EXPERIMENTAL INVESTIGATION AND DYNAMIC SIMULATIONS OFLOW-RISE STEEL BUILDINGS FOR EFFICIENT SEISMIC DESIGN

摘要

This paper presents an overview of an ongoing research project that was initiated to better understand thedynamic behaviour of low-rise steel buildings that rely on metal roof deck diaphragm response for lateralseismic resistance. The project includes a large ambient and forced vibration test program on actualbuilding structures located both in eastern and western regions of Canada. Test results include naturalfrequencies, mode shapes, and damping ratios. For several buildings, tests are conducted at various stagesduring the construction so that the contribution of the different building components to the dynamicproperties of the structures can be assessed. Laboratory testing is also conducted to determine shearstiffness properties of roof diaphragm assemblies, including the contribution of non-structural roofingmaterial. Test results are used to develop numerical modelling techniques capable of reproducing field testdata for the buildings studied. This project should permit the use of advanced analytical tools for costefficientseismic of low-rise steel buildings.