Vocabulary For Test 2 Structures Two

Front 1

An interior surface of a beam where bending strains and stresses are zero

Back 1

Neutral Surface

Front 2

Webs resist approximately 90% of the total _______for structural rolled shapes

Back 2

Shear

Front 3

flanges resist 90% of the total __________ for structural rolled shapes

Back 3

Bending Forces

Front 4

The three main failure modes for a beam are

Back 4

bending, shear and deflection

Front 5

a stiffness requirement, tepresents a change in the vertical positon of a beam due to the applied loads

Back 5

Deflection

Front 6

is a measure of bending resistance which includes both I and C

Back 6

Section Modulus

Front 7

In the general shear formula, Q is the _______________and its units are in in^3

Back 7

First Moment

Front 8

the four factors that affect the amount of deflection in a beam are

Back 8

moment of inertia, load, span, and modulusfo elasticity

Front 9

the two types of shearing stresses, _____________ shear and _____________ shear stress, are equal in magnitude

Back 9

transitive and longitudinal

Front 10

the ______________ along the depth of a rectangular beam in parabolic. The maximum value occurs at the _____________.

Back 10

Shear stress diagram, Neutral Axis

Front 11

is linear, for a downward loaded beam, varying froma a maximum compression at the top to the maximum tension at the bottom.

Back 11

Bending sress distrobution

Front 12

over reinforced beams have a suctile failure which is why the cose specifies a maximum amount of tensile steel reinforcement

Back 12

false

Front 13

are essentially vertical members responsible for supporting compressive loads from roof and floors, transmiting the vertical forces to the foundations and onto subsoil.

Back 13

columns

Front 14

short couluns fail by __________ and long columns fail by ____________.

Back 14

Crushing, Buckleing

Front 15

repersents the relationship between the load that causes buckling of pinned end column and the stiffness properties of the column.

Back 15

Eulers Equation

Front 16

is a shape factor that measures a columns resistance to buckling about it's axis

Back 16

Radius of Gyration

Front 17

In steel columns a factor ____ is used as a multiplier for converting the actual length to an __________ buckling length based of end conditons.

Back 17

K, effective

Front 18

structural steel columns are limited to a slenderness ration equal to _______.

Back 18

200

Front 19

wodd columns are resticted to a maximum slenderness ration of ______

Back 19

50

Front 20

the longitudinal reinforcing in a tied coumn is held in place by stirrups, commonly a No. 3 or a No. 4 bar.

Back 20

false