International Journal of Scientific & Engineering Research, Volume 11, Issue 5 May-2020 ISSN 2229-5518 IJSER © 2020 http://www.ijser.org Design Analysis of Loading Structures in The Baruta Cable-Stayed Bridge Construction using Hand Method Sunaryo 1 , La Ode M Magribi 2 , Minson Simatupang 3 , Adris A Putra 4 and M Thahir Azikin 5 ABSTRACT- The purpose of this study was to determine the forces that occur in the construction of stayed cable structure bridges using the philosophy of the triangle and Pythagoras. The research method is to use the triangle philosophy and Pythagoras will be used to design the bridge cable-stayed bridge construction, the design is done using hand-method or manual method by utilizing the help of the goodness of Microsoft Excel. In this study only looks for unknown dimensions that will be used to look for forces that occur due to live and dead loads, then we will get a description of the forces that occur and the total forces that occur. The result of this research is the force that propagates on a cable and is held by a column, but the column is tilted and forms a certain angle away from the Y axis and approaches the X axis, then the amount of force will be accepted by the column, but the magnitude of the force is not the same as the force planned, the magnitude of the force that occurs will be large, according to the angle of the cable and the angle of the column itself. Keywords: Cable-stayed, Loads, Forces, Hand Method, Manual Method, Formula Text, Microsoft Excel. —————————— ◆ —————————— 1 INTRODUCTION he bridge maintenance system and the monitoring and supervision of the bridge are very necessary, especially on the bridges of the cable hanging system, whatever its type [1], any type of suspension cable bridge must receive routine maintenance and regular maintenance, if not done it will be fatal and can be fatal endanger. Inspections are carried out on the structure of steel cables, bolts, rubber platforms, concrete structures and all components used to support bridge construction. The maintenance of bridges in this era is sophisticated, can be controlled remotely using an IT system, but it must be supported by a reliable network and what difficulties will it have if the availability of networks in remote areas where steel bridges are generally located. Then the bridge maintenance system must still be done manually. A bridge model, both a regular span girder bridge and especially on bridges that use cables as load-bearing, needs special attention regarding initial planning with the addition of earthquake loads [2], a combination of dead load, live load and earthquake load and added to the load - other expenses, it is of particular concern to the planners of bridges and other civil buildings. Why is that, this is because all burdens will greatly affect the construction structure, therefore all burdens together will still burden and inevitably will occur. It's just that in planning an engineer will calculate starting from the live load and dead load, then the earthquake load will be calculated based on the value of the two previous loads. Earthquake loads will not work or will not appear if live loads and dead loads do not exist as well as wind loads. Concrete bridges or steel frame bridges, especially the bridge using cables as the main support, which is used for trains is very vulnerable and affected by vibrations [1,2], the planning of the issue of vibration is also a thought that needs attention. However the strength of construction will usually be greatly influenced by the emergence of vibrations, it's just that in determining the loading, vibration is not included in the load category even though the shock due to vibration is very strong and felt. So the engineers are looking for a solution with what is called vibration dampening, it is not 100% able to eliminate vibrations, but the actual vibration can be reduced, thus appearing a vibration-damping device such as spicy, clutch, absorber and other types. But there is also that train vibrations can be overcome by including in modeling using the SAP2000 application [3], vibrations of a side effect of energy use, non-dense are avoided and will remain. A strong construction model for the railroad bridge, vibration will still occur, and can not be avoided except the addition of other devices. Cracks in bridge concrete are the things that we often encounter in lanate construction and bridge girder [4,5], this is due to several factors, such as the influence of hot temperatures and expansion will occur, due to the load so that the steel reinforcement experiences elasticity and concrete itself does not experience elasticity, but if in a reasonable gap this is not a problem, there are also other causes. In general, concrete bridge T ———————————————— • Sunaryo, Lecturer in Civil Engineering, Sulawesi Tenggara University, Kendari, Indonesia. 1@sunaryocim.com • La Ode M Magribi, Lecturer in Civil Engineering, Sulawesi Tenggara University, Kendari, Indonesia, obi_magribi@yahoo.com • Minson Simatupang, Lecturer in Civil Engineering, Sulawesi Tenggara University, Kendari, Indonesia, minson.simatupang@uho.ac.id • Adris A Putra, Lecturer in Civil Engineering, Sulawesi Tenggara University, Kendari, Indonesia, putra_adris@yahoo.com • M Thahir Azikin, Lecturer in Civil Engineering, Sulawesi Tenggara University, Kendari, Indonesia, thahir.azikin@uho.ac.id 829 IJSER