RELIABILITY EVALUATION OF CABLE STAYED BRIDGE STRUCTURE USING MONTE CARLO SIMULATION AND INTEGRAL RISK

• Main Author: HERVIANI PUTRI (NIM : 25015315), WINDA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/31639
• Institution: Institut Teknologi Bandung

<p align="justify">of bridge must have a good design and have a long life so so that the mobility of vehicles passing through it is not inhibited. The design of the bridge follows the applicable regulatory standards of SNI 1725-2016 and RSNI 2833-201X. The load combination on SNI 1725-2016 has been selected as a standard for design planning in order to produce extreme conditions due to work load. The extreme conditions of the bridge are affected by the type and span of the bridge, this can be tested by loading experiments based on each distribution of the load on the bridge. Research on reliability evaluation on bridge structures using monte carlo simulations and risk integral on cable stayed bridges is done to ensure that bridges are able to restrain the loads assigned to the structure. <br /> <br /> <br /> The bridge reviewed in this research is cable stayed bridge with span 200 m which is analyzed with Jakarta location. Reliability and probability of failure analysis on cable stayed bridge is done due to gravity load and earthquake load. Reliability analysis due to gravity load is done in the construction stage and post construction by using monte carlo simulation. The reliability results of monte carlo simulation will be compared with reliability results using first order method second order method. For reliability analysis using earthquake load is done by using risk integral. Earthquake loads are performed using a material nonlinear time history by incremental dynamic analysis. <br /> <br /> <br /> From the analysis result using monte carlo simulation obtained 99.99% reliability with PF = 7 x 10-5 and &#946; = 3.8 for construction stage and for post construction obtained reliability 99.93% and PF = 6.8 x 10-4 with &#946; = 3.2. The probability of failure using first order second moment method is greater than monte carlo simulation. The difference of probability occurs because in monte carlo simulation the probability of failure is obtained from the limited sampling result, whereas in first order second moment method the magnitude of probability is calculated based on the infinite distribution area. For reliability analysis with risk integral, 99.99% structure reliability was obtained with PF = 3.1×&#12310;10&#12311;^(-5) and &#946; = 4. When calculated at 50 years of age bridge obtained PF = 1,5×&#12310;10&#12311;^(-3). The probability of failure on the bridge is greater than the target of building collapse risk according to SNI 1726-2012 is 1% at the age of 50 years. This is in accordance with the provision that the bridge structure should be designed to be more resistant to earthquake compared to the structure of the building so that when an earthquake comes and destroys the building, the bridge can still be used as access to distribute aid. <p align="justify"> <br />