Reduction of stress concentration by polymer flexible joints in seismic protection of masonry infill walls in RC frames

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Kwiecie, A.^1

Department of Civil Engineering, Cracow University of Technology, Warszawska 24, Cracow

31-155, Poland^1

关键词: Dissipation energy;    Flexible joints;    Laboratory shear tests;    Masonry infills;    Polymer flexible joints;    Seismic protection;    Simultaneous transfer;    Structural ductility;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012003/pdf
DOI  :  10.1088/1757-899X/474/1/012003

来源: IOP

【 摘 要 】

In the paper, the phenomenon of stress concentration occurring in brittle structural materials of infill structures is discussed. Four innovative repair methods based on flexible joints made of polyurethane PM are presented. They provide a reduction of the stress concentration and improvethe structural ductility. The effectiveness of newly proposed timber-polyurethane dissipative struts is proved by laboratory shear tests, which results are discussed in detail. The calculated dissipation energy and stiffness of the proposed system ensures a simultaneous transfer of loads and large deformations occurring during an earthquake to the introduced dissipative struts and improves the system safety. The recommended repair methods can be used efficiently by emergency teams in seismic areas.