TL;DR: In this article, the authors conducted quasi-static tests on seismic behavior of two groups of composite shear walls with double steel plates and filled concrete to investigate the structural mechanism and the typical failure modes.
Abstract: Quasi-static tests on seismic behavior of two groups of composite shear walls with double steel plates and filled concrete were conducted to investigate the structural mechanism and the typical failure modes.In the tests,all the specimens illustrated good ductility and energy dissipation ability with stable and full hysteretic curves.The ultimate drifts of all the specimens exceeded the limit value recommended by the current design code,and were also larger than the similar test results provided by other researchers.Batten plates tied the double steel plates can effectively prevent the steel plates from local buckling and enhanced the confining effect on the infill concrete.As a result,the high-strength concrete can be used in seismic shear wall structures and the design requirements of 'high compression,high ductility and small thickness' for shear walls in super high-rise buildings can be fully satisfied.Based on the experimental research,theoretical analysis and numerical simulation were conducted,and the preliminary design recommendations for the application of the composite shear wall with double steel plates and filled concrete were further presented.The research work to be further conducted was finally proposed.From this research,it can be concluded that since the composite shear wall with double steel plates and filled concrete has good ductility,superior energy dissipation ability,and simple details requiring convenient construction methods and avoiding the exposure of concrete cracks,it has wide application prospect in super high-rise buildings.
TL;DR: Winkler foundation beam model was the basic model to study the problem of pile-soil interaction as mentioned in this paper, but reasonable improvements must be done in the application to make it more in line with project practical.
Abstract: Winkler foundation beam model was the basic model to study the problem of pile-soil interaction.Based on outlining the development process of Winkler foundation beam model,typical Winkler foundation beam models in different historical periods were described and evaluated.It was found that Winkler foundation beam model was simple and effective to describe the mechanical state of soil and its influence on the mechanical behavior of the structure,so as to solve the pile-soil interaction problems afterwards.However,reasonable improvements must be done in the application to make it more in line with project practical.