Analysis for Shear

Question 1

The analysis for axial load and flexure are
based on the following principles of
mechanics.

Answer 1

Equilibrium
Compatibility
Constitutive

Question 2

Is based on equilibrium of forces by simple equation
The compatibility strain is not considered

Answer 2

conventional analysis

Question 3

The strength of each material corresponds to the_________-

Answer 3

ultimate
strength

Question 4

The strength of concrete under shear although based on
test results, is _________ in nature

Answer 4

empirical

Question 5

Shear stresses generate in beams due to
_______ or ______

Answer 5

bending or twisting

Question 6

2 TYPES OF SHEAR STRESS

Answer 6

➢ Flexural Shear Stress
➢ Torsional Shear Stress

Question 7

The share force & the moment vary
along the _______

Answer 7

length

Question 8

The normal stress & shear stress vary
along the ____ & ______

Answer 8

length & depth

Question 9

The combination of normal & shear
stress generate_____________ field at point

Answer 9

two-dimensional
stress

Question 10

At any point of the beam the state of two-dimensional stresses can be
expressed in term of _________

Answer 10

principal stresses

Question 11

✓ ___________ of stress is helpful to understand the state stress

Answer 11

The Mohr’s circle

Question 12

✓ Before cracking, the stress carried by
steel is ________

Answer 12

negligible

Question 13

For a ____________ (Element 1), the shear stress is
maximum and the normal stress is zero.

Answer 13

point on the neutral axis

Question 14

The principal tensile stress (σ1) is inclined at ______ to the neutral axis.

Answer 14

45º

Question 15

A state of pure shear can be
conceived as a state of __________

Answer 15

biaxial tensile-compressive stresses

Question 16

The _______ is a representation of the state of in-plane stresses on surfaces
of various inclinations passing through a point.

Answer 16

Mohr’s circle

Question 17

The cracks are formed around the neutral axis and perpendicular to the
____________-

Answer 17

principal tensile stress (σ1).

Question 18

For a point near the _________ of the beam (Element 2), the normal
stress is maximum and the shear stress is close to zero.

Answer 18

bottom edge

Question 19

The angle of inclination of σ1 with respect to the axis of the beam (α) is
much smaller than ____.

Answer 19

45°

Question 20

these cracks form at the bottom near the midspan and propagate upward

Answer 20

Flexural cracks

Question 21

these cracks form near the neutral axis close to the support and propagate inclined to the beam axis

Answer 21

Web shear crack

Question 22

these cracks form at the bottom due to flexure and propagate due to both flexure and shear

Answer 22

flexure shear cracks

Question 23

for beams with low span-to-depth ratio or inadequate shear reinforcement, the failure can be due to _______

Answer 23

shear

Question 24

A failure due to ______ is sudden as compared to a failure due to
flexure.

Answer 24

shear

Question 25

an inclined crack propagates rapidly due to inadequate shear reinforcement.

Answer 25

Diagonal tension failure

Question 26

There is crushing of the concrete near the compression flange above the tip of the inclined crack.

Answer 26

Shear compression failure

Question 27

Due to inadequate anchorage of the longitudinal bars, the diagonal cracks propagate horizontally along the bars.

Answer 27

Shear tension failure

Question 28

The concrete in the web crushes due to inadequate web thickness.

Answer 28

Web crushing failure

Question 29

For deep beams, the web may buckle and subsequently crush. There can be anchorage failure or failure of the bearing.

Answer 29

Arch rib failure

Question 30

_______increases in presence of prestressing force.

Answer 30

Vc