Seismic Performance and Collapse Safety Assessment of Post-Tensioned Hybrid Precast Concrete Infill Wall-Frames and Comparison with Reinforced Concrete Infill Wall-Frames

2021 ◽  
pp. 1-24
Author(s):  
Binod Kumar Shrestha ◽  
Anil C. Wijeyewickrema ◽  
Susumu Kono
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Safety Assessment ◽  
Precast Concrete ◽  
Infill Wall ◽  
Post Tensioned

Seismic performance comparison between precast beam joints and cast-in-place beam joints

2016 ◽  
Vol 20 (9) ◽  
pp. 1299-1314 ◽  
Author(s):  
Hongtao Liu ◽  
Qiushi Yan ◽  
Xiuli Du
Keyword(s):  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Plastic Zone ◽  
Axial Compression ◽  
Seismic Performance ◽  
Compression Ratio ◽  
Precast Concrete ◽  
Concrete Structures ◽  
Reinforced Concrete Structures ◽  
Axial Compression Ratio

Precast reinforced concrete structures are widely used due to many constructional advantages such as faster construction speed, lower construction cost, being environmentally friendly, higher strength, and so on. To study the seismic performance of precast reinforced concrete structures, tests on beam-to-column joints of precast reinforced concrete structures were conducted under low reversed cyclic loading. In total, four joint specimens were produced in this study, including two precast joints and two cast-in-place joints. In addition to the comparison between different types of joints, the axial compression ratio of column was adopted as the main variable in this study. Analysis was carried out on the basis of the observed joint failure mode and relationships derived from the test data such as hysteresis curves, skeleton curves, stiffness degradation curves, energy dissipation capacities, and sleeve joint strain curves. Despite the closeness of energy dissipation capacity between the precast joints and the cast-in-place joints, they had different failure modes. Precast joints feature a relatively concentrated crack distribution in which the limited number of cracks was distributed throughout the plastic zone of the beam. Cast-in-place joints feature more evenly distributed cracks in the plastic zone, especially at the later stage of the loading. The steel slippage of the precast concrete joints was found influenced by the axial compression ratio. Through this study, it is concluded that seismic resistance capacity of precast concrete joint needs to be considered in design and construction and the grouting sleeve splice could be kept away from the hinge zones when precast concrete structures were used in regions of high seismicity. The results in this study can provide a theoretical basis for seismic design of precast reinforced concrete structures, which in turn can promote the application of precast reinforced concrete structures.

Cyclic loading test on a locally post-tensioned precast concrete beam–column connection

2019 ◽  
Vol 22 (12) ◽  
pp. 2699-2711 ◽  
Author(s):  
Dongzhi Guan ◽  
Hui Yang ◽  
Dan Ju ◽  
Zhengxing Guo ◽  
Sen Yang
Keyword(s):  
Seismic Performance ◽  
Concrete Beam ◽  
Precast Concrete ◽  
High Strength ◽  
Loading Test ◽  
Weak Beam ◽  
Rapid Construction ◽  
Structural Details ◽  
Strut And Tie Model ◽  
Post Tensioned

A novel precast concrete beam–column connection locally post-tensioned using arc-shaped prestressing bars was proposed for satisfactory seismic performance and rapid construction. Three full-scale cruciform specimens, including one monolithic reference specimen, were tested under reversal cyclic loadings to evaluate the seismic behaviours. Grade 630 steel rods and high-strength deformed steel rebars were used for the arc-shaped prestressing bars in the precast specimens. The results show that the proposed precast connection presents an acceptable seismic performance and that the structural details should be ameliorated to improve the energy dissipation capacity. The design philosophy of strong column-weak beam is applicable to the new precast system. Finally, a strut-and-tie model was developed to investigate the force transfer mechanism of the novel precast connection.

Seismic Performance of Steel Fiber Reinforced Concrete (SFRC) Infill Wall Element with Vertical Slits for Strengthening of Non-Ductile Frame

2014 ◽  
Vol 525 ◽  
pp. 431-434
Author(s):  
Won Gyun Lim ◽  
Yeon Jun Yun ◽  
Mi Hwa Lee ◽  
Hyun Do Yun
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Steel Fiber ◽  
Fiber Reinforced Concrete ◽  
Experimental Results ◽  
Hysteretic Behavior ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete ◽  
Infill Wall ◽  
Wall Element

This paper provides experimental results on the seismic performance of four concrete infill wall elements with test variables of vertical slits and hooked end steel fiber reinforcing. 1/3-scale infill wall elements with height-to-length ratio of 0.55 were manufactured and tested up to failure. Four walls (CIW-N and-S, SCIW-N and-S) are similar to each other except presence of steel fiber reinforcement and vertical slits with the width of 40 mm. All specimens had the same rectangular cross-section of 1,100 mm x 50 mm, with wall panel height of 600 mm. The experimental results showed that concrete infill wall element with vertical slits exhibited more stable hysteretic behavior than solid infill wall element. This phenomenon is remarkable for steel fiber reinforced concrete infill wall element. Inclusion of vertical slits on the normal concrete and steel fiber reinforced concrete infill wall element improve the ductility and energy dissipation capacity but decrease the load-carrying capacity and stiffness of infill walls.

scholarly journals Seismic Performance of a Three-Story Reinforced Concrete Building with Masonry Infill Walls and Friction Base Support

2021 ◽  
Vol 23 (1) ◽  
pp. 35-43
Author(s):  
Pamuda Pudjisuryadi ◽  
V.S. Prayogo ◽  
S.I. Oetomo ◽  
Benjamin Lumantarna
Keyword(s):  
Reinforced Concrete ◽  
Seismic Performance ◽  
Linear Time ◽  
Time History ◽  
Masonry Wall ◽  
Infill Wall ◽  
Infill Walls ◽  
Rc Structures ◽  
Masonry Infill ◽  
Masonry Infill Walls

The stiffness of masonry infill walls is commonly neglected in design practice of Reinforced Concrete (RC) structures. In fact, the stiffness of masonry infill wall may significantly influence seismic performance and dynamic behavior of RC buildings. In this research, influence of masonry infill walls to the structural performance of a three-story RC frame is investigated. In addition, possible application of friction-based support is also studied. Full 3D non-linear time history analysis is conducted to observe behavior of the structure under two-directional ground motion. In the analysis, any failed elements are removed subsequently from the model to avoid numerical analysis problem. The result shows that the placement of masonry infill walls can significantly influence the structural behavior of RC structure. Inappropriate placement of masonry wall may lead the building undergo soft-story mechanism. It is also found that the use of friction-based support can effectively improve the seismic performance of the building.

Fiber-reinforced concrete in precast concrete applications: Research leads to innovative products

PCI Journal ◽  
2012 ◽  
Vol 57 (3) ◽  
pp. 33-46 ◽  
Author(s):  
Nemkumar Banthia ◽  
Vivek Bindiganavile ◽  
John Jones ◽  
Jeff Novak
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Innovative Products

Use of Foam Polystyrene Waste in the Conditions of a Reinforced Concrete Products Factory

2020 ◽  
pp. 49-52
Author(s):  
S.E. YANUTINA ◽  
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Expanded Polystyrene ◽  
Insulation Material ◽  
Design Strength ◽  
Foam Polystyrene ◽  
Secondary Use ◽  
Concrete Blocks ◽  
Polystyrene Waste ◽  
Factory Laboratory

The relevance of research in the factory laboratory of JSC «198 KZHI», which is part of the HC GVSU «Center», is dictated by the need to dispose of foam polystyrene waste that occurs in large quantities when producing the precast concrete. In the production of three-layer external wall panels, polystyrene heatinsulating plates of the PPS 17-R-A brand are used as an effective insulation material. The secondary use of PPS 17-R-A for its intended purpose, as a heater, is not possible. The volume of foam polystyrene produced varies from 25 to 45 m3 per month. Utilization (disposal) of foam polystyrene waste is an expensive undertaking. Its use as a filler in the production of expanded polystyrene blocks was tested in the factory’s laboratory to produce foam polystyrene concrete with specified physical and mechanical characteristics. The results of testing of expanded polystyrene concrete of classes B2.5 and B 7.5 are presented. It is shown that under the conditions of the reinforced concrete factory technology, the production of polystyrene concrete blocks is possible with the achievement of the design strength. The information presented in the article is aimed at motivating specialists who produce recast concrete to the possibility of using foam polystyrene waste for low-rise construction. Keywords: foam polystyrene, ecology, energy efficiency, foam polystyrene concrete, foam polystyrene heat insulation plates, precast concrete.

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