Seismic Analysis of Steel Solid Web Girder-RC Tubular Column Hybrid Structure

This paper aims to investigate the seismic performance of a novel type of steel–concrete hybrid supporting structure consisting of reinforced concrete (RC) tubular columns, steel solid web girder platform, and A-shaped steel frames. It is typically used to house air-cooled condensers (ACC) in thermal power plants (TPPs). First, the finite-element (FE) model was implemented in ABAQUS and the simulation approaches were validated by pseudo-dynamic test results of a scaled steel-concrete hybrid supporting structure. Then, the elasto-plastic time-history analysis of the steel solid web girder-RC tubular column hybrid structure was conducted. The El Centro (NS) record was scaled to peak ground acceleration (PGA) of 0.07, 0.20, 0.40 and 0.62 g to reflect the frequent, basic, rare, and very rare earthquakes. The dynamic characteristics, base shear force, lateral deformation performance, stiffness deterioration, and damage evolution characteristics were analyzed. The numerical results showed that the first vibration mode of this hybrid structure is torsion, due to its small torsional stiffness and the nonuniform distribution characteristics of stiffness and mass in the vertical direction; the lateral deformation shape is shear mode; and the damage mainly occurred on the RC tubular columns, while the steel components did not yield under severe earthquakes. In general, the overall seismic performance of the steel solid web girder-RC tubular column hybrid structural system could meet the seismic design requirements with respect to the high-intensity earthquakes.

[1]  Guoliang Bai,et al.  Pseudo-Dynamic and Quasi-Static Testing of an Irregular Steel Concrete Composite Frame with Wing Walls , 2016 .

[2]  B Wang.  RESEARCH ON MECHANICAL PROPERTIES OF ABNORMAL SRC JOINTS WITH SHORT-LIMB SHEAR WALLS , 2014 .

[3]  Alessandro Zona,et al.  An innovative seismic-resistant steel frame with reinforced concrete infill walls , 2017 .

[4]  Roberto Nascimbene,et al.  Numerical Model of a Reinforced Concrete Building: Earthquake Analysis and Experimental Validation , 2015 .

[5]  Rosario Montuori,et al.  Smart and simple design of seismic resistant reinforced concrete frame , 2017 .

[6]  Rosario Montuori,et al.  The use of steel rbs to increase ductility of wooden beams , 2018, Engineering Structures.

[7]  Gregory G. Deierlein,et al.  Overview of U.S.–Japan Research on the Seismic Design of Composite Reinforced Concrete and Steel Moment Frame Structures , 2004 .

[8]  Hugues Somja,et al.  Behavior of a new shear connector for U-shaped steel-concrete hybrid beams , 2018, Journal of Constructional Steel Research.

[9]  Bo Wang,et al.  Numerical Study on the Seismic Performance of a Steel–Concrete Hybrid Supporting Structure in Thermal Power Plants , 2018 .

[10]  E. Brunesi,et al.  Extreme response of reinforced concrete buildings through fiber force-based finite element analysis , 2014 .

[11]  Li Hongxing.  Study on seismic behavior of a steel truss-reinforced concrete column structure , 2011 .

[12]  Abbas Sivandi-Pour,et al.  Uniform Damping Ratio For Non-Classically Damped Hybrid Steel Concrete Structures , 2016 .

[13]  Vincenzo Piluso,et al.  Moment frames – concentrically braced frames dual systems: analysis of different design criteria , 2016 .

[14]  F. Sidoroff,et al.  Description of Anisotropic Damage Application to Elasticity , 1981 .

[15]  R. Nascimbene,et al.  Towards Non–Standard Numerical Modeling of Thin-Shell Structures: Geometrically Linear Formulation , 2014 .

[16]  Mohammed Hjiaj,et al.  Hybrid RC-steel members under bending and shear: Experimental investigation and design model , 2017 .

[17]  R. Nascimbene,et al.  An Arbitrary Cross Section, Locking Free Shear-flexible Curved Beam Finite Element , 2013 .

[18]  W. Salvatore,et al.  Innovative hybrid and composite steel-concrete structural solutions for building in seismic area , 2015 .

[19]  Bo Wang,et al.  Experimental Investigation on Seismic Behavior of Steel Truss-RC Column Hybrid Structure with Steel Diagonal Braces , 2018 .

[20]  Li Xiaowen.  Model test on behavior of direct air cooled condenser support platform under service load and earthquake action , 2008 .

[21]  Jerome F. Hajjar,et al.  Composite steel and concrete structural systems for seismic engineering , 2002 .