| The shear wall in super high-rise building structure bears heavy vertical loads and seismic action. If we still use the traditional reinforced concrete shear wall, excessively thick wall will result in control difficulties of over-all structure and increase in cost. So how to optimize the structure of the shear wall becomes the key to development of super high-rise building structure. Multi-cavity steel plate-concrete composite shear wall is characteristic of good bearing capacity, energy dissipation capacity and deformation capacity. At present domestic and foreign scholars do not have systematic research on this kind of shear wall.In this paper, a kind of multi-cavity steel plate-concrete composite shear wall was studied. Its mechanical properties and energy-dissipating capacity was explored in depth with the combined method of numerical simulation and theoretical analysis. The destruction process as well as stress mechanism was not only analyzed, but also the influence regularity on different cavity number shear wall properties with different parameters was summarized. The main contents are as follows:Firstly, three quasi-static tests of multi-cavity steel plate-concrete composite shear wall with the changing parameter equivalent to the number of cavity in steel plate were designed and completed. Then the effectiveness of different cavity number to destruction process, bearing capacity, hysteretic curve, skeleton curve, ductility, stiffness degradation and energy dissipation capacity of the shear wall were analyzed. And the results showed that this kind of shear wall had higher bearing capacity, excellent ductility and strong ability of energy dissipation.Secondly, numerical simulations to three experiment procedures by ABAQUS were performed, the accurate and effective modeling approach was put forward through comparing with the test results, and the availability of finite element modelling was verified. By means of the study of steel surface stress distribution of typical specimens in different load stages and strain development of the internal concrete, the destruction process and stress mechanism of shear wall were analyzed in depth and the stiffness of elastic region, yield strength, ultimate capacity, ductility of the shear wall with different cavity were sought out.Thirdly, through the simplified model, a large number of parametric analysis about mechanical property and energy dissipation capacity of multi-cavity steel plate-concrete composite shear wall was completed, the effect of cavity number, plate thickness, axial compression ratio, thickness of the wall, shear-span ratio, steel strength, the strength of concrete and other factors were considered among the parametric analysis. In the end, the influence regularity on specimen’s properties of different cavity by different parameters was discovered and summarized. |
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