A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE FRAME UNDER IMPACT LOADING
This thesis focus on the performance of a 3D reinforced concrete portal frame subjected to vehicle collision by numerical simulation using ABAQUS (2013) software. The finite element software ABAQUS is utilized to simulate and analyze the vehicle collisions to obtain accurate and detailed results. Vehicle collision is a short duration dynamic load that could involve very large deformations and damage to the reinforced concrete structure. Simulation of vehicle collision on the reinforced concrete portal frame column is carried out by varying the speed of the vehicle, shape of portal frame column and by adding gravitational load on the portal frame. The portal frame selected for this study consists of square and circular reinforced concrete column cross-section with the rectangular beam cross section. The gravitational load on reinforced concrete portal frame was considered by taking 0%, 25% and 50% of vehicle mass. Vehicle collisions are carried out with three different car speeds: 30km/hr, 60km/hr, and 120 km/hr. A total of sixty analyses were conducted; two portal frame column shapes with two mass of vehicle, three different gravitational loads at three vehicle impact velocities. The finite element modeling controls and material properties are validated by conducting an impact drop hammer experiment. The finite element modeling is validated by comparing with an impact drop hammer experiment from literature. The accuracy and stability of impact simulation is checked using conservation of energy. From the finite element analysis results, it can be concluded that as the impact velocity increases, the impact force and lateral displacement of the reinforced concrete portal frames increase. The higher the impact velocity, the large the amount of damage caused throughout the portal frame. The lateral displacement decreases with an increase in portal frame column cross-section. The lateral displacement curve from the impact load was larger for the circular column portal frame than the square column portal frame with average difference of 2%, which implies square columns of portal frame performed better than the circular columns of portal frame due to shapes of the column.
FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE FRAME UNDER IMPACT LOADING
This thesis focus on the performance of a 3D reinforced concrete portal frame subjected to vehicle collision by numerical simulation using ABAQUS (2013) software. The finite element software ABAQUS is utilized to simulate and analyze the vehicle collisions to obtain accurate and detailed results. Vehicle collision is a short duration dynamic load that could involve very large deformations and damage to the reinforced concrete structure. Simulation of vehicle collision on the reinforced concrete portal frame column is carried out by varying the speed of the vehicle, shape of portal frame column and by adding gravitational load on the portal frame. The portal frame selected for this study consists of square and circular reinforced concrete column cross-section with the rectangular beam cross section. The gravitational load on reinforced concrete portal frame was considered by taking 0%, 25% and 50% of vehicle mass. Vehicle collisions are carried out with three different car speeds: 30km/hr, 60km/hr, and 120 km/hr. A total of sixty analyses were conducted; two portal frame column shapes with two mass of vehicle, three different gravitational loads at three vehicle impact velocities. The finite element modeling controls and material properties are validated by conducting an impact drop hammer experiment. The finite element modeling is validated by comparing with an impact drop hammer experiment from literature. The accuracy and stability of impact simulation is checked using conservation of energy. From the finite element analysis results, it can be concluded that as the impact velocity increases, the impact force and lateral displacement of the reinforced concrete portal frames increase. The higher the impact velocity, the large the amount of damage caused throughout the portal frame. The lateral displacement decreases with an increase in portal frame column cross-section. The lateral displacement curve from the impact load was larger for the circular column portal frame than the square column portal frame with average difference of 2%, which implies square columns of portal frame performed better than the circular columns of portal frame due to shapes of the column.
FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE FRAME UNDER IMPACT LOADING
WOLDEYES TILAYE DIFE (author)
2018-06-11
doi:10.20372/nadre/3944
Theses
Electronic Resource
English
DDC:
690
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