ANALYSIS OF THE BEHAVIOR HIGH PILLAR OF CONTINUOUS SPANS BRIDGES DUE TO THE EARTHQUAKE

• Main Author: Suyadi
• Format: Theses
• Language: Indonesia
• Subjects: Teknik sipil
• Online Access: https://digilib.itb.ac.id/gdl/view/45820
• Institution: Institut Teknologi Bandung

Roads and bridges are infrastructure of transport which cannot be separated. Often in the field required to use the bridge with a long span. The convenience of the user is an important variable to determine the type and model of bridges of long span. Generally speaking, the bridges with continuous lights may be an option to overcome it. Also taking into account different things, sometimes the placement of the bridge is planned a combination of simple and continuous sections. No one can deny that nowadays many of natural phenomena as earthquakes that frequently hit the Indonesia region, either with the strength of small or large earthquakes, it needs to be some covers alternative models bridge, it runs continuously, the choice of the location and so simple that you can include model selection is determined by the behavior of seismic loading is the best. That is why the necessary evaluations So that more research should be done about a behavioural aspects of continuous spans of the bridge piers from earthquake loads. On the basis of the existing maps earthquake, PSHA methods and peta hazard map of draft SNI 2010 may be three (3) spectral characteristic data model parameters to be used as input earthquake loads based on PGA value earthquake map SNI 03-1726-2002; PGA value risk map of draft SNI 2010 and values based on calculation of function PSHA with Donovan 1970 function Attenuation. This analysis using 5 (five) bridge model from their sites and the positions of the continous span are Model I (all continuous span); Model II (only span 2, 3 and 4 continous); Model III (only span 1, 2, 4 and 5 continous); Model IV (only span 1, 3 and 5 continuous) and model (only span 3 continuous). In the research use fixed footing assumption, so there is no deformation of the bridge due to the interaction of members of the Foundation. With each of these models will be considered performance Levels of performance of each model will be reviewed every bridge in the existing seismic loads. With Pushover methods using SAP software in 2000 obtained a value of displacement of demand and capacity, so we can know the feasibility of the pier of the bridge are modeled. The structures which have a mass will experience instability due to perturbations external force. As it was the case in the bridge, the displacement of the structure of the bridge must be able to keep the constituent elements of the structure of the bridge. In this study the element is the pier of the bridge. According to the results of the analyses generated the general structure, only the model of II and V that is able to resist seismic forces on the basis on the analysis of ?_D^L ??_C^L and ?_D^T ??_C^T The amount of longitudinal displacement experienced by the pier P1 is almost similar to that experienced by the displacement of the pier P2, except for the model IV. The values of ductility is defined as the ability of a structure to large deformations without collapse for multiple piers ? 5. The results obtained from analyzing, all the pier of the different models up to standards of ductility. The values of ductility in the model II is bigger than the others.