REINFORCED CONCRETE DESIGN CODES & SPECIFICATIONS

50問 • 1年前

問題一覧

The maximum moment of a simply supported beam whose span length is L, in meter, carrying a uniformly distributed load of w in N/m is.

wL2 / 8

Loads that are moveable or replaceable on structure are known as.

Live load

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above it.

Soft story

A horizontal or nearly horizontal system acting to transmit lateral forces to the vertical resisting elements. It includes horizontal bracing system.

Diaphragm

These are inert material used in concrete which occupy more than 75% of the volume of the hardened concrete product.

Aggregates

Steel elements such as wire, cables, bars, rods or strands of wires or a bundle of such elements used in pre- stressed concrete structures are called.

Tendons

What method of pre- stressing in which tendons are tensioned before concrete is cast in place.

Pre- tensioning

This refers to the substance other than aggregate, cement or water added in a small quantity normally less than 5% of the weight cement, to alter the properties of the concrete mix or hardened solid.

Admixtures

The minimum bend diameter for 10mm through 25mm bars.

6db

Bars larger than _____ mm shall not be bundles in beams.

36mm

Minimum concrete cover cast against and permanently exposed to earth.

75mm

In ultimate strength design, the strength reduction factor for shear and torsion.

0.85

The minimum one way slab thickness for a BOTH ends continuous slab is.

L/28

Deep simple span flexural members has overall depth to clear span ratio greater than.

0.60

Before commencing the excavation work, the person making the excavation shall notify in writing the owner of the adjoining building not less than ____ days before such excavation is to be made.

10 days

The maximum spacing of ties and spirals in a driven pre- cast concrete pile, center to center.

150 mm

Aviation control towers fall to what type of occupancy?

Essential facilities

The allowable deflection for any structural member loaded with live load only.

L/360

The allowable deflection for any structural member loaded with dead load and live load only.

L/240

Spacing for a lateral support for a beam shall not exceed ____ times the least width b of compression flange or face.

It is an isolated column of masonry or a bearing wall not bonded at the sides into associated masonry, when its horizontal dimension measured the right angles or the thickness does not exceed four times its thickness.

Pier

Method of pre- stressing in which tendons are tensioned after concrete has hardened.

Post-tensioning

A material other than aggregate, cementitious material or water, added in small quantities to the mix in order to produce some (desired) modifications, either to the properties of the mix or of the hardened product.

Admixtures

A simply supported beam , L meters long, carrying a uniformly distributed load of w in N/m, produces a maximum shear force of.

wL/2

Structures that are subjected to transverse load are called.

Beams

Members that are generally vertical, subjected to compressive loads sometimes with bending moments are called.

Columns

These are referred to permanent loads or unmovable loads.

Dead Loads

Loads that change position within the span of a beam in short amount of time. These loads are often exemplified by wheel loads.

Moving loads

It is synonym to bending stress.

Flexural stress

Adherence to materials such as bricks/mortar , or piles of felt, of between felts and other elements of roof systems which use bitumen or other materials as the cementing agent.

Bond

A wall that resists horizontal forces applied in the plane of the wall.

Shear wall

If the ratio of the short direction to the long direction of a slab is less than 0.5 then the slab is.

One- way slab

In ultimate strength design, the reduction factor for bending is.

0.9

The actual strain by which a concrete fail is 0.004. For safety purposes, the ACI code allows designers to use.

0.003

The minimum clear cover allowed by the code for slabs, not exposed to weather is.

20mm

A Number 8(#8 steel reinforcing bar) has a diameter of.

25mm

What do you call those structures that are necessary for emergency operations subsequent to a natural disaster.

Essential facilities

It is one in which the lateral stiffness is less than 70% of the stiffness of the story above or less than 80% of the average stiffness of the three stories above.

Soft story

A Structural system without a complete vertical load- carrying space frame.

Bearing wall system

The minimum reinforcing steel for Spiral Columns allowed by the ACI Code is.

6- 16mm diameter bars

The ACI Code states that “bars larger than #11 should not be bundles in beams or girders”. This means that one should not bundle the steel bars if the diameter is larger than.

36mm

The steel ratio, p for spiral columns ranges from.

0.01- 0.08

The temperature bars are 0- 10mm diameter steel bars placed on top and perpendicular to the main reinforcement of.

One- way slab

Which is the correct factored load for Strength Design Method.

1.4DL + 1.7LL

It is defined as the unit strength of a material.

Stress

The stress developed when the applied load causes adjacent sections within a body to slide past each other.

Shearing Stress

It is the contact pressure developed between two bodies.

Bearing stress

The stress induced as a result od restrained deformations due to changes in temperature.

Thermal stress

The actual stress in a material under a given loading.

Working stress

It is the maximum safe stress that a material can withstand.

Allowable stress

BU2 Quiz 100

Mat · 30問 · 1年前

BU2 Quiz 100