Abstract
This paper describes a historical arch bridge; its analytical modeling, modal testing and finite element model (FEM) updating. For this purpose, Senyuva historical arch bridge which is built in 1696 and located in Camlihemsin, Rize, Turkey, is selected as an application. 3D FEM of the bridge is modeled using ANSYS software to obtain analytical dynamic characteristics such as natural frequencies and mode shapes. Then, operational modal analysis using ambient vibrations is performed to attain dynamic characteristics experimentally. Human walking and wind are used as natural excitation. The output-only modal parameter identification is carried out using the Peak Picking method in frequency domain and the Stochastic Subspace Identification method in time domain. After, analytically and experimentally identified dynamic characteristics compared with each other and FEM of the historical bridge is updated to minimize the differences between modal parameters by changing uncertain modeling parameters such as boundary conditions. As a result, differences between the natural frequencies are reduced from 27% to 3% and good agreement is found between analytical and experimental dynamic characteristics after FEM updating.
Highlights
Historical bridges are one of the primary engineering structures constructed by people
Ambient excitation does not lend itself to Frequency Response Function (FRFs) or Impulse Response Function (IRFs) calculations because the input force is not measured in an ambient vibration test
Operational Modal Analysis is used to identify of the dynamic characteristics of Şenyuva historical arch bridge
Summary
Historical bridges are one of the primary engineering structures constructed by people. Frunzio et al (2001) investigated the 3D FEM analysis of a stone masonry arch bridge, involving non-linear material behaviour, in which the structural role of the spandrel walls and filling were involved Beside these studies many studies exist about the high-cyclic behaviour of concrete bridges (Dulinskas et al 2008), shape stabilization of steel suspension bridge (Juozapaitis et al 2008), assessment of quality in bridges and road construction (Zavadskas et al 2008; Zavadskas 2008), limit state and probabilistic analysis of bracing piers and concrete columns (Kudzys, Kliukas 2008, 2009; Mazzolani et al 2009), dynamic investigation of historical heritage (Kliukas et al 2008) and complex assessment methodology in bridges (Sivilevicius et al 2008). 3D FEM of the bridge is updated by changing boundary conditions
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