Studies on Seismic Demand Spectra Based on Strength Reduction Factor
For resolving the practical problem about bridge structures, according to the seismic damage regularity and the structural characteristics, the capacity design method of bridge structure was introduced. In order to account synthetically for the influence factors and convert the inelastic seismic design method into the pseudo-static method, which is easily accepted by engineers, the strength reduction factor was commonly used in seismic design of structures. Based on the principles of the inelastic spectrum established by using the relationship between the strength reduction factor R and ductility factor μ, the seismic demand spectra were obtained from the design spectrum of the Highway Engineering Seismic Design Code (JTJ 004-89). This will be beneficial to the earthquake-resistant capacity design in practical bridge structures.
Chaohe Chen, Yong Huang and Guangfan Li
X. L. Zhu et al., "Studies on Seismic Demand Spectra Based on Strength Reduction Factor", Advanced Materials Research, Vols. 243-249, pp. 4047-4051, 2011