Abdul Hakam

LIQUEFACTION POTENTIAL ASSESSMENT BASED ON LABORATORY TEST

The physical properties of sand soil which give effect to the resistance of liquefaction include grain size and density. Those physical properties of sand soil associated to liquefaction resistance have been studied in laboratory. Based on that study, the method to assess the liquefaction potential then is proposed. In laboratory tests, the vibration source is given by using the shaking table. During the tests, the acceleration and settlement are recorded. It then concluded that there is a relationship between density and gain size particles associated with liquefaction resistance for certain acceleration of vibration. The cone penetration and relative density relationship has been developed based on experiments in laboratory. Based on the results of those laboratory tests, the liquefaction potential of a certain site then assessed. It is found that the relative density and mean gain size relationship can be used to assess liquefaction potential in sand deposits.

Landslide hazard of Maninjau area

Purpose The purpose of this paper is to determine the potential landslide of Maninjau area. Design/methodology/approach A literature review and field investigation were undertaken to determine the potential landslide of Maninjau area. The field study includes the physical and mechanical properties of the soil in Maninjau area. Findings The Maninjau Lake area is very prone to landslides. Landslides in Maninjau may happen especially for slopes more than 40 per cent. The action plan must be done as well as the installation of the early warning equipment in the landslide-prone areas and re-plantation on critical ground. Originality/value The paper is very specific as it attempts to discover how prone Maninjau area is to landslides.

Retrofitting of STKIP ADZKIA Padang Building Using V-Inverted Steel Bracing

Construction failure is always associated with non-fulfillment of the quality and technical specifications of the material that should be considered when the construction process has been done. STKIP ADZKIA Padang building is one of 4-story reinforced concrete (RC) building that has structural damage during construction phase. The beams of the building undergo large deflection and the cracks appear in the wall when the building was constructed up to 2nd floor. In this paper, building assessment was carried out to evaluate the performance of the existing building. The structure was analysed based on New Indonesian Seismic Code, SNI 03-1726-2012. The result shows that the building is not capable to resist the working loads. Furthermore, retrofitting of the building structure using V-inverted steel bracing was proposed. The analysis result shows that retrofitting of the structure by installing the steel bracing on the RC frames in both X and Y directions increase the capacity of the building structure.