Seismic assessment of irregularities in steel special moment resisting frame with asymmetric-plan building (case study: Gedung D - Universitas Dharma Andalas)

Author:

Fitrah R A,Mazni D I,Pratiwi W,Jauhari Z A

Abstract

Abstract The limitation of land is becoming the issue where the symmetric-plan building could not always be the proper choice. Besides that, the demands of architectural and esthetical construction also quickly increase. Then, there is the possibility where asymmetric-plan building will be the choice, in this case Gedung-D Universitas Dharma Andalas. But, designing asymmetric-plan building is having obstacle where the past studies revealed that the damage under strong ground motion become the major problem. It is because the asymmetric-plan will lead excessive torsion due to the horizontal irregularities or soft-story issue due to vertical irregularities. Then, it certainly affects the stability of structure. This research conducted the seismic assessment of asymmetric-plan 5-story building where Gedung-D Universitas Dharma Andalas, Padang will take place. The assessment is conducted by modeling three dimensional steel special moment resisting frame with seismic design category-D. Equivalent lateral force is applied to obtain early identification and response spectrum analysis is used in the next procedure to fulfill additional requirements. Based on SNI 1726:2019, the building has been categorized as horizontal irregularities where torsional irregularities and re-entrant corner irregularities mostly happened. It indicates that the other additional requirements need to be reconsidered such as increasing the design force about 25%, the amplified accidental torsions, P-? effect. In the other hand, vertical irregularities do not act toward this building. However, there are some inadequate values of inter-story drifts in X-direction toward drift limit. Then, it is concluded that this asymmetric-plan multi-story building needs to be designed in lateral resistance if this will be planned in future and act the good seismic performance.

Publisher

IOP Publishing

Subject

General Engineering

Reference13 articles.

1. Improved modal pushover analysis in seismic assessment of asymmetric-plan buildings under the influence of one and two horizontal components of ground motions;Belejo;Soil Dynamic and Earthquake Engineering,2016

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3. Behavior of building structures with vertical irregularity, excessive softness and mass against earthquake load;Budiono;Journal of Civil Engineering,2016

4. Predicting displacement demand of multi-storey asymmetric buildings by nonlinear static analysis and corrective eccentricities;Bosco;Engineering Structures,2015

5. Seismic evaluation of buildings with plan irregularity;Thomas;Applied Mechanics and Materials,2016

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