Rudy Setiawan

PENGARUH KEGIATAN PERPARKIRAN DI BADAN JALAN TERHADAP KINERJA RUAS JALAN STUDI KASUS JALAN KERTAJAYA

The using of Roller Compacted Concrete (RCC) is one of many alternatives that can be used to decrease dam construction cost. Many Roller Compacted Concrete (RCC) composition has been developed to achieve maximum compressive strength. Due to the economical consideration and the possibility of the execution, drop hammer system has been used for this research. Compression test is done after the age of the sample reaches seven, 28, 60, and 90 days. The result shows that 60/40 composition of gravel/sand has higher average compressive strength on all age of sample. The highest compressive strength the achieve is 17.78 MPa for 90 days sample.The slake-durability test is regarded as a simple test for assessing weathering of rocks. This simple test has been accepted as a standard test by the Rock Mechanics Society. However, mechanisms into slaking processes have not been fully understood yet as many factors involved in the processes. The current research explored mechanisms performed by the test by conducting a series of slakedurability tests for four types of soft rocks taken from Coober Pedy, South Australia. Results show that the slake-durability index (Id2) of weathered soft rocks was influenced by the degree of weathering. Distinctly weathered rocks had lower indeces compared to partly weathered rocks. Shapes also influenced the Id2 of these soft rocks. Different shapes displayed different mechanisms in the slaking processes. Samples that had irregular shapes tended to have a lower Id2 compared to samples that had rounded shapes. Thus, the slake-durability test might have simple procedures, but it could have complicated mechanisms in slaking processes that contribute to the result of the test.A method commonly used to stabilize expansive soils is mixing the soil with foreign materials. The main obstacle raised from soil stabilization in the field is the difficulty in mixing process. This paper presents the strength distribution in soft soil due to the addition of single columns of quicklime and carbide wasteproduct from gas industry that contains Calcium Oxide (CaO) up to 60%. The results show that the addition of columns filled with carbide waste product and quicklime increase the shear strength of surrounding soil. The spreading of the strength tends to follow a unique pattern, that the increase of soil shear strength at a certain normalized-distance, S (in column diameter D) from the column axis is constant. A significant increase of strength occurs in the area closer to the column, and it decreases with the distance from the column.

USULAN STANDAR DAN EVALUASI TINGKAT PELAYANAN WALKWAY DI UNIVERSITAS KRISTEN PETRA

It has been realized that culture has an important role in formation of settlement spatial structure. The people who highly related to culture such in Bali, in macro context, settlement spatial structure is determined by cosmic system performed by symbolism of sacred mountain and sea as profane area. In the micro scale, it is manifested in the distribution of space in house yard, therefore it is permanently defined. On the other context, settlement spatial structure can also be shown by observing ritual and religious activities. These activities are routinely conducted, and it the usage of space are not permanent, then the structure of space will be temporary. Sasaknese in Lombok island are strongly embraced to their culture in relation with their settlement arrangement, others are performed in life cycle and religious activities. By observing Sasaknese culture, we would be able to understand the settlement spatial structure. Abstract in Bahasa Indonesia : Sejak lama disadari bahwa budaya memiliki peran yang sangat penting dalam membentuk struktur ruang permukiman. Pada masyarakat yang teguh memegang budaya seperti di Bali misalnya, struktur ruang permukiman secara makro sangat ditentukan oleh sistem kosmis yang diwujudkan melalui simbolisme gunung sebagai sakral dan laut sebagai profane, sedang pada skala mikro nampak pada pembagian ruang permukiman, dan dapat dikatakan bersifat tetap. Penggambaran struktur ruang permukiman juga dapat dilihat dari sisi budaya lain seperti pada pelaksanaan ritual dan acara keagamaan. Acara ini bersifat rutin akan tetapi ruang yang digunakan tidak semata untuk ritual saja, sehingga strukturnya juga nampak temporal. Masyarakat Sasak di Pulau Lombok juga sangat terkait dengan budaya dalam menata ruang permukimannya, ataupun pada ritual daur hidup dan berbagai acara keagamaan. Melalui kajian ini dapat dilihat adanya pembentukan struktur ruang permukiman berbasis budaya Sasak. Kata kunci: struktur ruang, budaya, dan Sasak.

PEMODELAN BANGKITAN PERGERAKAN PADA TATA GUNA LAHAN SEKOLAH DASAR SWASTA DI SURABAYA

In recent years, meshless methods have been developed as alternative numerical approaches in efforts to eliminate known drawbacks of the Finite Element Method (FEM). The main objective in developing meshless methods was to eliminate, or at least reduce, the difficulty of meshing and remeshing of complex structural elements. The nature of various approximation functions employed by meshless methods allows the definition of problem domains by simply adding or deleting nodes where desired. Nodal connectivity to form an element as in FEM method is not needed, only nodal coordinates and their domain of influence (DOI) are necessary to descretize the problem domain. Meshless methods may also reduce other problems associated with the FEM, such as solution degradation due to locking and severe element distortion [1].