Innovative technique for identification of prestressing tendons layout in post-tensioned bridges using a probe with MEMS accelerometer

Owerko, Piotr; Honkisz, Marcin

doi:10.1080/15732479.2016.1212905

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…They are the simplified versions of real post-tensioned bridge cross-sections that are used in typical road bridges [17,18], [19]. The first three cross-sections are often present in double girder, double or triple-span viaducts crossing highways [20]. The section marked as "ILB" was inspired by members used in incrementally launched bridges (ILB) with vertical webs (omitting the deviators and external tendons) [21].…”

Section: Scope Assumptions and Meth-ods Of Probabilistic Analysismentioning

confidence: 99%

Theoretical Probabilistic Nonlinear Analysis of Post-Tensioned Bridge Cross-Sections with the Application of Random Fields

Owerko

2023

Architecture, Civil Engineering, Environment

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The paper presents a proprietary procedure for the analysis of normal stress distributions in post-tensioned cross-sections. It has a significant advantage over conventional commonly used approaches based solely on the envelope analysis as it provides stress levels in all components of the cross-section. The procedure was used in a series of probabilistic analyses with the adoption of random fields. These fields represented uncertainties in strain-stress relationship in concrete. The analysis covered several types of cross-sections and several types of random fields. Key observations from the conducted simulations are as follows: (I) the widest ranges of the probable maximum stresses (i.e. the lowest indexes of reliability) were obtained for sections with relatively low heights of the compressive zone. (II) The highest probabilistic sensitivity to the type of random field used was found in tall sections with a relatively large compressive zone. (III) The greatest sensitivity to batch uncertainties was evident in all cross-sections when using squared exponential random fields. (IV) The greatest relative sensitivity to the batch uncertainties in the form of the random field compliant with the guidelines of the Joint Comity of Structural Safety (JCSS) was evident in the analyses of the tallest cross-section corresponding to the incrementally launched bridges.

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Section: Scope Assumptions and Meth-ods Of Probabilistic Analysismentioning

confidence: 99%

Theoretical Probabilistic Nonlinear Analysis of Post-Tensioned Bridge Cross-Sections with the Application of Random Fields

Owerko

2023

Architecture, Civil Engineering, Environment

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“…Recently, PT concrete was used around the world as a mode of strengthening while producing strong, effective and slender structural elements as a result of its favorable mechanical properties (El-Zohairy and Salim, 2017; Dai et al , 2018). The technique has provided the opportunity to build structures that were thought impossible with RF concrete (Owerko and Honkisz, 2016). As PT concrete structures are deemed to have high levels of durability, it is commonly used in infrastructure (Zhang et al , 2017b).…”

Section: Literature Findingsmentioning

confidence: 99%

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Madhubhashana

Perera

2019

JEDT

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Purpose Many countries have started to use post-tensioned (PT) concrete because of its sustainability and low cost. However, it is not quite popular in Sri Lanka as the required knowhow and technology are not available within the country. By introducing PT concrete to the country, unwanted costs and time overruns could be eliminated from the construction projects. This paper, therefore, aims to identify the suitability and acceptability of PT concreting for/in Sri Lanka. Design/methodology/approach An extensive literature review was first carried out to gather knowledge on PT concreting. The four case studies that followed it included eight semi-structured interviews and a document review. Ten expert interviews were conducted finally to strengthen the findings of the literature review and case studies. Cross-case analysis and NVivo 11 content analysis software were used to analyze the data gathered. Findings Findings reveal that PT concreting saves cost and time of construction and that it can have a control over the resources required for construction, which makes it environment-friendly. PT concreting allows thinner concrete sections, extended spans, stiffer walls that resist lateral loads and stiffer foundations that resist the effects of shrinking and swelling soils. Originality/value It is found that PT concreting is more suitable for the construction industry in Sri Lanka than traditional concreting.

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Improved stack imaging of spectral amplitude based on the impact echo method for identification of defects in grout-filled lap connection

Yao

Chu

2023

Construction and Building Materials

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Innovative technique for identification of prestressing tendons layout in post-tensioned bridges using a probe with MEMS accelerometer

Cited by 6 publications

References 19 publications

Theoretical Probabilistic Nonlinear Analysis of Post-Tensioned Bridge Cross-Sections with the Application of Random Fields

Theoretical Probabilistic Nonlinear Analysis of Post-Tensioned Bridge Cross-Sections with the Application of Random Fields

Post-tensioned concreting: its suitability for and acceptability in Sri Lanka

Improved stack imaging of spectral amplitude based on the impact echo method for identification of defects in grout-filled lap connection

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