ANALYSIS OF HIGH-RISE FRAME STRUCTURES WITH CONSTRUCTION PROCESS, CREEP AND SHRINKAGE EFFECTS
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The key problem for displacement method in creep and shrinkage effect analysis of statically indeterminate structures is to determinate inelastic fixed-end forces caused by creep and shrinkage of the element. Based on the concepts of force method and virtual-work principle, calculation formulae of the inelastic fixed-end forces in structure elements are deduced. The methods for considering the effects of construction process, creep and shrinkage in the analysis of high-rise frame structures are then introduced. The corresponding computational procedure was programmed using FORTRAN language. Creep and shrinkage analysis of a frame structure was conducted by using this program. The results show that creep, shrinkage and construction process have great effects on the mechanical and deformational performances of high-rise frame structures. These effects should be taken into accounts in the design of high-rise frame structures.