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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

    Register Now

     

    If you are not currently logged into ASCE, you will be asked to login or create an ASCE account.

    This course outline is subject to change.

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