Study On P- Delta Effect Of Large Space At Lower Part Of High-rise Buildings

Increasingly complicated modern architectural form, to meet the needs of the construction, structural design of some great slender column slenderness ratio.The high-rise buildings system can be simplified to one or more considering bending deformation and shear deformation of cantilever column combination of lateral force resistant system, High-rise buildings because of its high factor, structure is complex, in addition to from their own load, and from the function of horizontal wind load and earthquake force.For high-rise buildings, lateral effect (mainly refers to the wind and earthquake action) on the main control effect on the section size of structural elements.So the research for this kind of structure performance analysis is very important.For the problem of domestic has conducted the system research for many years, significant progress has been made.In order to replenish and further improve the structure of P-Δ effect analysis and design system, this paper briefly introduces the research situation of high-level structure nonlinear and specification for the design of the structure of P-Δ effect content and methods;To our specification given considering the effect of structure of P-Δ method are discussed in this paper;Summarizes and analyzes the current appeared in the structural design of P-A effect of thought of considering effect of delta, analyzes the factors that influence the structure stability and stress form and structure of P-Δ effect is taken into account in design of attention and the basic steps.By using finite element software on the basis of the theory of high-rise structures with large space at the bottom of the simulated earthquake and wind load analysis, force of the contrast model under static load, get a P-Δ effect for the influence of the model structure, and according to the result of can get big at the bottom of the preliminary frame of the high-level structure under the condition of the vibration state of stress distribution and lateral resistance.By using finite element software on the basis of the theory of high-rise structures with large space at the bottom of the simulated earthquake and wind load analysis, force of the contrast model under static load, get a P-delta effect for the influence of the model structure, and according to the result of can get big at the bottom of the preliminary frame of the high-level structure under the condition of the vibration state of stress distribution and lateral resistance.Through theoretical calculation, numerical simulation, and calculate the comprehensive analysis of the results of the three different approaches, in order to improve the safety of the design efficiency and economic benefit of enterprise.Finally, on the basis of summarizing the work in this paper puts forward some problems remain to be solved in this project.