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of 16
pro vyhledávání: '"Jan-Erik Jonasson"'
Concrete cracks in structures such as water tanks and nuclear power stations cause anxiety to owners, contractors and engineers. These cracks may significantly increase the structure’s permeability and thus increase leakage, reduce durability, and
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Publikováno v:
Structural Engineering International. 26:216-224
Volumetric changes in early-age concrete that are restrained might lead to cracks. The degree of restraint is influenced by the casting sequence and the dimensions of the castings. In the current study, a new casting technique is proposed to reduce t
Publikováno v:
European Journal of Environmental and Civil Engineering. 22:226-245
Estimation of restraint is very important for accurately predicting the risk of early thermal and shrinkage cracking in concrete structures. The stress in young concrete is affected by changes in its dimensions during hydration and the restraint impo
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
Publikováno v:
Automation in Construction. 50:40-49
In this article, the System Identification approach is being used to identify the vertical frequencies of the top storey in a multi-storey building prefabricated from reinforced concrete in Stockho ...
Publikováno v:
Journal of Vibration and Control. 21:919-937
The utilization of structural control systems for alleviating the responses of civil engineering structures, under the effects of different kinds of dynamics loadings, has become a standard technology, although there are still numerous research appro
Autor:
Roland Pusch, Sven Knutsson, Jan-Erik Jonasson, Mats Emborg, Alireza Pourbakhtiar, Mohammed Hatem Mohammed, Nadhir Al-Ansari
Publikováno v:
Engineering. :765-774
Fractured, very permeable rock hosting repositories for radioactive waste will require grouting. New grout types of possible use where long-term performance is needed should have a small amount of cement for minimizing the increase in porosity that w
Autor:
Sofia Utsi, Jan-Erik Jonasson
Publikováno v:
Materials and Structures. 45:153-169
Cracking of concrete must be avoided during the hardening phase in order to minimize the risk of durability problems in the future, such as corrosion of the reinforcement, water tightness and damag ...
Autor:
Mårten Larson, Jan-Erik Jonasson
Publikováno v:
Journal of Advanced Concrete Technology. 1:172-187
Control of thermal cracking in young concrete is of great importance to ensure a desired service lifetime and function of a structure. Young concrete is here defined as the period up to approximately 100 days after casting. Making reliable prediction