Browsing SINTEF Open by Author "Popescu, Cosmin"
Now showing items 1-20 of 22
-
3D reconstruction of existing concrete bridges using optical methods
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Peer reviewed; Journal article, 2019)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ... -
A comparison between laser, scanning, photogrammetry and infrared scanning to create 3D digital models of existing concrete bridges
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Chapter, 2020)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ... -
A multi-level strategy for successively improved structural analysis of existing concrete bridges:examination using a prestressed concrete bridge tested to failure
Bagge, Niklas; Plos, Mario; Popescu, Cosmin (Journal article; Peer reviewed, 2018)This paper describes a multi-level strategy with increased complexity through four levels of structural analysis of concrete bridges. The concept was developed to provide a procedure that supports enhanced assessments with ... -
Assessment of RC walls with cut-out openings strengthened by FRP composites using a rigid-plastic approach
Popescu, Cosmin; Scmidt, Jacob W.; Goltermann, Per; Sas, Gabriel (Journal article; Peer reviewed, 2017)Building refurbishment works frequently require the cutting of new openings in concrete walls. Cutting new openings weakens the overall response of such elements, so they usually require strengthening. However, current ... -
Asset Management of Existing Concrete Bridges Using Digital Twins and BIM: a State-of-the-Art Literature Review
Saback, Vanessa; Popescu, Cosmin; Blanksvärd, Thomas; Täljsten, Björn (Peer reviewed; Journal article, 2022)The need to optimize investments in bridge maintenance has created a demand for improved bridge management systems (BMS). Outdated practices in bridge inspection and constant advances in information technology have also ... -
Axially Loaded RC Walls with Cutout Openings Strengthened with FRCM Composites
Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Journal article; Peer reviewed, 2018)Abstract: Upgrading existing buildings to new functional requirements may require new openings that can weaken the structure, prompting the need for strengthening. In such cases traditional strengthening solutions, such ... -
Concrete walls with cutout openings strengthened by FRP confinement
Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Peer reviewed; Journal article, 2017)Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction ... -
Corrosion-free concrete structures by the use of FRP (Fibre reinforced Polymers)
Björn, Täljsten; Popescu, Cosmin (Chapter, 2022)Fibre reinforced polymers may be suggested as a solution to one of the major durability problems with reinforced concrete; the corrosion of the internal steel reinforcement. The durability of fibre reinforced polymers, ... -
Experimental study on shear deformation of reinforced concrete beams using digital image correlation
Huang, Zheng; Tu, Yongming; Meng, Shaoping; Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel (Journal article; Peer reviewed, 2019)This paper presents an experimental program aimed at providing reliable and comprehensive experimental data for assessing the available models of predicting the shear deformation of diagonally-cracked reinforced concrete ... -
Failure tests on concrete bridges: Have we learnt the lessons?
Bagge, Niklas; Popescu, Cosmin; Elfgren, Lennart (Journal article; Peer reviewed, 2017)Full-scale failure tests of bridges are important for improving understanding of bridges’ behaviour and refining assessment methods. However, such experiments are challenging, often expensive, and thus rare. This paper ... -
Influence of large-scale asperities on the shear strength of concrete-rock interface of small buttress dams
Sas, Gabriel; Popescu, Cosmin; Bista, Dipen; Seger, Andreas; Arntsen, Bård (Peer reviewed; Journal article, 2021)This paper presents an investigation of the influence of large-scale asperities on the shear strength of four physical models of a pillar (also known as buttress web)from Kalhovd dam in Norway. The objective was to observe ... -
Local and global behavior of walls with cut-out openings in multi-story reinforced concrete buildings
Sabau, Cristian; Popescu, Cosmin; Bagge, Niklas; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Journal article; Peer reviewed, 2019)This paper presents the finite element analysis (FEA) results of a multi-story reinforced concrete (RC) building having precast and cast-in-place load bearing walls. Door-type cut-out openings (height: 2.1 m, width: 0.9–4.4 ... -
Non-destructive testing of prestressed concrete bridges - Experiments from field test
Holmquist, Mats; Täljsten, Björn; Popescu, Cosmin (Chapter, 2022)Most of the structures in the transport infrastructure are built of reinforced concrete, and many of our large bridges are built of prestressed concrete. A large part of these were built before 1980, and could theoretically ... -
Performance of RC Walls with Openings Strengthened by Fiber Reinforced Polymers: An Experimental and Theoretical Investigation
Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Chapter, 2017)Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction ... -
Prediction of Strain in Embedded Rebars for RC Member, Application of Hybrid Learning Approach
Mirzazade, Ali; Popescu, Cosmin; Täljsten, Björn (Peer reviewed; Journal article, 2023)The aim of this study was to find strains in embedded reinforcement by monitoring surface deformations. Compared with analytical methods, application of the machine learning regression technique imparts a noteworthy reduction ... -
Remote bridge inspection using optical methods
Popescu, Cosmin; Täljsten, Björn; Blanksvärd, Thomas; Elfgren, Lennart (Chapter, 2022)Routine bridge inspections usually consist of visual observations. These inspections are time-consuming and subjective. There is a need to identify new inspection techniques for infrastructure that reduce traffic disturbance, ... -
Review of FRCM strengthening solutions for structural wall panels
Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel; Blanksvärd, Thomas; Täljsten, Björn (Chapter, 2018)This paper summarizes the state-of-the-art on the topic of structural wall panels strengthened using fabric reinforced cementitious matrix composites (FRCM) composites. A systematic review of the literature is carried out ... -
Semi‑autonomous inspection for concrete structures using digital models and a hybrid approach based on deep learning and photogrammetry
Mirzazade, Ali; Popescu, Cosmin; Gonzalez-Libreros, Jaime; Blanksvärd, Thomas; Täljsten, Björn; Sas, Gabriel (Peer reviewed; Journal article, 2023)Bridge inspections are relied heavily on visual inspection, and usually conducted within limited time windows, typically at night, to minimize their impact on traffic. This makes it difficult to inspect every meter of the ... -
Strengthening of RC beams using bottom and side NSM reinforcement
Sabau, Cristian; Popescu, Cosmin; Sas, Gabriel; Schmidt, Jacob Wittrup; Blanksvärd, Thomas; Täljsten, Björn (Journal article; Peer reviewed, 2018) -
Structural health monitoring of a buttress dam using digital image correlation
Popescu, Cosmin; Sas, Gabriel; Arntsen, Bård (Chapter, 2019)In order to improve the knowledge of the real behaviour of existing structures,structural health monitoring (SHM) is usually carried out. Initial calculations of a buttress dam located in Norway has been carried out to ...