pak kamta 1

8/7/2019 Pak Kamta 1

1/11

Dr. Eng. Sukamta


2/11

General Introduction for Reinforced Concrete Structure,

Design Method and Requirements,

Analyze and Design of Section for Bending Load,Analyze and Design of Section for Shear and torsion,

Analyze and Design of Section for Uniaxial Bending and axial Load,

Design of anchored steel,

Design of slab,

Design of Foundation,

Analyze and Design of Section for Biaxial Bending and axial Load,

Capacity Design,

Analyze and Design of Beam - Column Joint

Nilai :

Tugas : 10 %

U T S : 40 %

U A S : 50 %


3/11

is a mixture of Portland cement, water, aggregates, and in

some cases, admixtures.

The cement and water form a paste that hardens and

bonds the aggregates together.

Concrete is often looked upon as man made rock.

Concrete is a versatile construction material, adaptable to

a wide variety of agricultural and residential uses.

Concrete hasstrength, durability, versatility, and economy.

It can be placed or molded into virtually any shape and

reproduce any surface texture.

Concrete


4/11

Concrete Ingredients

Quality of concrete depends on quality of paste

and quality of aggregates

each particle of aggregate is completely coated

with paste

All spaces between aggregate is filled with paste


5/11

Compressive Strength of Concrete

fcr is the average cylinderstrength

fc compressive strength for design

fc

~2500 psi - 18,000 psi, typically 3000 - 6000

psi

Ec estimated as:

where w = weight of concrete, lb/ft3

fc in psi

E in psi

for normal weight concrete ~145 lb/ft3

E w fc c! 331 5.

'

E fc c! 57 000,


6/11

Concrete Stress-Strain Curve

For short term loading. Over time concrete will creep and shrink.

The image cannot be displayed. Your computer may not have enough memory to open the image, or the image may have been corrupted. Restart your computer, and then open the file again. If the red x still appears, you may have to delete the image and then insert it again.


7/11

Concrete Strain

Strain in concrete will be caused by loading,creep, shrinkage, and temperature change.

For scale, consider a 20 section of concrete,

fc = 4000 psi, under a stress, fc = 1800 psi.Determine the change in length.


8/11

Tensile Strength of Concrete

Tensile strength of concrete is about

~300 600 psi

Tensile strength of concrete isignored in design

Steel reinforcement is placed where tensile

stresses occur

Where do tensile stresses occur?

f c'

10


9/11

Tensile Stresses

Restrained shrinkage

slab on grade

shrinkage strain, = 0.0006

= E = 0.0006 x 3600 ksi = 2.16 ksi

Flexural membercompression

tension


10/11

Stress strain Relationship

Steel


11/11

Yang harus dipersiapkan untukPertemuan III

Pelajari :

SNI Beton : Pasal 12 . 1 12.6 Buku Disain Beton BertulangBab III. Kekuatan dari

Penampang Persegi di dalamLentur

pak kamta 1

Documents