This paper presents the nonlinear seismic analysis, development, and implementation of an innovative seismic retrofit strategy for a six-story nonductile reinforced concrete 145,000-sf (13,470 m2) historic building. Dynamic and nonlinear static analytical results verified that the building had a weak soft-story with inadequate post-yield capacity, and large torsional response. The […]
Preliminary analysis of the Shanghai World Financial Center Incorporating Fluid Viscous Dampers
The Shanghai World Financial Center (WFC) is a 106- story building that is scheduled for construction in the near future. The structure, designed by KFP Associates, consists of office buildings, and a 10-story hotel segment located between floors 78 and 87. The structure is designed to be robust in resisting […]
U.S. Design Of Structures With Damping Systems
Many applications of damper devices in both new and existing buildings in both United States and Japan have resulted from extensive damper device development efforts. The increased usage of this technology has created a demand for design guidance and building codes to specify their use in the United States. This […]
Design of an Essential Facility with Steel Moment Frames and Viscous Dampers Using 2000 NEHRP
This new 2-story, 40,000ft2 police headquarters becomes the first building in the United States to apply 2000 NEHRP procedure to design an essential facility with Fluid Viscous Dampers (FVDs). The structure is located in Vacaville, California, which is in a region of high seismic activity and classified as zone 4 […]
Design Of A New Steel Moment Frame Building Incorporating Viscous Dampers Following The Guidelines Of The 1999 SEAOC Blue Book
The project consists of a two-story 150,000 s.f. data storage facility located in Santa Clara, CA. The site for the project, which lies within a region of high seismicity, is located approximately 16 km from the San Andreas and Hayward faults. The building owner desires an enhanced performance state for […]
Performance of Structures with Dampers
The purpose of this paper is to evaluate the earthquake performance of structures with passive energy dissipators. This Paper addresses the following issues: 1) evaluation of seismic intensity levels at which frames incorporating the energy dissipating system (EDS) remain elastic; 2) performance evaluation of frames incorporating an EDS for high […]
Seismic Performance Improvement of A Torsional Irregular Concrete Shear Wall Building Using Toggle-Brace-Dampers
This paper describes a preliminary-assessment case study for seismic performance improvement of a stiffness and strength asymmetric concrete shear wall building using toggle-brace-dampers (TBD). The structure is a 16-story major regional phone switch building located in downtown Seattle. Its bottom 7-story including the basement was constructed in the mid 1950’s. […]
Retrofit Of A Metropolitan Mid-rise To Improve Torsional Response Using Nonlinear Fluid Viscous Dampers
In many metropolitan areas, midrise buildings are constructed adjacent to existing buildings, and incorporate concrete shear walls to act as a barrier between the two buildings. The orientation of these shear walls often causes severe torsional response within the building. The addition of a few well-placed nonlinear Fluid Viscous Dampers […]
Performance-Based Design of a Two-Story Addition to an Existing Nonductile Concrete Structure Enhanced with Passive Energy Dissipators
For full access to this technical paper click here and we will contact you shortly. This paper describes a case study of performance based seismic rehabilitation techniques used for a 1969 vintage concrete parking structure. A new 80,000ft2, two-story addition was planned for this existing 230,000ft2, six-story structure. The evaluation […]
Seismic Retrofit of a Landmark Structure Using a Mass Damper
The landmark Theme Building at the Los Angeles International Airport was evaluated for seismic loading. This structure is comprised of a reinforced concrete annular core and four steel arches placed at 90-degree orientations. Performance based engineering was used to assess the seismic performance of the concrete core. A detailed mathematical […]
