TOPIC 5

Question 1

In which mode does the entire structure moves laterally in the same direction?

Answer 1

MODE

Question 2

What dynamic analysis
describes building storey movements over
time?

Answer 2

HISTORY ANALYSIS

Question 3

What is the dynamic
equilibrium equation?

Answer 3

MU + CU + KU = F(t)

Question 4

To decouple the
equation, we need to multiply ____ in the
equation.

Answer 4

ΦT

Question 5

It is the total
displacement (U1(t)) at any storey is obtained
by summing the responses from all modes.

Answer 5

MODAL SUPERPOSTION

Question 6

The ______ is the
fundamental equation of motion used in
structural dynamics to analyze how structures
respond to external forces like earthquakes.

Answer 6

DYNAMIC EQUILIBRIUM EQUATION

Question 7

This atlas provides detailed maps that illustrate the expected ground motion and shaking intensity across various regions in the Philippines.

Answer 7

SAM PH

Question 8

This occurs when the
rupture moves toward a site, causing a large
velocity pulse at the beginning of the shaking.

Answer 8

FORWARD DIRECTIVITY

Question 9

A special type of
reverse fault where an oceanic plate is pushed
under a continental plate, creating massive
earthquakes

Answer 9

SUBDUCTION ZONE

Question 10

It refers to the
intensification of seismic energy in a specific
direction due to the rupture propagation
along a fault.

Answer 10

DIRECTIVITY

Question 11

five (5) factors to consider when selecting time histories.

Answer 11

1. MAGNITUDE
2. DISTANCE
3. FAULTING MECHANISM
4. SPECTRAL ACCELERATION
5. SOIL/ROCK TYPE
6. DIRECTIVITY