Temperature Field and Its Effects on a Long-span Steel Cable-stayed Bridge Based on Monitoring Data
Year: 2013
Type: conference-paper
Abstract: In last two decades, structural health monitoring (SHM) technology has been widely and systematically employed for civil engineering structures, especially on long-span bridges around the world.A good SHM system could provide massive amounts of information for structural engineers to facilitate the management and maintenance of complicated structures.It is still a hot research topic that how to make better use of monitoring data among academic researchers and practical engineers.This paper investigated the temperature field and its effects based on the SHM data of a long-span cable-stayed bridge in Shanghai, China, which has the span arrangement of 92+258+730+258+72 m, completed in 2010.The daily and seasonal temperature variations and thermal induced structural responses, in terms of the deformation of tower and girder, the cable force, and the strain at the mid-span section of girder, were taken into consideration.The monitored data were presented in a summary manner and were further compared with the analytical results of a finite element (FE) model.A good agreement in the variation trend between the field measurements and the analytical results was reached.The main conclusions of the study include: 1) The structural temperature distribution pattern of the bridge can be explained by the basic heat transfer conditions, i.e. radiation, conduction and convection; the structural temperature is significantly different from the ambient temperature; 2) The thermal-induced structural responses have daily and seasonal cycles.For the daily cycle, the relationship of the response parameters and the girder's average temperature could be modeled by a linear formula.However, the mechanism behind these phenomena deserves a further study; 3) The FE model on the basis of physical meaning could grasp the basic trends of the thermal effects.The analysis here could provide us invaluable information on the behavior of long-span cable-stayed bridge with a floating girder system; additionally, it would benefit the development of SHM technology in return.
Authors: Yi Zhou, Limin Sun, Shouwang Sun
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W153876314