Comparison and calibration of numerical models from monitoring data of a reinforced concrete highway bridge

Abstract

The last four decades were important for the Brazilian highway system. Financial investments were made so it could expand and many structural solutions for bridges and viaducts were developed. In parallel, there was a significant raise of pathologies in these structures, due to lack of maintenance procedures. Thus, this paper main purpose is to create a short-term monitoring plan in order to check the structural behavior of a curved highway concrete bridge in current use. A bridge was chosen as a case study. A hierarchy of six numerical models is shown, so it can validate the bridge's structural behaviour. The acquired data from the monitoring was compared with the finest models so a calibration could be made.

Dynamic Monitoring vertical Deflectionof Small Concrete Bridge Using Conventional Sensors And 100 Hz GPS Receivers - Preliminary Results

“…Five elastic-linear models were studied and created and one non-linear model using the SAP2000® V14 and Midas Fx+ for DIANA® softwares [1] The dynamic analysis was performed in order to obtain parameters that canevaluate the structural behavior under free vibration. The spectral content analyzed enabled to verify themost excited frequencies, which may correspond to the first symmetric bending frequencies in the longitudinal vertical plane of the bridge.…”

“…Figure 6 shows the identification and location of the sensors and transducers used in the monitoring campaign carried out in 2011. The S1 session data were compared with the GPS collected data for exhibiting the largest vertical displacement of 3.55 mm [1] Figure 6 -Instrumentation layout of the 30 m bridge span over the Jaguari river [1]. Figure 7 -The test load vehicle used in the test over the bridge [1].…”

“…Regarding the special structural works in the city of São Paulo, the study shows that there are 240 bridges and overpasses in state of deteriorationexhibiting various pathologies and posing risks to the users. One of the main factors highlighted for the deterioration regardsinsignificantconservation investments in recent years, corresponding to 0.38% of the final construction cost [18], [1].…”

Uso De Receptores GPS De 100 Hz Na Detecção De Deflexões Verticais Milimétricas De Pontes De Concreto De Pequeno Porte

“…Ponte em estudo, sobre o rio Jaguari (Fonte: Andrade et al, 2013) Nesta fase do estudo optou-se pela ponte sul em função de sua característica e do tráfego no local. A largura total do tabuleiro é de 11,7 m, destes 10,9 m são divididos pelas duas faixas de tráfego e por uma faixa de acostamento, mais 0,4 m para todos os guarda-rodas do tipo New-Jersey constituídos em concreto armado (Andrade et al, 2013).…”

“…Em relação às obras de arte especiais na cidade de São Paulo, o estudo mostra que há 240 pontes e viadutos em estado de deterioração, apresentando diversas patologias, e oferecendo risco aos usuários. Um dos principais fatores em destaque para a deterioração é atribuído ao investimento ínfimo em manutenção nos últimos anos, correspondente a 0,38% do custo final das obras (Sinaenco, 2011;Andrade et al, 2013). A deterioração se reflete de diversas formas, como exposição de armaduras por falta de manutenção ou provocada por batidas de caminhões com excesso de altura, com consequente carbonatação; trincas, rachaduras com mais de 3 cm de espessura, eflorescência e lixiviação; desplacamento com pontos de infiltração; solapamento de taludes na região dos pilares; pilares com segregação da seção (http://www.sinaenco.com.br/default.asp).…”