Seismic performance of RC frames with EPSC latticed concrete infill walls

Tang, Baizan; Chen, Su; Li, Xiaojun; Xiong, Lihong; Chen, Hua-Peng; Feng, Qingsong

doi:10.1016/j.engstruct.2019.109437

Cited by 11 publications

(4 citation statements)

References 18 publications

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“…Zhang et al [ 13 ] established a finite element model to investigate the effects of strain rates on the seismic responses of reinforced concrete structures with ABAQUS platform, and the numerical results were validated by the experimental data of the shaking table test. Tang et al [ 14 , 15 ] carried out shaking table tests and, in numerical studies on the seismic performance of reinforced concrete frames with latticed concrete infill walls, the simulated acceleration, displacement response, and tensive damage of the model structure have good agreement with the test records. Jiang et al [ 16 ] performed a numerical simulation to analyze the seismic performance of superimposed reinforced concrete shear wall, the distribution of concrete damage, steel reinforcement stress distribution, and hysteretic curves in the numerical simulation were basically consistent with the results of the pseudo-static test.…”

Section: Introductionmentioning

confidence: 97%

Seismic Response of Star-Type Grid Concrete Wall Structure by Numerical Modeling

et al. 2022

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Cement polystyrene shell mold (CPSM) grid concrete walls have been widely applied in the construction of low and mid-rise buildings with higher load-bearing and insulation properties. A star-type grid concrete wall was constructed based on the infill wall simplified to an equivalent diagonal bracing model. To investigate the seismic responses and behavior of a star-type grid concrete wall structure, an overall time-history numerical simulation was carried out in this paper. Typical results, including acceleration, deformation, hysteresis curve and failure pattern of this novel construction system, were interpreted. Results indicate that the star-type grid concrete wall structure has satisfactory seismic performance, including energy dissipation capacity. The structure has higher lateral stiffness and can work in an elastic state under major earthquakes. Accordingly, it is more sensitive to near-fault ground motion with higher frequency components. Meanwhile, the structural inter-story drift angle is less than the limit value of lighter damage when subjected to a super-major earthquake, and the structure presents shear deformation. The openings significantly affect the failure mode, the star-type grid concrete wall with a window (a small aspect ratio less than 1.11) conforms to shear failure, and the wall with a door (aspect ratio of 2.5) conforms to bending-shear failure. The diagonal bracing can distribute the stress in the wall, especially the concrete lattice beam, and effectively resist the lateral forces via the concrete lattice column, improving the ductility and integrity of the structural system.

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Section: Introductionmentioning

confidence: 97%

Seismic Response of Star-Type Grid Concrete Wall Structure by Numerical Modeling

et al. 2022

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“…In general, the damage degree of infill walls with flexible connection between the RC frame and the infill walls under the action of an earthquake is lower than that of a rigid connection between the RC frame and the infill walls. The degree of seismic damage to the wall decreases with the decrease in the tie bar spacing (Tang et al, 2019). A study by Cheng and Liu (2011) investigated the out-of-plane stability of four sets of two-layer infill walls in a frame through a shaking test, in which four different connection modes between the RC frame and the infill walls were adopted, including inclined bricks at the top of walls under rigid connection, disconnection, flexibility, as well as semi-flexibility.…”

Section: Introductionmentioning

confidence: 99%

Experimental and finite element analysis: Out-of-plane mechanical performance of infill walls with flexible connection

Zhou

Zhao

Chen

et al. 2023

Advances in Structural Engineering

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Flexible connection between the wall and the frame can improve the seismic performance of the structure, thus minimizing the pushing effect of the infill wall on the main frame. Masonry infill walls with flexible connection have lower out-of-plane stability than walls with rigid connection. However, local collapses are more likely to occur. A comparative study was conducted on the load-carrying capacity, initial stiffness, deformation and ductility of different wall structures based on a monotonous static load test, and the out-of-plane mechanical properties exhibited by flexible masonry infill walls were investigated. A simplified separated finite element model of masonry infill wall was built in accordance with the test results, and then the monotone out-of-plane static loading was performed. The structural configuration, the wall-frame connection method, and the spacing between structural columns were found to have significant effects on the out-of-plane mechanical behavior of the infill wall. The wall structural configuration was found to have the strongest effect, followed by the wall-frame connection method. Under the conditions of flexible connection, when the wall structure was in the “grid-beam” form, and the spacing between structuring columns was 2.5–3.0 m, the frame-infill wall was found with the best restraint effect, so the optimal out-of-plane comprehensive mechanical performance would be achieved.

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“…Another advantage is achieved when the polymer can be substituted with its recycled version. Such beneficial propertyembedding makes these materials suitable for vibration dampers or anti-earthquake protections [19,20]. This class of materials is known as interpenetrating phase composites (IPC) and there are at least two phases that are three dimensional interconnected, generating a topologically continuous network throughout the microstructure.…”

Section: Introductionmentioning

confidence: 99%

Recycled PET Composites Reinforced with Stainless Steel Lattice Structures Made by AM

Rusu,

Balc,

Moldovan

et al. 2023

Polymers

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Polyethylene terephthalate (PET) recycling is one of the most important environmental issues, assuring a cleaner environment and reducing the carbon footprint of technological products, taking into account the quantities used year by year. The recycling possibilities depend on the quality of the collected material and on the targeted product. Current research aims to increase recycling quantities by putting together recycled PET in an innovative way as a filler for the additive manufactured metallic lattice structure. Starting from the structures mentioned above, a new range of composite materials was created: IPC (interpenetrating phase composites), materials with a complex architecture in which a solid phase, the reinforcement, is uniquely combined with the other phase, heated to the temperature of melting. The lattice structure was modeled by the intersection of two rings using Solid Works, which generates the lattice structure, which was further produced by an additive manufacturing technique from 316L stainless steel. The compressive strength shows low values for recycled PET, of about 26 MPa, while the stainless-steel lattice structure has about 47 MPa. Recycled PET molding into the lattice structure increases its compressive strength at 53 MPa. The Young’s moduli are influenced by the recycled PET reinforcement by an increase from about 1400 MPa for the bare lattice structure to about 1750 MPa for the reinforced structure. This sustains the idea that recycled PET improves the composite elastic behavior due to its superior Young’s modulus of about 1570 MPa, acting synergically with the stainless-steel lattice structure. The morphology was investigated with SEM microscopy, revealing the binding ability of recycled PET to the 316L surface, assuring a coherent composite. The failure was also investigated using SEM microscopy, revealing that the microstructural unevenness may act as a local tensor, which promotes the interfacial failure within local de-laminations that weakens the composite, which finally breaks.

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Seismic performance of RC frames with EPSC latticed concrete infill walls

Cited by 11 publications

References 18 publications

Seismic Response of Star-Type Grid Concrete Wall Structure by Numerical Modeling

Seismic Response of Star-Type Grid Concrete Wall Structure by Numerical Modeling

Experimental and finite element analysis: Out-of-plane mechanical performance of infill walls with flexible connection

Recycled PET Composites Reinforced with Stainless Steel Lattice Structures Made by AM

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