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# Seismic Analysis of Building Structures Content Outline

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Week 1: Introduction and Basic Structural Dynamics

Learning Outcomes:

• List and summarize the four seismic analysis methods in ASCE 7
• Identify the important characteristics of structures related to dynamic analysis.
• Describe the basic process for solving structural dynamics problems.

Topics:

• Seismic Analysis Methods in ASCE 7
• Single Degree of Freedom Structural Dynamics
• Multi Degree of Freedom Structural Dynamics

Week 2: Structural Dynamics and ASCE 7 Analysis Methods

Learning Outcomes:

• Differentiate between a response history plot from an individual dynamic analysis of a structure and a response spectrum used for determining structural response.
• Employ a response spectrum to determine a maximum response given the system characteristics.
• Identify and explain the inherent assumptions and the manner to consider inelastic response in the four seismic analysis methods.

Topics:

• Response History versus Response Spectrum
• Seismic Analysis Methods, their limitations and process
• Additional topics in Structural Dynamics

Week 3: Modeling Considerations Part 1

Learning Outcomes:

• Construct a computational model including the required structural elements for a seismic load analysis.
• Implement the modeling procedures for rigid and semirigid diaphragm behavior in a 3-D structural analysis model.
• Discuss the issues related to including or excluding nonstructural components in the mathematical model.
• Calculate and apply the correct seismic mass to a structural analysis model.

Topics:

• Modeling Structural Elements for Seismic Load Analysis
• Modeling Diaphragms in 3-D Seismic Analysis Models
• Including Seismic Mass in Analysis Models

Week 4: Modeling Considerations Part 2

Learning Outcomes:

• Correctly apply lateral forces to structures with rigid and semirigid diaphragms.
• Assess the importance of P-Delta effects by including such effects directly in the analysis.
• Qualitatively assess a structure to determine when vertical accelerations would be required for seismic design.
• Correctly implement inherent damping in a computational model for linear response history analysis.

Topics:

• Including seismic forces and P-Delta effects in a seismic model
• Inherent damping in structures
• Vertical effects
• Overview of Seismic Isolation and Supplemental Damping

Week 5: Seismic Loading

Learning Outcomes:

• Describe the impact of site conditions and site distance on seismic response of structures.
• Specify the criteria for selecting ground motion recordings for use in a response history analysis.
• Modify ground motion recordings using either amplitude scaling or spectrum matching based on the design response spectrum or a site-specific response spectrum.

Topics:

• Seismic Loading of Structures
• Response Spectrum
• Ground Motion Record Selection and Modification

Week 6: Overview of ASCE 7-16 Analysis Requirements

Learning Outcomes:

• Correctly select the appropriate analysis procedure.
• Implement the load combinations with seismic effects including the effects of orthogonal combination into an analysis model.
• Evaluate a structure to determine whether the redundancy factor, ρ , is 1.0 or 1.3.

Topics:

• Load Combinations with Seismic Effects
• Selection of Analysis Procedure
• Effective Seismic Weight and Structural Modeling

Week 7: Unified Linear Dynamic Analysis Part 1

Learning Outcomes:

• List the procedural steps for Modal Response Spectrum and Linear Response History Analysis.
• Identify and describe the similarities between MRS and LRH analysis, and how these can be used to formulate a “Unified” approach.
• Select the correct number of modes based on the effective modal mass in a dynamic analysis to capture the response.

Topics:

• Unified Linear Dynamic Analysis
• Modal Response Spectrum and Linear Response History Analysis Overview
• Similarities and Differences between MRS and LRH

Week 8: Unified Linear Dynamic Analysis Part 2

Learning Outcomes:

• Identify and describe the similarities between MRS and LRH analysis, and how these can be used to formulate a “Unified” approach.
• Select and modify ground motions for use in the Linear Response History Analysis method.
• Scale and combine results from orthogonal directions in the MRS and LRH.

Topics:

• Addressing Differences between MRS and LRH
• Ground Motion Selection and Modification
• Inherent Damping
• Scaling and Combining Orthogonal Direction Results

Week 9: Development of Detailed Mathematical Model

Learning Outcomes:

• Calculate the base shear and story forces using the Equivalent Lateral Force Method.
• Build and analyze a computational model in accordance with the Equivalent Lateral Force Method to determine force and drift demands under seismic loads.
• List and define the conformance checks required of all the analysis methods.

Topics:

• Detailed Example Structure Description
• Implementation of the Equivalent Lateral Force method for Case Study
• Conformance Checks required for all Analysis Methods

Week 10: Modal Response Spectrum

Learning Outcomes:

• Select the number of modes required by ASCE 7 to adequately capture total response using Modal Response Spectrum Analysis.
• Build an analysis model consistent with ASCE 7 requirement for Modal Response Spectrum Analysis.
• Calculate the seismic demands for a structure using the Modal Response Spectrum Analysis Method.

Topics:

• Design Spectrum and Modal Properties
• Determining Modal Responses
• Combining Modal Responses
• Scaling Total Response to ELF Base Shear

Week 11: Linear Response History

Learning Outcomes:

• Select and modify ground motions for linear response history analysis using appropriate tools based on the design response spectrum.
• Build a structural analysis model consistent with the requirements for Linear Response History Analysis.
• Calculate the seismic force and deformation demands on a structure using the Linear Response History Analysis method.

Topics:

• Selection and Modification of Ground Motion Records
• Analysis and Modeling Details for Linear Response History
• Results of LRH Analysis

Week 12: Analysis Results Comparison and Floor Response Spectra

Learning Outcomes:

• Identify the differences in results computed using the Equivalent Lateral Force, Modal Response Spectrum, and Linear Response History Analysis methods.
• Describe the process for determining floor response spectra that can be used for design of nonstructural components and systems.
• Calculate seismic forces on nonstructural elements using Floor Spectra.

Topics:

• Comparison of Analysis Method Results
• Developing Floor Response Spectra
• Calculating seismic forces for Nonstructural Components using Floor Spectra

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This course outline is subject to change