Reliability analysis of a Super-T prestressed concrete girder at serviceability limit state to AS 5100:2017

Caprani, Colin C.; Melhem, Mayer M.; Siamphukdee, Kanjana

doi:10.1080/13287982.2017.1332843

Cited by 12 publications

(7 citation statements)

References 17 publications

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“…A more recent study by Caprani, Mayer and Siamphukdee [5] investigated the value of the reliability index for the Australian standard, using the European standard and a hybrid case as parameters for comparison.…”

Section: Calibration Of the International Standards For Prestressed C...mentioning

confidence: 99%

“…For the prestressing design, we used prestressed concrete level 3 (full prestressing) of standard NBR6118 [2]. The tendon used for prestressing is the same used in Caprani, Mayer and Siamphukdee [5], a tendon abiding by the specifications of the Australian standard AS 5100.5, as presented in Table 3. Table 4 presents the data used for the prestressing design and the result of the number of tendons.…”

Section: Design Of Beam 1 Prestressingmentioning

confidence: 99%

“…The limit state equations used in this study were the same as those used in Caprani, Mayer and Siamphukdee [5]. The consideration of creep adaptation results in different limit state equations.…”

Section: Limit State Equationsmentioning

confidence: 99%

“…So that this study could be compared to Caprani, Mayer and Siamphukdee [5], we have to convert the action model value into annual exceedance probability. For the conversion, the maximum moment due to the traffic loading is considered to follow a type-1 Gumbel distribution, as presented by Obrien et al [24] and and Stucchi and Luchi [30], and the value of the coefficient of variation (CV) is 0.18, as presented in Rakoczy and Nowak [28].…”

Section: Conversion Of the Traffic Load Model Value Into Annual Excee...mentioning

confidence: 99%

“…When the values of parameters u and θ of the gumbel distribution are unknown, as is our case, the ratio between them, called r, is used and is expressed as (Capriani Mayer and Siamphukdee [5]):…”

Section: Conversion Of the Traffic Load Model Value Into Annual Excee...mentioning

confidence: 99%

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Reliability analysis of a prestressed bridge beam designed in serviceability limit state as recommended by NBR 6118 and 7188

Lyra

Beck

Stucchi

2020

Rev. IBRACON Estrut. Mater.

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Nowadays it is known that it is important to study the safety of structures to avoid tragic accidents or economic losses. The most widely used method in the world to evaluate the safety of structures is structural reliability. The reliability index of prestressed precast beams of bridges designed using Brazilian standards (NBR6118 and NBR7188) is not known. This work evaluates the annual reliability indexes of a prestressed precast beam bridge at the serviceability limit state (SLS) projected using the Brazilian standard and compares it with results from the literature. The studied bridge has 33.5 meters of span, is simply supported, constituted by five precast concrete beams with U section. The reliability analysis was carried out using two methods for the four limit state equations: First Order Mean Value (FOMV) and First Order Reliability Method (FORM). Sensitivity analyzes were performed to consider both the relative contribution of these variables and the effect of their distributions on the annual reliability indexes for SLS. It was verified that the effect of load trains and the allowable stress significantly reduce the reliability index obtained for Brazilian standard. The service limit state equations are particularly sensitive to load trains, allowable stress and prestress losses, as well as their respective distributions.

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Section: Calibration Of the International Standards For Prestressed C...mentioning

confidence: 99%

Section: Design Of Beam 1 Prestressingmentioning

confidence: 99%

Section: Limit State Equationsmentioning

confidence: 99%