Study on design and strengthening measures of weakly connected diaphragm of high-rise structure with concave convex irregular plane
For the high-rise structure with concave convex irregular plane composed of a central area and several extended wings connected by the weakly connected diaphragm,the weak connection between the wings and central area was subjected to complex forces due to the weakly structural rigidity of the wings.How to calculate the internal forces of the sections is the key to the design of weakly connected diaphragm.Except the slabs,shear walls and edge beams also had played important roles in the transmission of horizontal force between the wings and central area.Based on the existing research and combined with engineering practice,different calculation methods for the section internal force of the weakly connected diaphragm were compared.The impact of structure height,partial layout and width of connecting slab on the stress of weakly connected diaphragm was analyzed.Simultaneously,the force mechanism and damage characteristics of the weakly connected diaphragm were studied by using elastic time history analysis and multi-scale finite element analysis.Based on analysis results and engineering experience,the targeted strengthening measures for weakly connected diaphragm were summarized from the aspects of layout principles,calculation method and construction.
weakly connected diaphragmconcave convex irregular planeshear force distributionfinite element analysisperformance-based seismic designstrengthening mearsure
NETL
NSTL
万方数据
