Seismic Performance of Existing R/C Building with Irregular Floor Plan Shape

Agus Agus,Febriyan Ramadhana,Muhammad Ridwan

doi:10.1051/matecconf/201821501035

Abstract

Bu33333333ilding with irregular floor plan has the eccentricity of force to the centre of building isappears to be more susceptible to deformation and damage when subjected to earthquake movements than with regular floor plan. This study aims to determine the seismic performance of buildings with the irregular floor plan in displacement and drift by service and ultimate performance limit.The object of research is Padang Pariaman public works office building. The evaluation method used non-linear static analysis(Pushover) which is one method to evaluate the seismic performance of the building.Pushover analysis performed by providing a static load in the lateral direction gradually to achieve a specific displacement target. This research is based on SNI-1726-2012, ATC-40 and FEMA 356. The results of the analysis show that the maximum lateral force of 10909.9 kN occurs in step-6 pushover analysis with a displacement of 0.165 m, maximum drift = 0.0705 m and maximum in-elastic drift = 0.025 m.This means the building is included in the IO (Immediate Occupancy) performance level. Although there is damage from small to medium level, still has a big threshold against the collapse, which means the building is safe against the earthquake.

Highlights

Earthquake disasters basically happen because of damage to buildings not because the earth shakes
Ahmed Abdelraheem Farghaly (2010), who conducted a study on the Influence of Irregular Floor Plan on the seismic response of the building, showed that the base shear induced in a perpendicular direction ranged between 40% and 80% of the base shear in the direction of the earthquake motion
After analyzing and evaluating seismic performance of existing R/C Padang Pariaman- Indonesia public works office building with irregular floor plan shape, the following conclusions can be drawn: 1. The maximum lateral force of 10909.9 kN occurs at step-6 pushover analysis with displacement of 0.165 m, maximum drift = 0.0705 m and maximum inelastic drift = 0.025 m. 2

Summary

Introduction

Earthquake disasters basically happen because of damage to buildings not because the earth shakes. Based on the experience of a major earthquake that occurred in West Sumatra-Indonesia on 30 September 2009, many caused the collapse of the building structure. The collapse of reinforced concrete buildings is generally caused by failure of the column structure [1]. The irregular shape of the floor plan has a profound effect on the movement of the building. Ahmed Abdelraheem Farghaly (2010), who conducted a study on the Influence of Irregular Floor Plan on the seismic response of the building, showed that the base shear induced in a perpendicular direction ranged between 40% and 80% of the base shear in the direction of the earthquake motion. The top displacements for T and L models increased up to 1.9 times the top displacement in the I-model [2]

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Results

Conclusion