Peer-Reviewed Journal Details
Mandatory Fields
Salawdeh, S,Goggins, J
Earthquakes And Structures
Direct displacement based seismic design for single storey steel concentrically braced frames
WOS: 5 ()
Optional Fields
concentrically braced frames displacement based design shake table tests nonlinear time history analysis seismic design equivalent viscous damping BRACING MEMBERS BEHAVIOR BUILDINGS SYSTEMS EARTHQUAKE
The direct displacement based design (DDBD) approach is spreading in the field of seismic design for many types of structures. This paper is carried out to present a robust approach for the DDBD procedure for single degree of freedom (SDOF) concentrically braced frames (CBFs). Special attention is paid to the choice of an equivalent viscous damping (EVD) model that represents the behaviour of a series of full scale shake table tests. The performance of the DDBD methodology of the CBFs is verified by two ways. Firstly, by comparing the DDBD results with a series of full-scale shake table tests. Secondly, by comparing the DDBD results with a quantified nonlinear time history analysis (NLTHA). It is found that the DDBD works relatively well and could predict the base shear forces (F-b) and the required brace cross sectional sizes of the actual values obtained from shake table tests and NLTHA. In other words, when comparing the ratio of Fb estimated from the DDBD to the measured values in shake table tests, the mean and coefficient of variation (CV) are found to be 1.09 and 0.12, respectively. Moreover, the mean and CV of the ratios of Fb estimated from the DDBD to the values obtained from NLTHA are found to be 1.03 and 0.12, respectively. Thus, the DDBD methodology presented in this paper has been shown to give accurate and reliable results.
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