Incremental dynamic analysis of small to medium spans plain concrete arch bridges. (September 2018)

• Record Type: Journal Article
• Authors: Mahmoudi Moazam, A.; Hasani, N.; Yazdani, M.
• Is Part Of: Engineering failure analysis. Volume 91(2018)
• Page Start: 12
• Page End: 27
• Publication Date: 2018-09
• Subjects: Plain concrete arch bridge -- Finite element simulation -- Non-linear dynamic analysis -- Incremental dynamic analysis -- Seismic assessment; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2018.04.027
• Languages: English
• ISSNs: 1350-6307

Abstract

Abstract: There is a large number of old arch bridges in Iran's railway network which the majority of them have been built more than 70 years ago. These structures, though displaying a good performance under the effect of service (gravity) loads but the seismic (lateral) loads have not been taken into account in their design; therefore, the seismic assessment of these structures is deemed necessary for obtaining their failure and seismic performance levels. So they can be strengthened or rendered out of order in case it is found necessary. There are numerous methods for evaluating the residual capacity of the structures under seismic excitation which among them the non-linear dynamic analysis or the incremental dynamic analysis (IDA) is the most accurate and perfect method. Selecting 22 far-field earthquake records, the present study investigated two plain concrete arch bridges which are located in kilometers 23 and 24 of the old Tehran-Qom railway, respectively. By using the finite element method and the macro-modeling method the km-23 and km-24 bridges were simulated and totally 231 non-linear dynamic analyses have been conducted. The results obtained from the incremental dynamic analysis indicated that the seismic behavior of the bridge with longer span length is more vulnerable (km-23) than the bridge with lower span length (km-24). Generally, the seismic performance of plain concrete arch bridges has been found inappropriate, therefore to improve their performance it is necessary to retrofit these type of structures. Highlights: FE simulation has performed to evaluated seismic response of masonry arch bridges Incremental dynamic analysis (IDA) for far-field earthquakes has been conducted The statistical analysis of the obtained results indicated that the arch bridges perfectly obey the Gamma distribution IDA showed that the seismic behavior of these structures completely depends on their geometrical and mechanical features