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All Journal Jurnal Sains dan Teknologi Tadulako AMMA : Jurnal Pengabdian Masyarakat
Ketut Sulendra
Tadulako University
Humanities Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Nursing

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The STUDY OF RESISTANT EARTHHQUAKE BUILDING OF TIMBER ROOFS STRUCTURE AND ITS RETROFIT AND REDESIGN AFTER THE SEPTEMBER 28 2018 EARTHQUAKE Ketut Sulendra
Jurnal Sains dan Teknologi Tadulako Vol 9 No 1 (2023): April 2023
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/jstt.v9i1.445

Abstract

Palu’s Earthquake on 28 September 2018 had caused structural failure including buildings with wooden structures which were knew as an earthquake-resistant structures. This study will discuss existing building timber roofs structure were damaged after the earthquake, various and caused of the damaged. Existing and retrofitted timber rooss and alternatives design of the roofs structures will be compared. Retroffited timber roof, truss roof with 70x70x6 double angle and gable frame roof structure with WF 250x125 will be design with 15 m length span and 45° slope. Based on these data collected from initial assessment of that buildings, analysis was conducted. Detailed assessments were carried out, when analysis of the truss, frame and joint of roofs structures were needed. Results of the initial assessment of wooden structure, showed that damages occurred at the many joints of member joints and joint-connection between wall and truss as the poor connection system. Redesign showed were structural behavior of retrofitted timber roof, double angle truss roof and gable frame roof structure showed better strength, stiffness and ratio of member force to self-weight.
Pemanfaatan Abu Batu Untuk Bahan Bangunan Batako, Paving Block Dan Roster H. Listiawaty; I. K. Sulendra; T. Hilmansyah; M. Sutrisno
AMMA : Jurnal Pengabdian Masyarakat Vol. 2 No. 10 : November (2023): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

Central Sulawesi is one of the main producers of Quarry C, which is processed into crushed stone in crushed stone factories (stone crushers). The number of crushed stone factories operating in the area between Palu-Donggala City is around forty units. The production of crushed stone factories apart from 1-2" and 2-3" crushed stone also contains smaller sized stone ash. This rock ash has a much smaller economic value so it is often not utilized and becomes waste at factory sites. Stone ash with the characteristics of a small specific gravity, even lighter than natural sand, has considerable potential to be used as a building material. It just needs research and testing before being used. Because it has a fine gradation and a small specific gravity, its potential can be used to make lightweight bricks, wall rosters and paving blocks. Apart from that, it is still possible to use it as a filler in asphalt concrete mixtures and aggregates for lightweight concrete. The initial tests required in the laboratory are: sieve analysis and compressive strength tests of bricks, paving blocks and rosters. The test results showed that there was an increase in compressive strength values for both bricks, paving blocks and roofs. The compressive strength value of brick with the addition of stone ash complies with SNI requirements and is included in category A, Paving Block is included in category A for road use, as well as roster there is a significant increase in the compressive strength value.
Co-Authors H. Listiawaty M. Sutrisno T. Hilmansyah