A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
EFFECT OF DUCTILITY CLASS ON THE SEISMIC PERFORMANCE OF REINFORCED CONCRETE FRAME STRUCTURES
Nowadays, prediction of inelastic seismic responses and the evaluation of seismic performance of a structural building are very important subjects. Provision of ductility in the structures according to the modern design codes lead to more economic constructions, while safety levels reach higher rates. The philosophy is based on allowing some damage to occur in predetermined elements where enough ductility has been provided in order to ensure the member"s capacity during an earthquake. This research focuses on investigating optimum ductility provisions for buildings to achieve the desired performance. Analytical work was based on the comparison of G+4, G+8 and G+12 reinforced concrete buildings designed as high ductility class and medium ductility class upon a strong rock (Ground type A, EBCS EN 1998-1:2014) according to the EBCS EN 1998-1:2014. The criteria and requirements used for the design of the building using capacity design philosophies are adopted according to the provision of EBCS EN 1998-1:2014. After the buildings have been designed for the incoming earthquake, the performance evaluation of the buildings was done using static nonlinear analysis methods using ETABS 2016.1.0 software. The parameters used for the evaluation of seismic performance of the structures are capacity curve, story displacement, inter-story drift and plastic hinge distribution of the building. As the ductility increase from DCM to DCH the result becomes (i) base shear increased by 7.9%, 9.5% and 4.2% and increased by 7.95%, 7.3% and 5.1% along in the X and Y direction respectively. (ii)Top Displacement is increased by 20.9%, 18.9%and 13.6% and increased by 18.4%, 13.97% and 12.47% along in the X and Y direction respectively. (iii) Inter Story drift increased by 15.4%, 18.8% and 10.9% and increased by 14.8%, 9.7% and 21.98% along in the X and Y direction respectively. (iv) Plastic hinge distribution at the last step of pushover analysis at the range greater than CP in DCM is higher than DCH and at the performance point the performance of the three sample buildings become IO but the number of plastic hinges distribution on level A-B and B-C are not identical for DCM and DCH. performance of Ductility Class Medium (DCM) buildings.
EFFECT OF DUCTILITY CLASS ON THE SEISMIC PERFORMANCE OF REINFORCED CONCRETE FRAME STRUCTURES
Nowadays, prediction of inelastic seismic responses and the evaluation of seismic performance of a structural building are very important subjects. Provision of ductility in the structures according to the modern design codes lead to more economic constructions, while safety levels reach higher rates. The philosophy is based on allowing some damage to occur in predetermined elements where enough ductility has been provided in order to ensure the member"s capacity during an earthquake. This research focuses on investigating optimum ductility provisions for buildings to achieve the desired performance. Analytical work was based on the comparison of G+4, G+8 and G+12 reinforced concrete buildings designed as high ductility class and medium ductility class upon a strong rock (Ground type A, EBCS EN 1998-1:2014) according to the EBCS EN 1998-1:2014. The criteria and requirements used for the design of the building using capacity design philosophies are adopted according to the provision of EBCS EN 1998-1:2014. After the buildings have been designed for the incoming earthquake, the performance evaluation of the buildings was done using static nonlinear analysis methods using ETABS 2016.1.0 software. The parameters used for the evaluation of seismic performance of the structures are capacity curve, story displacement, inter-story drift and plastic hinge distribution of the building. As the ductility increase from DCM to DCH the result becomes (i) base shear increased by 7.9%, 9.5% and 4.2% and increased by 7.95%, 7.3% and 5.1% along in the X and Y direction respectively. (ii)Top Displacement is increased by 20.9%, 18.9%and 13.6% and increased by 18.4%, 13.97% and 12.47% along in the X and Y direction respectively. (iii) Inter Story drift increased by 15.4%, 18.8% and 10.9% and increased by 14.8%, 9.7% and 21.98% along in the X and Y direction respectively. (iv) Plastic hinge distribution at the last step of pushover analysis at the range greater than CP in DCM is higher than DCH and at the performance point the performance of the three sample buildings become IO but the number of plastic hinges distribution on level A-B and B-C are not identical for DCM and DCH. performance of Ductility Class Medium (DCM) buildings.
EFFECT OF DUCTILITY CLASS ON THE SEISMIC PERFORMANCE OF REINFORCED CONCRETE FRAME STRUCTURES
BISRAT AYALEW AWOKE (author)
2019-06-12
doi:10.20372/nadre/3864
Theses
Electronic Resource
English
DDC:
621
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