Abstract
ABSTRACTIn this paper, a steel beam insert RCS side joint specimen is designed, and the low-cycle reciprocating loading test has been studied by designing a similar form of side joint specimen. At the same time, the hysteretic curve, skeleton curve, ductility, energy consumption, stiffness, bearing capacity degradation, and other seismic performance indexes are studied. The test results show that the failure mode of the specimen under the low-cycle reciprocating loading is the failure of the steel beam plastic hinge, which conforms to the seismic conceptual design principle of “strong column and weak beam”. The hysteresis curve of the specimen is relatively full, and the equivalent viscous damping coefficient is higher than that of ordinary reinforced concrete joints, showing better ductility and energy dissipation capacity. On the basis of experiments, Combined with ABAQUS finite element software, the variables of five parameters including insert length of steel beam, width of steel beam end plate, height of beam, axial compression ratio and embedded carrier board are analyzed, and the influence of these factors on the seismic performance of joints is also researched. By the method of variable analysis, the optimum value of each parameter is provided, which provides a reference for joint design.
Highlights
In the 1980s, the United States developed a composite frame consisting of reinforced concrete column and steel beam, in short of RCS
It proposes a new style of plug-in RCS edge node, which adopts the structural form that the steel beam is directly inserted into the concrete column, and the hoop is inserted through the hole at the web of the steel beam for the placement of the column stirrup
The steel beam steel is made of Q345 steel and has a length of 1.9 meters, of which 0.3 meters are inserted into the reinforced concrete column, and the end of the cantilever end is 0.1 meter
Summary
In the 1980s, the United States developed a composite frame consisting of reinforced concrete column and steel beam, in short of RCS. This paper uses the research method combining experiment and finite element analysis, which is conducive to improving research efficiency In this paper, it proposes a new style of plug-in RCS edge node, which adopts the structural form that the steel beam is directly inserted into the concrete column, and the hoop is inserted through the hole at the web of the steel beam for the placement of the column stirrup. It proposes a new style of plug-in RCS edge node, which adopts the structural form that the steel beam is directly inserted into the concrete column, and the hoop is inserted through the hole at the web of the steel beam for the placement of the column stirrup The advantage of this node is that the structure is simple, the construction is convenient, and it has good mechanical performance according to the existing domestic engineering projects such as Meizhou World Merchants Cultural Center. The seismic performance of the nodes with such structures is tested and simulated in the study
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