DESIGN AND RELIABILITY EVALUATION OF SUSPENSION BRIDGE FOR PEDESTRIAN AND TWO WHEELS VEHICLES

• Main Author: WIDYANINGSIH - NIM : 25016009 , EUNEKE
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27004
• Institution: Institut Teknologi Bandung

<p align="justify">As a form of government concern for connecting infrastructure, especially for rural areas in Indonesia, the government is intensively built a long span suspension bridge for pedestrians and motorbikes with the intention of connecting villages, hopefully by better infrastructure the community in rural areas in Indonesia will be able to improve their economy. In response, the government issued a guideline for planning pedestrian suspension bridges in 2010 entitled Surat Edaran Menteri Pekerjaan Umum No. 02/SE/M/2010 concerning the Implementation of Guidelines for Planning and Construction of Suspension Bridges for Pedestrians. In the guideline the value of the uniform living load that must be able to be held by the bridge is 5 kPa. With reference to these guidelines, a suspension bridge is planned with total length of 127.34 meters. The maximum bridge deflection value due to the 5 kPa load is 433.63 mm, which is still smaller than the allowable deflection of 500 mm. The maximum cable stress obtained is 167.41 MPa which is also still smaller than the cable allowable stress of 372.96 MPa. The maximum hanger stress is 172.93 MPa which is smaller than the allowable steel stress of 200 MPa. The final element reviewed is the pillar element which has a maximum stress of 88.81 MPa which also still meets the steel allowable stress value for compressin of 97.63 MPa. After obtaining a safe bridge against the load from the guideline, an analysis is carried out using the moving load of the motorcycle and pedestrians to obtain which load positions will produce extreme conditions at each bridge element stress. In addition, to determine the dynamic behavior of the structure, dynamic evaluation is carried out which obtain the structure frequency values due to the single pedestrian load and 10 persons walking together. The result of frequency is 1.2 Hz for single pedestrian and 0.81 Hz for 10 pedestrians. While the natural frequency of the bridge structure is 0.368 Hz. The ratio of the two frequencies is 3.261 and 0.49 which indicates that the bridge structure may experience resonance if loaded with 10 persons walking together at the same time. Finally, the bridge structure was evaluated against 80 variations of vehicle and pedestrian loads. From the evaluation of the reliability of the structure using the variation of life load as is in real life, the result obtained that the reliability of the bridge structure is 100%. So, it can be said that the 5 kPa load required by the guidelines has a conservative value and will produce a very safe bridge structure. Keywords: Suspension Bridge, Pedestrian, Probability Based Design.<p align="justify"> <br />