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Seismic Loads Course Outline

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      Week 01: Introduction and Seismic Risk

      Learning Outcomes:

      • Summarize the history of the development of seismic design provisions in the U.S.
      • Accurately define the difference between seismic risk and seismic hazard.
      • Correctly identify the seismic risk associated with a given project location.

      Topics:

      • Course and Instructor Introduction
      • Course Objectives/Outcomes
      • Course Content
      • Seismic Building Codes in the U.S.
      • Seismic Risk Analysis
      • Weekly Summary

      Week 02: Influence of Soil Stiffness on Ground Motions

      Learning Outcomes:

      • Correctly define the different spectral parameters used to define the seismic hazard in ASCE 7.
      • Determine the site classification given the geotechnical parameters.
      • Accurately summarize the impact site classification has on the seismic hazard response spectrum.

      Topics:

      • Quantification of Ground Motions
      • ASCE 7 Ground Motion Parameters
      • Influence of Soil Stiffness on Site Response
      • Site Class Determination
      • Determination of Site Class Coefficients Fa, Fv, and Cv
      • Influence of Site Class on Spectral Shape

      Week 03: Ground Motion Parameters, Seismic Design Category, and Response Spectra

      Learning Outcomes:

      • Determine the spectral accelerations for a given site using ASCE 7 or the online tools.
      • Compute the site coefficients used to modify spectral accelerations to account for the site class.
      • Establish the Seismic Design Category using the Design Spectral Accelerations.
      • Develop the Design Response Spectrum for a given project site using ASCE 7 or the online tool.

      Topics:

      • Determination of spectral accelerations and site coefficients
      • Determination of the Seismic Design Category
      • Development of the Design Response Spectrum

      Week 04: Structural Systems and Combinations of Systems

      Learning Outcomes:

      • Define the three seismic performance factors assigned to lateral resisting systems.
      • Determine the acceptability of a given lateral system based on the seismic design category and structure height.
      • List and describe the different types of steel and reinforced concrete lateral resisting systems.
      • Summarize the advantages and disadvantages of different lateral resisting systems.

      Topics:

      • Seismic performance factors
      • Bearing wall, building frames and moment frames
      • Structural steel lateral resisting systems
      • Reinforced concrete lateral resisting systems
      • Combination lateral resisting systems

      Week 05: Horizontal and Vertical Structural Irregularities

      Learning Outcomes:

      • List and define the horizontal and vertical irregularities in ASCE 7.
      • List the penalties which affect seismic analysis and design of structures with structural irregularities in ASCE 7.
      • Correctly determine the presence of horizontal and vertical irregularities in a structure in accordance with ASCE 7.

      Topics:

      • Impact of irregularities on seismic response
      • Analysis and design penalties associated with irregularities
      • Horizontal structural irregularities
      • Vertical Structural Irregularities

      Week 06: Diaphragm Flexibility, Accidental Torsion, and Analysis Requirements

      Learning Outcomes:

      • Define the three different diaphragm idealizations used in ASCE 7.
      • List and describe the four analysis methods specified in ASCE 7.
      • Specify which analysis method can be used to determine seismic demands for a given project.
      • Calculate accidental torsion and determine when it needs to be applied in seismic design.

      Topics:

      • Idealization of diaphragm behavior in ASCE 7
      • Selection of structural analysis procedure for seismic load determination
      • Inherent and accidental torsion
      • Requirements for including torsion in seismic analysis

      Week 07: Load Combinations, Redundancy & Overstrength, Effective Seismic Weight

      Learning Outcomes:

      • Correctly calculate and apply the redundancy factors in load combinations with seismic forces.
      • Determine the elements that must be designed using the load combinations including the overstrength factor.
      • Accurately calculate the seismic weight of a building structure for determination of the seismic base shear.

      Topics:

      • Load combinations with seismic load effects
      • Calculating and using the redundancy factor
      • Overstrength factors and where they apply to structural design
      • Orthogonal load effects
      • Calculating the effective seismic weight

      Week 08: Modeling Requirements, Period of Vibration, and Drift

      Learning Outcomes:

      • List the requirements of the computational model used to analyze the structure for seismic forces.
      • Calculate the approximate fundamental period that can be used to determine the seismic forces.
      • Compute amplified story drifts and verify they are less than ASCE 7 prescribed drift limits.

      Topics:

      • Requirements of the computational model for determining seismic force demands
      • Methods to approximate the period of vibration of the structure
      • Calculating the period of vibration using an analytical model
      • Determining elastic story drifts from an analysis model
      • Calculating amplified story drifts
      • Checking amplified story drifts against ASCE 7 prescribed limits

      Week 09: Equivalent Lateral Force and Modal Response Spectrum Analysis

      Learning Outcomes:

      • Select which of the four analysis methods is allowable for a given structure in accordance with ASCE 7.
      • Correctly compute the seismic force demands in accordance with the Equivalent Lateral Force Method.
      • Accurately calculate the seismic force demands in accordance with the Modal Response Spectrum Analysis Method.

      Topics:

      • Selection of appropriate analysis methods in ASCE 7
      • Basis for the Equivalent Lateral Force Method
      • Application of the Equivalent Lateral Force Method
      • Basis for Modal Response Spectrum Analysis Method
      • Application of the Modal Response Spectrum Method

      Week 10: Linear and Nonlinear Response History Analysis

      Learning Outcomes:

      • Discuss the differences between response spectrum and response history analysis in determining seismic forces.
      • Apply the Linear Response History Analysis method to compute seismic force demands in structures in accordance with ASCE 7.
      • List the steps in the Nonlinear Response History Analysis method.

      Topics:

      • Basis for Response History Analysis
      • Selection of Ground Motions for Response History Analysis
      • Basis for Linear Response History
      • Application of the Linear Response History Method
      • Basis for Nonlinear Response History
      • When to use Nonlinear Response History Analysis
      • Summary of steps for Nonlinear Response History Analysis

      Week 11: Analysis Comparisons and Diaphragm Forces

      Learning Outcomes:

      • Discuss the differences between the Equivalent Lateral Force, Modal Response Spectrum and Linear Response History Analysis Methods for determining seismic design demands.
      • Accurately calculate diaphragm forces for all levels of a building using the provisions of ASCE 7.
      • Compute the design forces in the diaphragm, chords, and collectors using the equations in ASCE 7.

      Topics:

      • Comparison of ELF, MRSA, and LRH
      • Elements of structural diaphragms
      • Calculation of diaphragm forces
      • Load path from diaphragm to lateral resisting system

      Week 12: Nonstructural Components and Nonbuilding Structures

      Learning Outcomes:

      • Summarize the analysis and design process used for seismic design of nonbuilding structures.
      • Determine when seismic design of nonstructural components and systems is required.
      • Compute the seismic forces used to design the anchorage for non-structural components and systems.

      Topics:

      • Different types of nonbuilding structures
      • Seismic design nonbuilding structures
      • Types of nonstructural components
      • Seismic design of nonstructural components

      Registration opens soon!

      This course outline is subject to change.

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