Optimization of Reinforced Concrete Column Using Android- based Mobile Application

Reinforced concrete column has complicated calculations. Designer usually acts trial and error to get the optimum dimension and reinforcement according to the occurred loads. It takes long process and the result is not always be the most economical section. Nowadays smartphone with its various applications is very popular among societies. Besides being more flexible in place and time, smartphone has ease in operation and is commonly used by people. Hence, those advantages can be used to optimize reinforced concrete column quickly and accurately. The application named “C2 App” (Concrete Column Application) had been created by accommodate regulation in Indonesia (SNI 2847:2013). Biaxial calculation used Bresler’s approach, while calculation of slender column applied Moment Magnification Method. The application is able to show interaction diagram, section drawing, and result tables. Moreover, the application was equipped with local database, and detailed calculations in pdf format to support the real project. Validation was done with computer-based software named CSiCol and ASDIP Concrete, whereas the optimization result was compared with other designs which used ACI Diagrams and Particle Swarm Optimization method. The application was pretty accurate and could provide a more economical section.

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Construction of Uniaxial Interaction Diagram for Slender Reinforced Concrete Column Based on Nonlinear Finite Element Analysis

Advances in Civil Engineering ◽

10.1155/2021/3275512 ◽

2021 ◽

Vol 2021 ◽

pp. 1-10

Author(s):

Bedaso Ahmed ◽

Kefiyalew Zerfu ◽

Elmer C. Agon

Keyword(s):

Finite Element Analysis ◽

Reinforced Concrete ◽

Slenderness Ratio ◽

Nonlinear Finite Element ◽

Concrete Column ◽

Reinforced Concrete Column ◽

Element Analysis ◽

Interaction Diagram ◽

Order Analysis ◽

Rc Column

Slender reinforced concrete column may fail in material failure or instability failure. Instability failure is a common problem which cannot be analyzed with first-order analysis. So, second-order analysis is required to analyze instability failure of slender RC column. The main objective of this study was to construct uniaxial interaction diagram for slender reinforced concrete column based on nonlinear finite element analysis (FEA) software. The key parameters which were studied in this study were eccentricity, slenderness ratio, steel ratio, and shape of the column. Concrete damage plasticity (CDP) was utilized in modeling the concrete. Material nonlinearity, geometric nonlinearity, effect of cracking, and tension stiffening effect were included in the modeling. The results reveal that, as slenderness ratio increases, the balanced moment also increases, but the corresponding axial load was decreased. However, increasing the amount of steel reinforcement to the column increases the stability of the column and reduces the effect of slenderness ratio. Also, the capacity of square slender RC column is larger than rectangular slender RC column with equivalent cross section. However, the result is close to each other as slenderness ratio increased. Finally, validation was conducted by taking a benchmark experiment, and it shows that FEA result agrees with the experimental by 85.581%.

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Fire Resistance Performance of Reinforced Concrete Column with Embedded Permanent Formwork Using Woodwool Panel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.661.111 ◽

2014 ◽

Vol 661 ◽

pp. 111-117 ◽

Cited By ~ 9

Author(s):

Ahmad Zakiah ◽

Ahmad Nursafarina ◽

Azerai Ali Rahman ◽

Hanizah Abdul Hamid ◽

Mohammad Soffi Md Noh

Keyword(s):

Reinforced Concrete ◽

Cross Sections ◽

Fire Resistance ◽

Resistance Test ◽

Concrete Column ◽

Reinforced Concrete Column ◽

Permanent Formwork ◽

Fire Resistance Test ◽

Slender Column ◽

Resistance Performance

This paper reports the investigation on the fire resistance performance of reinforced concrete column with embedded permanent formwork from woodwool board (WWCB). A series of slender column embedded with and without WWCB with cross-sections 200 mm x 200 mm for column without WWCB and 300 mm x 300 mm with embedded 50 mm thick WWCB. The height of the slender column was 2000 mm. The fire resistance test was performed in accordance with BS 476-22:1987 for two (2) hours fire exposure. The fire resistance test for the embedded column with WWCB was classified as “good” in resisting fire and heat transfer.

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