Performance-based design using structural optimization

Abstract

A new methodology for seismic design is proposed based on structural optimization with performance-based constraints. Performance-based criteria are introduced for the seismic design of new buildings. These criteria are derived from the National Guidelines for Seismic Rehabilitation of Buildings (Reference [19], Federal Emergency Management Agency (FEMA), 'NHERP Guidelines for seismic rehabilitation of buildings', Report Nos 273 and 274, Washington, DC, 1997) for retroÿtting existing structures. The proposed design methodology takes into account the non-linear behaviour of the structure. The goal is to incorporate in the design the actual performance levels of the structure, i.e. how much reserve capacity the structure has in an earthquake of a given magnitude. The optimal design of the structure minimizes the structural cost subjected to performance constraints on plastic rotations of beams and columns, as well as behavioural constraints for reinforced concrete frames. Uncertainties in the structural period and in the earthquake excitation are taken into account using convex models. The optimization routine incorporates a non-linear analysis program and the procedure is automated. The proposed methodology leads to a structural design for which the levels of reliability (performance levels) are assumed to be quantiÿable. Furthermore, the entire behaviour of the structure well into the non-linear range is investigated in the design process.

Contribution to sustainable seismic design of reinforced concrete members through embodied CO2 emissions optimization

“…Early efforts to optimise earthquake resistant structures were based on traditional seismic design approaches. More recent studies investigate optimum performance-based seismic design (PBSD) methodologies that provide better control of structural damage [11][12][13][14]. The author [15] developed optimum seismic designs of RC frames according to traditional [16] and PBSD methodologies [17].…”

Optimum Design of Reinforced Concrete Frames According to Ec8 and Mc2010 With Genetic Algorithms

“…Ganzerli et al (2000) were the first, to the best of the author's knowledge, to consider seismic optimization with performance-based constraints. Chan and Zou (2004) examined optimum seismic design of reinforced concrete frames by employing optimality criteria approach.…”

Modified-modal-pushover-based seismic optimum design for steel structures considering life-cycle cost

“…Although the significant higher mode effects, theoretical foundation, and computational aspect need to be investigated and improved further, the above mentioned pushover analysis procedures have the advantages of high computational efficiency, acceptable accuracy and easy operation. In addition, it is noted that more and more literatures (Ganzerli et al 2000;Liu et al 2003Liu et al , 2005Zou and Chan 2005;Fragiadaki et al 2006;Zou et al 2007) on building structural optimization have made use of the pushover analysis methods. Nevertheless, there is still no works on the inelastic structural optimization considering the higher modes effects, which are very significant for the medium-to high-rise buildings.…”