Abstract
In this paper, a nonlinear finite element (FE) analysis of high-performance hybrid system (HPHS) beam-column connections is presented. The detailed experimental results of the ten half-scale hybrid connections with limited seismic detailing have been discussed in a different paper. However, due to the inherent complexity of HPHS beam-column joints and the unique features of the tested specimens, the experimental study was not comprehensive enough. The new connection (HPHS) detail suggested in this study is characterized by ductile connection, steel connectors, and engineered cementitious composite (ECC) which is a kind of high-performance fiber reinforced cement composite with multiple fine cracks (HPFRCCs). Therefore, in this paper, FE analysis results are compared with experimental results from the cycle tests of the two specimens (RC and PC) to assess model accuracy, and detailed model descriptions are presented, including the determination of stiffness and strength. The critical parameters influencing the joint’s behavior are the axial load on column, beam connection steel plate length, inner bolt stress contribution, and plastic hinge area.
Highlights
Precast concrete has not been used widely as a framing system for buildings located in several seismic regions
To verify the finite element model, the analytical results were compared with the experimental results. e specimens were modeled with a truss elements and the remaining plane stress 2D elements
Steel plates, which were used for the connection at the joint, extended inside the beam at one side and abutted with the column face on the other side. ese plates were simulated as 2D plane stress elements. ese elements were assigned with steel plate thickness and its material properties. e concrete on the front and rear side of these elements was neglected in the analysis as it was filled up after the connections were fastened
Summary
Precast concrete has not been used widely as a framing system for buildings located in several seismic regions. In practice, the behavior of precast connections is not well established and not fully understood to fulfill the requirements needed in the design and construction development of precast technology [1,2,3]. Current technology is widely available to satisfy the growing demand required of engineers to provide communities with superior levels of structural performance during an earthquake. The seismic demand imposed onto a structure (maximum displacements and accelerations) can be significantly reduced, thereby reducing material costs and construction time. In developing this new technology, design recommendations are required to ensure the technology is appropriately utilized
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