Review article
Engineering model for the seismic analysis of complex existing viaduct
Tatjana Isaković
; University of Ljubljana, Faculty of Civil and Geodetic Engineering, Ljubljana, SLOVENIA
Abstract
The paper deals with the engineering modelling of the existing Downtown viaduct in Las Vegas, which has a very complicated structural system and seismic response. The structure consists of sixteen segments, which are supported by more than a hundred columns. The segments of the viaduct are connected within intermediate hinges. The connections change due to the atmospheric conditions as well as the intensity of the seismic load. Consequently, the structural system changes during the response. This makes the seismic analysis quite challenging. The paper presents a model of the viaduct intended for the non-linear dynamic analysis. The modelling of several elements, which are not usually included in the modelling of the viaducts is described. These elements are abutments, restrainers, shear keys, and different types of impacts. The influence of some important parameters on the response of the viaduct in Las Vegas is analysed. The properties of the abutments, properties of connection elements within the intermediate hinges and the size of the gaps of these elements have a crucial role in the viaduct response.
Keywords
seismic analysis, engineering model, viaduct, retrofitting, non-linear time-history analysis
Hrčak ID:
318794
URI
Publication date:
19.12.2002.
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