Journal of the Civil Engineering Forum
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ACCURACY OF INDEX FLOOD METHOD APPLIED IN TWO DIFFERENT REGIONS IN INDONESIA
Full text linkProblems of having relatively accurate estimates of design discharge values in ungauged catchments remains. There is an empirical equation in the area which gives appropriate estimates, but it needs some efforts in measuring catchment parameters, which is time consuming in line with the catchment area. A relatively simple method in doing so is the known Index Flood Method. The accuracy of this method in its application in Indonesia has never been examined. An understanding of its accuracy will provide the design with more confidence. Keywords: Index flood method, direct flood method
THERMAL INSULATION EFFECTS ON ENERGY EFFICIENCY OF BUILDING STRUCTURES
Full text linkThis paper presents the use of Finite Element Method for heat transfer analysis. Connections wall-beam-floor structures with different positions of the thermal insulation have been analyzed and conclusions about energy efficiency and energy loss are made. Keywords: heat transfer, numerical analysis, finite elements, thermal insulation, energy efficiency
STRENGTH AND DUCTILITY OF REINFORCED CONCRETE T-BEAMS STRENGTHENED IN THE NEGATIVE MOMENT REGION WITH WIRE ROPE AND MORTAR COMPOSITE
Full text linkThe loss due to collapsing structure includes not only materials but also lives. In the case of a change in structure function that may cause increasing loads, it is required to put efforts in strengthening the structure elements in order to increase the capacity and hence to avoid the possibility of collapsing. The objective of this research is to find out the behavior of T-sectional reinforced concrete beam strengthened in the negative moment region with wire rope and mortar composite. The test was carried out on three T-sectional beams: without wire rope reinforcement (BK), with 2 wire rope reinforcements (BP1), and with 4 wire rope (BP2) reinforcements. The type of wire rope was Independent Wire rope Core (IWRC) with a 10 mm diameter. The testing method used was two points static loading with flens positions below (the flens part experienced tensile stress). Results showed that the maximum load carrying capacity of BP1 and BP2 specimens increased by ratios of 1.59 and 2.03 to the BK specimen, respectively. However, the increase was achieved after the development and propagation of high cracking. Ductility of BP1 and BP2 specimens decreased with a ratio of 0.62 to 0.36 to the BK specimen, respectively. The initial stiffness of BP1 and BP2 increased with a ratio of 1.09 to 1.08 to the BK specimen, respectively. The effective stiffness of BP1 and BP2 specimens decreased with a ratio of 0.88 to 0.92 to the BK specimen, respectively. Stress occurred in the wire rope based on the analysis results of Response-2000 and the layer method did not reach 50% of the ultimate stress resulting from the preliminary test. In general, unless improvement was made to the stiffness characteristics of the wire rope, its contribution would not become optimum. Keyword: Wire rope, mortar, flexural behaviour
STABILITY OF UNDERWATER STRUCTURE UNDER WAVE ATTACK
Full text linkGeotube is, among others, a type of coastal structure that is increasingly accepted for coastal protection especially underwater breakwater. Besides its relatively low cost, it has other advantages such as flexibility, ease of construction and the fact that it can be filled with local sand material. Similar to all other coastal structures, it should also be stable under wave attack. A simple theoretical approach based on linear wave was adopted to estimate the stability of such structure. The theoretical solution was then compared with an experimental study. The experimental study was conducted at the Hydraulics and Hydrology Laboratory of Universitas Gadjah Mada. However, instead of a real geotube, PVC pipe was used where the weight of the PVC was varied by adjusting the volume of sand in the pipe. The result indicated that the agreement between the theoretical solution and the experiment was encouraging. The analytical solution may be utilized to predict underwater pipe stability under wave attack with certain degree of accuracy
PERFORMANCE ANALYSIS ON FREIGHT TRANSPORTATION IN FURNITURE INDUSTRY, A CASE STUDY IN BANTUL, YOGYAKARTA, INDONESIA
Full text linkThe Supply Chain Management is a new philosophy encouraging internal and external integration which encompass all the aspects, from the supplier until down to the customers. Transportation plays a major role in achieving efficiency and effectiveness because the role of transportation in the Supply Chain is as the intermediary help to distribute the physical goods from one entity to another entity. For this reason, the objective of this research is to analyse and measure the effectiveness and efficiency of inbound and outbound logistics in the furniture industry in Bantul, Yogyakarta. Firstly, the author will try to draw the supply chain mapping in order to gain more understanding about the entities in the supply chain. Secondly, performance of the transportation modes that will be used to move the furniture will be assessed through questionnaire. Thirdly, the author will try to analyse the response if rail transportation is proposed as an alternative transportation mode to move the goods. Lastly, conclusion and recommendation regarding the issue will be derived as implied in the result from data analysis. Keywords: Supply chain management, transportation, performance, furniture industry