Self-check for Earthquake Safety of Concrete Hollow Block Houses in the Philippines

Full scale shaking table test of CHB Houses

A full-scale shaking table experiment on CHB masonry structures was conducted in Japan to showcase two types of CHB houses. One model represented a code-compliant CHB house (Model A) and the other represented the more common residential CHB house (Model B) in the Philippines. The aim of the test was to better understand the vulnerability of its different parts and sections, the failure pattern and the overall behavior of similar structures during large earthquakes.

For the Philippine CHB houses, the application of mortar is another crucial construction activity that should be given equal importance as with appropriate reinforcements. Mortar should be properly applied and compacted requiring proper mixing, pouring and curing to produce homogeneous fill and bond.

Specification Model A Model B
CHB Wall 6”(400x200x150 mm) 4”(400x200x100 mm)
Veritical Steel Bars 10 millimeter diameter spaced at 40 centimeter 46 millimeter diameter spaced 90 centimeter
Horizontal Steel Bars 10 millimeter diameter spaced at 60 centimeter or laid every 3 layers 6 millimeter diameter spaced at 60 centimeter or laid every 3 layers
Mortar Mix (Cement : Sand) 1:4 Compacted 1:4 Not compacted
Roof Frame / Roofing Wood / G.I. Sheets Wood / G.I. Sheets

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For more info:
DOST-PHIVOLCS
Department of Science and Technology
PHILIPPINE INSTITUTE OF VOLCANOLOGY AND SEISMOLOGY
PHIVOLCS Building, C.P. Garcia Avenue
U.P. Campus, Diliman, Quezon City
Telephone Nos: +63 2 426 1468 to 79
Fax No.: +63 2 929 8366
Website: www.phivolcs.dost.gov.ph