Geology Reference
In-Depth Information
Chapter 9
Optimal Seismic Performance-
Based Design of Reinforced
Concrete Buildings
Xiao-Kang Zou
AECOM Asia Company Ltd., Hong Kong
ABSTRACT
In order to meet the emerging trend of the performance-based design approach and to improve the design
efficiency, this chapter presents a numerical optimization technique for both minimum material cost and
life-cycle cost design of building structures subject to multiple levels of linear elastic and nonlinear elastic
seismic drift performance design constraints. This chapter firstly introduces an elastic seismic drift design
of reinforced concrete (RC) building structures based on elastic response spectrum analysis method;
and then presents the inelastic design optimization based on the nonlinear pushover analysis method.
Finally, the optimal seismic performance-based design of RC buildings is posed as a multi-objective
optimization problem in which the life-cycle cost of a building is to be minimised subject to multiple
levels of seismic performance design criteria. The computer based optimization methodology developed
provides a powerful numerical design tool for performance-based design of RC building structures.
1. INTRODUCTION
satisfactory. The acceptability checking proce-
dures may employ various linear or nonlinear
analysis methods to assess the seismic responses
of structures in relation to the acceptable design
criteria. Response spectrum analysis, which is
one of the most common linear elastic methods,
provides designers with a simple but rational
basis for determining the responses of structures
under minor or moderate earthquake loading.
In the advent of advanced computational tech-
niques, nonlinear analysis procedures become
The concept of performance-based design ap-
pears to be the future direction of seismic design
codes (SEAOC 1995; ATC-40 1996; FEMA
356 2000; FEMA 440 2005; FEMA 445 2006;
ASCE41 2007). According to the newly developed
performance-based seismic design approach, an
acceptability analysis needs to be conducted at
various design load levels in order to ensure that
the corresponding performance objectives are
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