Shih-Ho Chao

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It is well recognized that structures designed by current codes undergo large inelastic deformations during major earthquakes. However, lateral force distributions given in the seismic design codes are typically based on results of elastic-response studies. In this paper, lateral force distributions used in the current seismic codes are reviewed and the(More)
This paper presents a brief overview of performance-based plastic design method as applied to the seismic design of building structures. The method uses pre-selected target drift and yield mechanisms as key performance criteria. The design base shear for a selected hazard level is calculated by equating the work needed to push the structure monotonically up(More)
A performance-based seismic design procedure for steel moment frames based on pre-selected yield mechanism and target drift is proposed in this paper. The design base shear is derived from a modified energy balance equation incorporating the concept of seismic force reduction factor and the displacement amplification factor. A new seismic lateral force(More)
Carbon fiber-reinforced polymer (CFRP) composites have been shown to be particularly well suited for external strengthening of reinforced concretemembers. However, there is limited information about how they can be used to strengthen steel structures that are susceptible to local and global instabilities. This paper discusses test results of full-scale(More)
Self-consolidating high performance fiber reinforced concrete (SCHPFRC) combines the self-consolidating property of self-consolidating concrete (SCC) with the strain-hardening and multiple cracking characteristics of high performance fiber reinforced cement composites (HPFRCC) (Naaman 1987, 1996, 2003). SCHPFRC is a highly flowable, non-segregating concrete(More)
Ultra-high-performance fiber-reinforced concrete (UHP-FRC) has superior material properties with high compressive strength (> 22 ksi [150 MPa]) and shear strength, improved tensile and compressive ductility, and excellent bond and confinement characteristics. All of these features provide an improved and innovative way to design earthquake-resistant moment(More)