation on the seismic performance of a steel–concrete hybrid structure consisting of reinforced concrete (RC) tubular columns and steel braced truss with A-shaped steel frames, which is a novel supporting structural system to house air-cooled condensers (ACC) in large-capacity thermal power plants (TPPs). First, the finite element (FE) modeling approach for this hybrid structure using the software ABAQUS was validated by a range of pseudo-dynamic tests (PDTs) performed on a 1/8-scaled sub-structure. The failure process, lateral displacement responses, changing rules of dynamic characteristic parameters and lateral stiffness with increase of peak ground acceleration (PGA) were presented here. Then, nonlinear time-history analysis of the prototype structure was carried out. The dynamic characteristics, base shear force, lateral deformation capacity, stiffness deterioration and damage characteristics were investigated. Despite the structural complexity and irregularity, both experimental and numerical results indicate that the overall seismic performance of this steel–concrete hybrid supporting structure meets the seismic design requirements with respect to the high-intensity earthquakes.
Highlights
In the past two decades, many studies on steel–concrete hybrid structures have been carried out [1,2,3]
0.62 g was added to further addition, considering the importance of the lifeline engineering, the ground motion with the peak ground acceleration (PGA) of investigate the seismic performance of the thisseismic hybrid performance structure under more severe earthquakes, 0.62 g was added to further investigate of this hybrid structure underwhich more is in accordance with the rare level to 9-degree seismic intensity severe earthquakes, which is inearthquake accordancehazard with the rarecorresponding earthquake hazard level corresponding to recommended by the
The experimental and numerical researches were conducted to investigate the seismic performance of a steel–concrete hybrid supporting structure consisting of reinforced concrete (RC) tubular columns and steel braced truss with A-shaped steel frames
Summary
In the past two decades, many studies on steel–concrete hybrid structures have been carried out [1,2,3]. RC tubular column-steel braced truss structure is a novel steel–concrete hybrid supporting structural system to house air-cooled condensers (ACC) in large-capacity thermal power plants (TPPs). Compared with the traditional supporting structure that consists of a series of A-shaped steel frames resting on a steel truss platform supported by an array of RC tubular columns, the novel supporting structure utilized steel diagonal braces to connect the steel truss and. Of a series of A-shaped steel frames resting on a steel truss platform supported by an array of RC tubular columns, the novel supporting structuresafety utilized steel diagonal braces to connect the steel columns so as to further upgrade the structural performance. As a type of special and complex industrial photos of aitspractical supporting structure steel diagonal braces. Resulting in the uneven distribution of stiffness and mass along the vertical direction
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