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All Journal JOURNAL OF CIVIL ENGINEERING, BUILDING AND TRANSPORTATION Jurnal Sains dan Teknologi
Syafri Wardi
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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Seismic Performance of an RC Building Using Pushover Analysis : (Case Study: Three-Storey Flat House Building in Padang City) Windy Wulandari; Syafri Wardi
JOURNAL OF CIVIL ENGINEERING BUILDING AND TRANSPORTATION Vol. 7 No. 1 (2023): JCEBT MARET
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jcebt.v7i1.8564

Abstract

Indonesia is located in a high seismic risk area, and past earthquakes have caused many death tolls due to building collapses. Therefore, evaluation of the seismic performance of existing buildings is critical to minimize the risk due to earthquake damage. This study is aimed to evaluate the seismic performance of a three-story flat house building in Padang city, Indonesia. The building was designed based on the older seismic design code SNI 1726:2012. Based on a previous study, if the structure is analyzed using the latest seismic design code SNI 1726:2019, the dynamic base shear force increases by about 20%. Therefore, further analysis needs to be conducted using pushover analysis. The pushover analysis results are capacity curve, displacement or drift, performance point, performance level, and plastic hinge mechanism of the building. The analysis results show that the performance level of the building after the pushover analysis in the x and y directions is immediate occupancy with the plastic hinged formed firstly at the end of the beam. This performance level means that the damage due to an earthquake is not so significant, and the stiffness of the building is almost the same as before the earthquake. This result is obtained because of the insignificant increase of the spectrum response parameter in SNI 1726:2019; therefore, the performance level of the building is not affected.
Pengaruh Variasi Komposisi Agregat Kasar Terhadap Kuat Tekan dan Penyerapan Air Paving Block Dera Anggun Saputri; Syafri Wardi; Angelalia Roza
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 5 (2023): Oktober 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i5.2667

Abstract

According to SNI 03-0691-1996, paving block is a composition of building materials made from a mixture of portland cement or similar hydraulic adhesive materials, water and aggregate with or without other additives. Pavement construction in Indonesia mostly uses natural aggregates or crushed stone that has a rough and angular surface so that it has excellent adhesion to the concrete. The purpose of this study is to evaluate the effect of the addition of crushed stone on the compressive strength and water absorption of concrete paving blocks, compared with paving blocks of mortar. Paving block test samples were made with 5 variations of composition of cement:sand:crushed stone, namely 1:4:0, 1:4:1, 1:4:2, 1:4:3 and 1:4:4. Each composition was made as test samples of blocks with a size of 20 cm × 10 cm × 6 cm. The test results showed that the average compressive strength of paving blocks with the composition of 1:4:0, 1:4:1 and 1:4:4 was less than 8,5 MPa and water absorption is greater than 10%; thus, they were not classified as paving blocks with grade D. While, the paving blocks with the composition of 1:4:2 and 1:4:3 were classified as paving blocks with grade D.
Pengaruh Penggunaan Agregat Kasar dan Metode Pemanasan Styrofoam Terhadap Beton Ringan Ericko Aditya Chandra; Syafri Wardi; Angelalia Roza
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 5 (2023): Oktober 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i5.2668

Abstract

Concrete is a construction material that is widely used in various types of construction. One of the disadvantages of concrete is that its specific gravity is quite high, thus giving a big dead load on the structure. An alternative to overcome this weakness is using lightweight concrete. Therefore, in this study, lightweight concrete will be made with heated styrofoam. The styrofoam used is expanded polystyrene (EPS) type with a grain size of 4-5 mm. Heating of styrofoam the was done at 100°C for 15 minutes and 100°C for 25 minutes. The objective of this study is to evaluate the compressive strength and specific gravity of lightweight concrete using heated styrofoam material with different heating methods and the use of coarse aggregate in the lightweight concrete. Test sample in this study used heated styrofoam as 100% coarse aggregate replacement and 75% coarse aggregate replacement, while the remaining 25% uses coarse aggregate with a maximum grain size of 19.05 mm. To improve workability, a superplasticizer of 0.9% by weight of cement was used. The results of compressive test showed that the optimum value of compressive strength testing of 11.24 MPa in lightweight concrete with coarse aggregate and heated styroforom with the heating for 25 minutes at a temperature of 100°C. The concrete strength was classified into lightweight concrete lightweight structure. The specific gravity of the concrete is 1.578.38 kg/m3, which was classified into lightweight concrete based on SNI 03-3449-2002.
Co-Authors Angelalia Roza Dera Anggun Saputri Ericko Aditya Chandra Windy Wulandari