ANALISA KEKUATAN KOLOM GEDUNG RUMAH SAKIT TYPE C MEDAN LABUHAN PADA WILAYAH ZONA GEMPA YANG BERBEDA (STUDI KASUS)

<p>Indonesia is a country that is a often hit by disasters, this is due to the meeting of 4 tectonic plates of the earth. The city of Padang is right at the meeting between the Indo-Australian plate and Eurasia so that it puts the city of Padang as one of the cities prone to earthquakes. This research analyzes the type C hospital building that was originally designed in the Medan city location to be designed in Padang city with the aim to determine the strength of the structure and the need for the width of the column reinforcement in the building. The first step is to determine the spectral response value of the Padang region earthquake, a short period of 0.2 seconds Ss = 1,289 g and a period of 1 second S1 = 0.549 g. Second is calculating dead load, live load and static earthquake load equivalent to SNI 03-1726-2012 and force output in using ETABS software, and third is calculating the column reinforcement area requirements. The results of the analysis show that the width of the column reinforcement there is a difference = 4750.00 mm against field data = 6801.24 mm in the dimensions of the column 500 mm x 500 mm with a value of = 2051.24 mm and an increase in the value of the calculation reinforcement area in the 700 mm column x 700 mm is = 9800.00 mm from the field data = 9068.32 mm with a selection = 731.68 mm.</p>

Rainwater harvesting for fish farming water requirements in Boyolali Regency, Indonesia

<p>Climate change causes dry and rainy seasons to shift. Hydrology also shows that the number of rainwater changes with the uncertainty of its potential occurrence. In catfish farming and hydroponic farming, ensuring water availability is important for the sustainability of the project. Existing research is about managing rainwater, which can help partially supply water for both projects' benefit. The research location is in Jeron Village, Nogosari District, Boyolali Regency. Boyolali Regency is a 22 % residential area of the total area. It means 570 m³ potential storage. However, the result shows that only 17% of the roof area can collect rainfall for residential houses. In this study's residential case example, 17% of the roof area gives 97.8 m³ / year. The problem is that currently, there is no Rain Water Harvesting (RWH). A system capable of supporting the water supply. Using RWH provides a benefit based on the potential supply. This study highlights the potential benefits of using RWH. This pool yields a profit of up to (Indonesian Rupiah) IDR. 36,643,718 / month or IDR. 439,724.61 / year, with a probability of 80%. It means that in 5 years, it failed once. Moreover, water needs can supply from RWH.</p>

PRELIMINARY STUDY ON PLASTICINE AS A SUBSTITUTE COHESIVE MATERIAL FOR GEOTECHNICAL PHYSICAL SOIL MODELING

<p>Plasticine is an artificial material made from solids such as gypsum, lime, mixed with petroleum jelly or micro wax and acid fat. The properties of plasticine are likely similar to natural clay and is influenced by oil content. The information about mechanical properties of plasticine is still very rare, and as such the study on it is riquired and must be conducted intensively. The preliminary laboratory study has been conducted to understand the behaviour of plasticines. Microwax and petroleum jelly based plasticines were utilised with the variation of oil content, whereas kaolin clay with the variation of water content is utilised as a reference material. The study is focusing on the stress-strain behaviour for both microwax and petroleum jelly based plasticines compared to the stress-strain behaviour of kaolin clay. This paper reports the result of preliminary investigation regarding the use of plasticine as an alternative artificial material for substitution of clay in soil modeling. Some engineering properties from unconfined compression strength (UCS) test and hand penetrometer are shown. The result indicates that the stress-strain behaviour of plasticine resembles the stress-strain behaviour of kaolin clay. The plasticine is suitable as a substitute cohesive material and it has a potential to be utilised for geotechnical material modelling in the future.</p>