Ce. Ventura et Nd. Schuster, STRUCTURAL DYNAMIC PROPERTIES OF A REINFORCED-CONCRETE HIGH-RISE BUILDING DURING CONSTRUCTION, Canadian journal of civil engineering, 23(4), 1996, pp. 950-972
This paper presents the results of a study on the variability of the d
ynamic properties of an irregular high-rise building during its constr
uction. Most of the knowledge about structural dynamics of high-rise r
einforced concrete buildings is based on uniform structures. Hence, th
ere is concern about extrapolating this knowledge to the behaviour of
nonuniform building that emerge from current architectural trends. A c
lear example of these trends is the building selected for this study.
This 30-storey reinforced concrete building is representative of the t
ype of current construction in Vancouver, British Columbia. The latera
l force resisting system in this structure is uniform in plan and elev
ation, while the distribution of storey mass is asymmetrical owing to
its geometry as well as a major setback at one corner. Dynamic charact
eristics were determined by analyzing ambient vibrations of the struct
ure. The objectives of this study included determining natural frequen
cies and corresponding mode shapes, determining the effect of architec
tural components, assessing base motion, and assessing the manner of t
he core's deformation. In addition, a three-dimensional dynamic analys
is was performed to assess the accuracy of modeling techniques. Finall
y, base shears and overturning moments during different stages of cons
truction were assessed in accordance with current building codes.