Analytical investigation of vehicle fires in precast concrete parking structures

PCI Journal ◽  
2013 ◽  
Vol 58 (3) ◽  
pp. 111-123 ◽  
Author(s):  
Stephen Pessiki ◽  
Jonathan Bayreuther
Keyword(s):  
Precast Concrete ◽  
Analytical Investigation ◽  
Vehicle Fires

scholarly journals Analytical Investigation of the Flexural Capacity of Precast Concrete Frames with Hybrid Joints

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Ji-Hun Kim ◽  
Won-Kee Hong ◽  
Hee-Cheul Kim ◽  
Seong-Kyum Kim
Keyword(s):  
Precast Concrete ◽  
Limit State ◽  
Maximum Load ◽  
Analytical Investigation ◽  
Total Contribution ◽  
Moment Capacity ◽  
Composite Columns ◽  
Strain Compatibility ◽  
Load Limit ◽  
Hybrid Joints

This study aims to evaluate flexural strength based on the inelastic neutral axis calculated from all stress states of the proposed precast composite columns with hybrid beam-column joints, which facilitate the erection of concrete precast frames in a similar manner to that used for steel frames. It was also shown analytically that hybrid joints with headed studs contribute significantly to the flexural moment capacity and effectively increase the flexural structural performance of precast composite columns. The strain compatibility-based analytical results were compared with test data, showing results with an error of less than 8% at the critical section for the maximum load limit state of specimens. It is observed that the strength contributed by steel sections and headed studs increased by 30% and 35% at the yield limit state and maximum load limit, respectively, reducing the dependence on rebars. The total contribution of the headed studs was as large as 12.2% (average of the two layers of headed studs) at the maximum load limit state, whereas the strength provided by the tensile rebars decreased from 90.5% to 63.9% for the specimen with headed studs at the maximum load limit state.

scholarly journals Flexural Performance of Precast Concrete Slab with Gfrp and Geogrid Reinforcement

2020 ◽  
Vol 9 (1) ◽  
pp. 1711-1715
Keyword(s):  
Concrete Slab ◽  
Precast Concrete ◽  
Secondary Reinforcement ◽  
Analytical Investigation ◽  
Steel Reinforcement ◽  
Loading Test ◽  
Element Analysis ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

An Experimental Investigation was carried out to study the behavior of Glass fibre reinforced polymer bars (GFRP) and geo-grid reinforced precast concrete slab. Durability of reinforced concrete (RC) is mainly affected by corrosion of steel reinforcement. In Corrosive Environment, service life of GFRP and geo-grid much greater than that of steel. To overcome this, steel bars are replaced by GFRP and geo-grids materials as reinforcement. Two concrete slab specimens were cast with the dimension of 1500 ×600×125mm to study the flexure behavior. Among that, one slab specimen was cast with steel reinforcement. Another one specimen was cast with combination of GFRP bars as main reinforcement and geo-grid layer as secondary reinforcement. The specimens were tested for point loading test setup. Test results showed that the slab reinforced with combination of GFRP and geo-grid reinforcement significantly improved the energy dissipation properties by resisting force with high amount of displacement compared to conventional element. Analytical investigation was also carried out using finite element analysis to validate the force-displacement characteristics. The analytical results showed a good agreement with the experimental results.

Analytical Investigation of Commercial Geranium Oils from Pelargonium graveolens L'Hér

Planta Medica ◽  
2012 ◽  
Vol 78 (05) ◽  
Author(s):  
M Wang ◽  
A Chittiboyina ◽  
B Avula ◽  
J Zhao ◽  
N Tabanca ◽  
...  
Keyword(s):  
Analytical Investigation ◽  
Pelargonium Graveolens

Clay Product-Faced Precast Concrete Panels

PCI Journal ◽  
1994 ◽  
Vol 39 (1) ◽  
pp. 20-36 ◽  
Author(s):  
Sidney Freedman
Keyword(s):  
Precast Concrete ◽  
Concrete Panels
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