Influence on crack development in concrete structures from imposed strains and varying boundary conditions |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China;2. School of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China;1. Universidad San Francisco de Quito, Politecnico, Diego de Robles y Vía Interoceánica, Quito, Ecuador;2. Delft University of Technology, Concrete Structures, Stevinweg 1, 2628 CN Delft, The Netherlands;3. Ministry of Infrastructure and the Environment, Griffioenlaan 2, 3526 LA Utrecht, The Netherlands;1. Department of Structural Engineering, Faculty of Engineering, Tanta University, Tanta, Egypt;2. Construction Engineering and Management Department, Faculty of Engineering, Pharos University, Alexandria, Egypt;1. Universidad San Francisco de Quito, Politecnico, Diego de Robles y Vía Interoceánica, Quito, Ecuador;2. Delft University of Technology, Concrete Structures, Stevinweg 1, 2628 CN Delft, The Netherlands;3. Adstren, Plaza del Rancho, Of. 203, Via Tanda, Cumbaya, Quito, Ecuador;4. Ministry of Infrastructure and the Environment, Griffioenlaan 2, 3526 LA Utrecht, The Netherlands |
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| Abstract: | Crack development due to imposed strains in different types of concrete structures and with varying boundary conditions is studied in order to improve control of cracking. A previously developed two-dimensional FE-method is used, with closing forces in cracks concentrated to spring elements. Temperature changes are used as load, and the calculations are performed stepwise with opening of nodes and implementation of spring elements. The FE-method has also been used to study crack widths and crack spacing for a wall fully restrained at the bottom. It is shown that the type of restraint has significant influence on crack widths. For structures with restraint along the length direction the restraint effectively facilitates distribution of cracking, similar to a wall fully restrained at the bottom. |
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