Sejak berlakunya gempa bumi dan tsunami pada 26 Disember 2004 di Sumatera,
timbul kesedaran pada para jurutera di Malaysia mengenai kepentingan tentang
pertimbangan beban gempa bumi terhadap struktur bangunan di sini.
Dalam projek ini, satu pelan bangunan sederhana tinggi telah diambil kira untuk
dianalisa. Analisis ini adalah berkenaan dengan tindakan beban gempa bumi ataupun
beban seismik, termasuk juga beban lain seperti beban angin, beban graviti atau
swaberat, beban kemasan, beban hidup dan beban batu bata dengan
mempertimbangkan perubahan pesongan sisi. Analisis dilakukan dengan menggunakan
perisian STAAD III Release 22.3.
Daripada analisis yang telah dilakukan, didapati, beban gempa bumi memberi kesan
yang lebih besar terhadap pesongan sisi struktur berbanding beban-beban lain yang
diambil kira seperti beban angin, beban swaberat, dan beban mati. Pesongan akibat
daripada beban seismik adalah 39.9mm manakala beban angin ialah 21.5mm.
Walaupun semakan terhadap had muktamad adalah mematuhi nilai yang dibenarkan,
tetapi perbezaan pesongan yang hampir dua kali ganda akibat beban seismik
berbanding beban angin memberikan peringatan awal terhadap keperluan
mempertimbangkan beban seismik dalam andaian merekabentuk struktur bangunan di
Malaysia.
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Since the earthquake and tsunami that happened on 26th December 2004 in Sumatra, it
has increased the awareness and urged engineers in Malaysia to identify the
importance of considering the earthquake impact to the building structures.
In this project, a plan of a medium rise building is selected. This analysis is about the
earthquake impact or seismic impact, including other forces such as wind load,
gravitational load or selfweight, finishes load, life load and brick wall load with the
consideration of the drift. The analysis is being done with the aid of STAAD III
Release 22.3 software.
From the analysis, it shows that seismic load gave that major lateral deflection to the
building structure, compared to other forces such as wind loads, selfweight and live
load. The total lateral deflection due to seismic load is 39.9mm while wind load is
21.5mm. As for the inter-storey drift, the value of 3mm is due to wind and 5mm for
seismic load.
Even though the drift is in the safe range for the structure, the drift difference for
seismic load is nearly twice the wind loads. This gives an early notice in the
importance of seismic loads consideration for designing any structure in Malaysia.
Analysis of medium rise reinforced concrete building subjected to lateral loads / Nadia Mohamad Nashuki