Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Niklas Grip"'
Autor:
Jiwen Zhang, Natalia Sabourova, Lennart Elfgren, Chao Wang, Thomas Blanksvärd, Yongming Tu, Niklas Grip
Publikováno v:
Structure and Infrastructure Engineering. 16:861-879
This article proposes a method for assessing fatigue damage in reinforced concrete bridges based on a train-bridge coupled dynamic analysis system. The analysis system can be used to perform couple...
Autor:
Gabriel Sas, Xiao-chuan Qin, Natalia Sabourova, Thomas Blanksvärd, Lennart Elfgren, Yongming Tu, Cao Dafu, Shao-ping Meng, Niklas Grip, Ulf Ohlsson
Publikováno v:
Construction and Building Materials. 125:892-904
The pore structure of the hardened concrete and the microscopic changes of a few selected pores throughout the freeze-thaw test were investigated by a method combining RapidAir and digital metalloscope. Traditional tests were also performed to evalua
Autor:
Yongming Tu, Lennart Elfgren, Ulf Ohlsson, Niklas Grip, Natalia Sabourova, Domagoj Damjanović, Ivan Duvnjak
Publikováno v:
Scopus-Elsevier
Damage assessment of structures includes estimation of location and severity of damage. Quite often it is done by using changes of dynamic properties, such as natural frequencies, mode shapes and damping ratios, determined on undamaged and damaged st
Autor:
Natalia Sabourova, Lennart Elfgren, Niklas Grip, Ivan Duvnjak, Ulf Ohlsson, Yongming Tu, Domagoj Damjanović
Publikováno v:
Scopus-Elsevier
Structural damage is often a spatially sparse phenomenon, i.e. it occurs only in a small part of the structure. This property of damage has not been utilized in the field of structural damage identification until quite recently, when the sparsity-bas
Publikováno v:
The IES Journal Part A: Civil & Structural Engineering. 8:131-144
The linear, time-invariant transfer function has been utilised for the construction of frequency response function , based on the ambient vibration measurements. The results presented here indicated the possibility to identify and localise damages in
Autor:
Xiao-chuan Qin, Ulf Ohlsson, Thomas Blanksvärd, Lennart Elfgren, Niklas Grip, Cao Dafu, Natalia Sabourova, Shao-ping Meng, Yongming Tu
Publikováno v:
Structure and Infrastructure Engineering. 12:159-170
Prestressed concrete structures are considered to be reliable and durable. However, their long-term performance when subjected to frost attack is still unclear. In this work, experiments were carried out to evaluate the prestress losses in post-tensi
Publikováno v:
Applied Energy. 112:1032-1040
The surplus energy in rest gases is an important by-product in the SSAB EMEA steel plant in Luleå. The surplus is used in a local heat and power plant. Studies have been and are being carried out to find alternative use for the high calorific gases,
Publikováno v:
Scopus-Elsevier
The dynamic response of a concrete railway arch bridge is studied through a case study of the bridge over Kalix River, situated at Långforsen on the railway line between Kalix and Morjärv in northern Sweden. A simplified beam-element model, a spati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79c59742a22d30c507e1c348b906a239
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62172
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-62172
Publikováno v:
IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment.
A five-span prestressed concrete bridge has been subjected to a loading test up to failure in Kiruna, Sweden. The bridge was 55 years old and had a length of 121.5 m. The test has been used to validate and calibrate existing nonlinear finite element
Sensitivity-based Finite Element Model Updating (FEMU) is one of the widely accepted techniques used for damage identification in structures. FEMU can be formulated as a numerical optimization problem and solved iteratively making automatic updating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46493a9f16eba1ca4e4a9b42adc4aeb1