Abstract
This paper presents an evaluation study of the performance of reinforced concrete arch bridge structures under earthquake load. The study is aimed to investigate the seismic performance of Wreksodiningrat Bridge, located in the province of Yogyakarta, Indonesia. This bridge is a three spans reinforced concrete arch bridge with a main span length of 75 m and two side spans with a length of 35 m, respectively. This study is a part of a large project carried out by the Ministry of Public Works to study the impact of the new 2016 Indonesia Seismic Design Code for Bridges (SNI 2833:2016). The main objective of this paper is to determine the displacement demands due to earthquake load based on the new seismic code design for bridges, SNI 2833:2016. In addition, demand capacity ratios (D/C) of the main structural components, such as the compression arch and main column (pier) at the fixed support, are also reviewed in this paper. The analysis was carried out using nonlinear modal pushover analysis. The arch bridge modeling is three dimensional, where structural elements such as beams, columns, and compression arches are modeled as frame elements. The plastic hinges are modeled as fiber hinges with unconfined and confined concrete material stress-strain relationship following Mander formula. The analysis result shows that the displacement demands of the bridge are 2.9 cm and 20 cm in the longitudinal and transverse direction, respectively. The D/C ratios of the compression arch due to demand earthquake load are 0.74 and 0.95 in the longitudinal and transverse direction of the bridge, while the D/C ratios of the pier are 0.15 and 0.80 in the longitudinal and transverse direction. Based on the above results, it is concluded that the studied bridge is able to withstand the seismic load requirements in the new Indonesia Seismic Design Code.
Highlights
The need for performance evaluation of existing bridges against earthquake load has become an important issue in Indonesia lately
Nonlinear time history analysis is the most rigorous to compute the seismic demand of the bridge
One of the developed methods using pushover analysis is Modal Pushover Analysis (MPA). This method has been developed to evaluate the inelastic responses of building structures [3, 4, 5], but recently has been widely applied to bridge structures and compared to nonlinear time history analysis (NL-THA) method for its accuracy and it was concluded that MPA has a good degree of accuracy to predict inelastic responses of bridge structure against earthquake load [6, 7, 8]
Summary
The need for performance evaluation of existing bridges against earthquake load has become an important issue in Indonesia lately. Two methods that quite often used to evaluate bridge performance under earthquake load are nonlinear time history analysis (NL-THA) and pushover analysis. Nonlinear time history analysis is the most rigorous to compute the seismic demand of the bridge. This analysis is time-consuming, and it is rarely used for seismic performance evaluation in Indonesia. This method has been developed to evaluate the inelastic responses of building structures [3, 4, 5], but recently has been widely applied to bridge structures and compared to NL-THA method for its accuracy and it was concluded that MPA has a good degree of accuracy to predict inelastic responses of bridge structure against earthquake load [6, 7, 8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
