Conference Proceedings

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Evaluation of Current Nonlinear Static Procedures for Concrete Buildings Using Recorded Strong-Motion Data (with Charles Chadwell), SMIP07 Seminar on Utilization of Strong-Motion Data (2007)

This paper evaluates current Nonlinear Static Procedures (NSPs) specified in the FEMA- 356, ASCE-41, ATC-40,...

 

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Evaluation of Nonlinear Static Procedures Using Strong-Motion Building Records, Proceedings of SMIP04 Seminar on Utilization of Strong-Motion Data (2004)

The objective of this investigation is to evaluate the FEMA-356 Nonlinear Static Procedure (NSP), the...

 

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Evaluation of Modal Pushover Analysis: SAC Buildings Excluding Gravity Loads (with Anil K. Chopra), Proceedings of the 2002 Structures Congress (2002)
 

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Improved Direct Displacement-Based Design Procedure for Performance-Based Seismic Design of Structures (with Anil K. Chopra), Proceedings of Structures 2001: A Structural Engineering Odyssey (2001)

Direct displacement-based design requires a simplified procedure to estimate the seismic deformation of an inelastic...

 

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Direct Displacement-Based Design Using Inelastic Design Spectrum (with Anil K. Chopra), 2nd US-Japan Workshop on Perforamance-Based Engineering for Reinforced Concrete Building Structures: Sapporo, Hokkaido, Japan (2000)
 

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Application of Inelastic Design Spectrum to Capacity-Demand Diagram Methods (with Anil K. Chopra), Proceedings of Structures Congress 2000: Advanced Technology in Structural Engineering (2000)

An improved capacity-demand-diagram method that uses the well-known constant-ductility design spectrum for the demand diagram...

 

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Control of Earthquake Induced Vibrations in Asymmetric Buildings Using Passive Damping, Proceedings of Structures Congress 2000: Advanced Technology in Structural Engineering (2000)

This paper summarizes the results of a recent investigation on the dynamic response of asymmetric-plan...

 

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Seismic Control of Asymmetric Structures, Proceedings of the 1999 Structures Congress: Structural Engineering in the 21st Century (1999)
 

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Seismic Code Improvements Based on Recorded Motions of Buildings During Earthquake (with Anil K. Chopra and Juan Carlos De la Llera), SMIP98 Seminar on Utilization of Strong-Motion Data (1998)

Summarized in this paper are the results of two recent investigations utilizing recorded motions of...

 

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Seismic Code Improvements Based on Recorded Motions of Buildings During Earthquake (with Anil K. Chopra and Juan Carlos De la Llera), SMIP98 Seminar on Utilization of Strong-Motion Data (1998)

Summarized in this paper are the results of two recent investigations utilizing recorded motions of...

 

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Energy Based Approach to Earthquake Response of Asymmetric Systems, Proceedings of Structures Congres XV: Building to Last (1997)
 

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Evaluation of Code Period Formula for Concrete MRF Buildings (with Anil K. Chopra), Proceedings of Structures Congress XV: Building to Last (1997)

The empirical formula specified in US building codes for fundamental vibration period of concrete moment...

 

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Capacity and Stiffness of Bridge Abutments During Earthquakes, Proceeedings of Natural Disaster Reduction: Washington, D.C. (1996)
 

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Seismic Response Study of the US 101/Painter Street Overpass Using Strong Motion Records (with Anil K. Chopra), SMIP94 Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data (1994)

Abutment stiffnesses are determined directly from the earthquake motions recorded at the US 101/Painter Street...

 

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Seismic Response Study of the US 101/Painter Street Overpass Using Strong Motion Records (with Anil K. Chopra), SMIP94 Seminar on Seismological and Engineering Implications of Recent Strong-Motion Data (1994)

Abutment stiffnesses are determined directly from the earthquake motions recorded at the US 101/Painter Street...

 

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Evaluation of US Seismic Code Provisions for Asymmetric-Plan Systems (with Anil K. Chopra), Proceedings of Structures Congress 1993: Structural Engineering in Natural Hazards Mitigation (1993)

The effects of plan asymmetry on the earthquake response of code-designed, one-story systems are identified...

 

Reports

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Base Shear Estimated from Floor Accelerations and Column Shears, Structural Engineering and Applied Mechanics, Report No: CP/SEAM-2010/01 (2010)

This paper compares base shear computed from floor accelerations (inertial base shear) and column shears...

 

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Seismic Analysis of Buildings to Recorded Motions, Data Utilization Report California Strong Motion Instrumentation Program, Report No. CP/SEAM-09/01 (2009)

This investigation focused on developing an improved understanding of challenges associated with computation of nonlinear...

 

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EVALUATION OF CURRENT NONLINEAR STATIC PROCEDURES FOR CONCRETE BUILDINGS USING RECORDED STRONG-MOTION DATA (with Charles Chadwell), Data Utilization Report California Strong Motion Instrumentation Program (2007)

This study evaluates current Nonlinear Static Procedures (NSPs) specified in the FEMA356, ASCE-41, ATC-40, and...

 

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Preliminary Report On September 28, 2004 Parkfield Earthquake (with Charles Chadwell), Earthquake Engineering Research Institute (2004)

A strong earthquake of magnitude 6.0 (Mw) struck the Central Coast of California at 10:15:24...

 

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Preliminary Report on December 22, 2003 San Simeon Earthquake, Earthquake Engineering Research Institute (2003)

A strong earthquake of magnitude 6.5 ( Mw) struck the Central Coast of California at...

 

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EVALUATION OF NONLINEAR STATIC PROCEDURES USING STRONG-MOTION RECORDS OF BUILDINGS, Data Utilization Report California Strong Motion Instrumentation Program (2003)

The objective of this investigation is to evaluate the FEMA-356 Nonlinear Static Procedure (NSP) and...

 

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A Modal Pushover Analysis Procedure to Estimate Seismic Demands for Unsymmetric-Plan Buildings: Theory and Preliminary Evaluation (with Anil K. Chopra), Earthquake Engineering Research Center (2003)

Based on structural dynamics theory, the modal pushover analysis procedure (MPA) retains the conceptual simplicity...

 

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A Modal Pushover Analysis Procedure to Estimate Seismic Demands for Unsymmetric-Plan Buildings: Theory and Preliminary Evaluation (with Anil K. Chopra), Earthquake Engineering Research Center (2003)

Based on structural dynamics theory, the modal pushover analysis procedure (MPA) retains the conceptual simplicity...

 

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Seismic Response Study of Asymmetric Systems with Linear and Nonlinear Fluid Viscous Dampers, Report No. CP/SEAM-2002/06: Structural Engineering and Applied Mechanics (2002)

This investigation is concerned with application of nonlinear fluid viscous dampers for asymmetric-plan systems. For...

 

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Dynamic Properties of Fire Sprinkler Systems (with James S. Dillingham) (2002)

Four fire protection systems have been attached to a small building model for testing their...

 

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Influence of Inclined Viscous Damper on Column Axial Force, Structural Engineering and Applied Mechanics (2002)

This investigation examined the influence of inclined viscous damper on column axial force in a...

 

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Statistics of SDF-System Estimate of Roof Displacement for Pushover Analysis of Buildings (with Anil K. Chopra and Chatpan Chintanapakdee), Pacific Earthquake Engineering Research Center (2001)

Investigated in this report is the basic premise that the roof displacement of a multistory...

 

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A Modal Pushover Analysis Procedure to Estimate Seismic Demands for Buildings: Theory and Preliminary Evaluation (with Anil K. Chopra), PEER 2001/03 (2001)

The principal objective of this investigation is to develop a pushover analysis procedure based on...

 

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Effects of Supplemental Viscous Damping on Inelastic Seismic Response of Assymetric Systems (with Cecilia A. Booker), Report No. CP/SEAM-2000/02: Structural Engineering and Applied Mechanics (2000)

This study investigates the effects of supplemental viscous damping on the seismic response of one-story,...

 

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Supplemental Viscous Damping Effects on Seismic Demands of Linear Elastic Systems (with Linda M. Tam), Report No. CP/SEAM-2000/01: Structural Engineering and Applied Mechanics (2000)

The objective of this study is to examine the effects of viscous supplemental damping on...

 

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Capacity-Demand-Diagram Methods for Estimating Seismic Deformation of Inelastic Structures: SDF Systems (with Anil K. Chopra), Report No. PEER1999/02 (1999)

The ATC-40 and FEMA-274 documents contain simplified nonlinear analysis procedures to determine the displacement demand...

 

Articles

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Simplified Procedures for Seismic Analysis and Design of Piers and Wharves in Marine Oil and LNG Terminals, Civil and Environmental Engineering (2010)
 

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Simplified Procedure for Seismic Evaluation of Piles with Partial-Moment Connection to the Deck in Marine Oil Terminals, Journal of Structural Engineering (2010)

This paper presents development of a simplified procedure for seismic evaluation of piles with partial-moment...

 

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Linear Analysis of Ordinary Bridges Crossing Fault-Rupture Zones (with Anil K. Chopra), Journal of Bridge Engineering (2009)

Rooted in structural dynamics theory, two approximate procedures for estimating peak responses of linearly elastic...

 

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Nonlinear Analysis of Ordinary Bridges Crossing Fault-Rupture Zones (with Anil K. Chopra), Journal of Bridge Engineering (2009)

Rooted in structural dynamics theory, three approximate procedures for estimating seismic demands for bridges crossing...

 

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Role of Shear Keys in Seismic Behavior of Bridges Crossing Fault-Rupture Zones (with Anil K. Chopra), Journal of Bridge Engineering (2008)

This paper examines the role of shear keys at bridge abutments in the seismic behavior...

 

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Role of Higher-"Mode" Pushover Analyses in Seismic Analysis of Buildings (with Anil K. Chopra), Earthquake Spectra (2005)

The role of higher-“mode” pushover analyses in seismic analysis of buildings is examined in this...

 

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Evaluation of Modal and FEMA Pushover Procedures Using Strong-Motion Records of Buildings, Earthquake Spectra (2005)

The objective of this investigation is to evaluate the FEMA-356 Nonlinear Static Procedure (NSP) and...

 

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Extension of Modal Pushover Analysis to Compute Member Forces (with Anil K. Chopra), Earthquake Spectra (2005)

This paper extends the modal pushover analysis (MPA) procedure for estimating seismic deformation demands for...

 

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Response to B. Maison's Discussion of "Evaluation of Modal and FEMA Pushover Analyses: SAC Buildings" (with Anil K. Chopra), Earthquake Spectra (2005)
 

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Evaluation of a Modified MPA Procedure Assuming Higher Modes as Elastic to Estimate Seismic Demands (with Anil K. Chopra and Chatpan Chintanapakdee), Earthquake Spectra (2004)

The modal pushover analysis (MPA) procedure, which includes the contributions of all significant modes of...

 

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Evaluation of Modal and FEMA Pushover Analyses: SAC Buildings (with Anil K. Chopra), Earthquake Spectra (2004)

This paper comprehensively evaluates the Modal Pushover Analysis (MPA) procedure against the ‘‘exact’’ nonlinear response...

 

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Statistics of Single-Degree-of-Freedom Estimate of Displacement for Pushover Analysis of Buildings (with Anil K. Chopra and Chatpan Chintanapakdee), Journal of Structural Engineering (2003)

Investigated is the basic premise that the roof displacement of a multistory building can be...

 

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Evaluation of NSP to Estimate Seismic Deformation: SDF Systems (with Anil K. Chopra), Journal of Structural Engineering (2000)

Investigated in this paper is the approximation in the ATC-40 nonlinear static procedure (NSP) that...

 

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Closure to Period Formulas for Concrete Shear Wall Buildings (with Anil K. Chopra), Journal of Structural Engineering (1999)
 

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Period Formulas for Concrete Shear Wall Buildings (with Anil K. Chopra), Journal of Structural Engineering (1998)

Most seismic codes specify empirical formulas to estimate the fundamental vibration period of buildings. Evaluated...

 

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Earthquake Characteristics of Bridges with Integral Abutments, Journal of Structural Engineering (1997)

Earthquake analysis of bridges requires that the period and damping ratio be determined for each...

 

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Period Formulas for Moment-Resisting Frame Buildings (with Anil K. Chopra), Journal of Structural Engineering (1997)

Most seismic codes specify empirical formulas to estimate the fundamental vibration period of buildings. Evaluated...

 

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Seismic Response of Asymmetric Systems: Energy-Based Approach, Journal of Structural Engineering (1997)

An energy-based approach has been used to investigate the seismic behavior of code-designed asymmetric-plan systems....

 

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Closure to "Seismic Code Analysis of Buildings Without Locating Centers of Rigidity" (with Anil K. Chopra), Journal of Structural Engineering (1995)
 

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Dual-Level Approach for Seismic Design of Asymmetric-Plan Buildings (with Anil K. Chopra), Journal of Structural Engineering (1994)

Buildings should be designed to resist moderate ground motion without structural damage and resist intense...

 

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Seismic Code Analysis of Buildings Without Locating Centers of Rigidity (with Anil K. Chopra), Journal of Structural Engineering (1993)

Static force procedures of most building codes require that the lateral earthquake force at each...

 

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Evaluation of Torsional Provisions in Seismic Codes (with Anil K. Chopra), Journal of Structural Engineering (1991)

The effects of plan asymmetry on the earthquake response of code-designed, one-story systems are identified...

 

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Effects of Plan Asymmetry in Inelastic Seismic Response of One-Story Systems (with Anil K. Chopra), Journal of Structural Engineering (1991)

The effects of plan asymmetry on the earthquake response of one-story systems are identified by...

 

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Statistics of SDF-System Estimate of Roof Displacement for Pushover Analysis of Buildings (with Anil K. Chopra and Chatpan Chintanapakdee), Pacific Earthquake Engineering Research Center (2001)

Investigated in this report is the basic premise that the roof displacement of a multistory...