Terima kasih fotonya pak pras. Ada hal yang ingin saya share dari foto-foto
yang mungkin berguna buat kita. Saya melihat jenis mekanisme keruntuhan yang
sama dari bangunan-bangunan itu.
1. Keruntuhan pada tiang terjadi di tengah tiang atau di pertemuan tiang-balok
yang terjadinya diposisi tiang. Sebenarnya sewaktu saya kuliah dulu dan didalam
building code, mekanisme keruntuhan itu harus terjadi di balok, sehingga kalau
gempa bangunannya tidak rubuh. Kita menyebutnya "Strong Column Weak Beam". Tapi
umumnya masyarakat kita tidak mau memdesain tiang itu cukup besar terhadap
balok, karena memakan space. Dengan seringnya gempa sekarang ini, Kalo kita mau
bangun rumah, tiangnya jangan terlalu tipis atau kecil dan sediakan penyaluran
besi di pertemuan tiang- balok yang cukup panjang.
2. Tembok yang runtuh tidak terlihat adanya angkur ke tiang, sehingga kalau ada
gempa bisa runtuh. Sebaiknya kalau mendirikan tembok dipasang angkur ke tiang
setiap 0.5 m dengan panjang besi 80 cm.
Sebisa mungkin kalo terjadi gempa, keluarlah secepatnya dari gedung atau rumah,
karena mungkin rumah kita tidak di desain dengan baik.
semoga berguna
'ali
________________________________
From: "Prasetyo, Hani" <hani.prase...@sc.com>
To: obrolan-bandar@yahoogroups.com
Sent: Thursday, October 1, 2009 4:28:25 PM
Subject: [ob] Padang earthquake aftermath
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