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WorksheetsSeismic Analysis Overview and Basis
Total questions: 14
Worksheet time: 7mins
In the diagram of seismic analysis procedures, which method is a linear dynamic approach for estimating modal responses?
Time History Analysis with nonlinear hinges
Equivalent Lateral Force method for low-rise
Push-over analysis for performance curves
Response Spectrum Analysis using modal shapes
According to the design basis shown, which set of factors must be considered when determining structural design procedure limitations?
Material unit costs and contractor schedule
Local weather and seasonal temperature
Seismic zoning and site characteristics
Owner preferences and architectural style
Which occupancy category typically has the highest seismic importance factor I for earthquake-resistant design?
Standard Occupancy Structures like offices
Special Occupancy Structures for assembly
Hazardous Facilities like chemical plants
Miscellaneous structures with minor use
Essential Facilities such as hospitals
A facility’s nonstructural components require anchorage for life-safety systems. Which seismic importance factor Ip is most appropriate?
Ip equals 2.0 for essential structures
Ip equals 1.0 for all components
Ip equals 1.25 for anchored parts
Ip equals 1.5 for life-safety anchorage
Ip equals 0.75 for minor elements
A site must be assigned a soil profile type using properly substantiated geotechnical data. Which statement best describes the default classification when soil properties are insufficiently known?
Use Type SE until lab tests are available
Use Type SF for conservative design always
Use Type SD unless SE or SF is confirmed
Use Type SB because rock is assumed by default
Which soil profile type most likely corresponds to shear wave velocity greater than 1500 m/s for the top 30 m?
SA classified as hard rock
SB classified as rock layers
SC classified as very dense soils
SD classified as stiff soil profile
Which provinces are primarily in Seismic Zone 2, affecting the assigned seismic zone factor Z for structures located there?
Palawan, Sulu, Tawi-Tawi provinces
Luzon, Visayas, Mindanao regions
Cordillera, Caraga, Bicol regions
Metro Manila, Cebu, Davao cities
A fault with maximum moment magnitude M between 7.0 and 8.4 would be classified as which seismic source type?
Type C low-activity faults
Type A high-activity faults
Subduction sources only
Type B intermediate faults
A high-rise hospital is 1.8 km from a major fault in Zone 4. What is the recommended design action regarding site response?
Reduce near-source factor due to building importance
Use generic spectrum without modification
Ignore near-source factors beyond 2.0 km
Obtain site-specific elastic design response spectrum
For Seismic Source Type A in Zone 4, which Na value applies at a closest distance less than 2 km?
Na equals 1.2 for Type A, 5 km
Na equals 1.0 for Type C, <2 km
Na equals 1.3 for Type B, <2 km
Na equals 1.5 for Type A, <2 km
Which feature distinguishes a Bearing Wall System from a Building Frame System?
Complete space frame supports gravity loads
Walls or braces carry most gravity loads
Lateral resistance only by moment frames
No lateral resistance is required
In a Dual System, what minimum portion of design base shear must moment-resisting frames resist independently?
More than fifty percent
Twenty percent of base shear
Ten percent of base shear
At least twenty-five percent
Which statement best defines a Cantilevered Column System in structural engineering?
A system with outriggers for overturning moment control
A system using cantilevered column elements for lateral resistance
A system using braced frames for vertical load transfer
A system relying on shear walls for torsional resistance
Which condition permits using the static lateral force procedure for an irregular structure?
Occupancy Category I in Seismic Zone 4
Upper portion period twice the lower portion period
Height not exceeding five stories or 20 m
Average storey stiffness ratio lower to upper less than 1
