Lecture 1 Advance Design of RC Structure

Advance Design of RC Structure

Lecture 1

Course Syllabus

Warm welcome to everybody at our inspiring institute

University of Palestine

Lecture 1 Advance Design of RC Structure

SubjectCourse: Advance Design of RC Structure

Prerequisite: Design II

Class Room: BK-

202Semester:

2nd

2009

Grads: Assignments

30%Midterm exam

30%Final exam

40%

Tutor: M.Sc. Malek Abuwarda

engm01@hotmail.com

Lecture 1 Advance Design of RC Structure

Instructional Objectives Upon completion you would be able to: Workout the equivalent seismic load & wind

load on a building DesignReinforced concrete shear wall, that can

withstand the lateral load of the equivalent seismic load & wind load Retaining wallRectangular and circular tanksMat foundation

Lecture 1 Advance Design of RC Structure

Course Outline Seismic designIntroductionGeneral informationCauses of earthquakeSeismic wavesThe effects of seismic on structures

Method of analysis of structures under seismic loadEquivalent static load methodSymmetrical shear wallUnsymmetrical shear wallCore

Lecture 1 Advance Design of RC Structure

Course Outline Continued . . .

Using computer program SAP2000 or ETABS to analysis the equivalent static load on tall building I if applicable Shear wall design

Wind LoadWind pressureWind load & distribution

Retaining wallTypes Geotechnical designStructural design

Lecture 1 Advance Design of RC Structure

Course Outline Continued . . . TanksGeneral informationRectangular tankCircular tank

Mat foundationGeneral informationGeotechnical designStructural design

Lecture 1 Advance Design of RC Structure

Course Materials Lecture notesPower points slidesHandout sheets

Textbooks

Uniform Building Code UBC 1997

International Building Code IBC 2002ACI-

318 2005Reinforced Concrete Design Dr. Samir ShihadaEarthquake Engineering: Application to Design.

Charles K. Erdey

Lecture 1 Advance Design of RC Structure

What Causes Earthquake The Earth & its interior

Inner Core

1290 km Radius Outer Core

2200 km thicknessThe Mantle

2900 km thicknessCrust

5-

40 km thickness

The circulationConvection currents develop in the

viscous Mantle, because of different pressure and temperature between the Crust & the Core That result in circulation of the

Earths mass. Hot Lava comes out & the cold rock mass goes into the Earth

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . .n Plate Tectonics Flows of Mantle material cause the crust to slide

on the hot molten outer core

Sliding of earth mass takes place in pieces called Tectonic Plates

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . . The surface of the earth consists of seven major

Tectonic Plates and many smaller ones Plates move in different directions

Average movement of plate boundary 2-

10 cm per year

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . .n The Earthquake Rocks are made of elastic material Elastic strain energy is stored Rocks reach their strength Sudden movement takes place Crack in the rocks formed

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . . Sudden slip taken place & release the enormous elastic

strain energy stored The sudden slip (EARTHQUAKE) causes a violent

shaking of the earth & the released energy spreads out through SEISMIC WAVES that travel in all direction through the earths layers

n Seismic WavesTwo types of waves Body waves Surface waves

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . .n Body Waves Primary waves (P-Waves) Extension & compression action

Speed 4.8 km/s (fastest) Secondary waves (S-Waves) Vertical & horizontal action

Speed 3 km/s

n Surface Waves Love waves Horizontal component action

Rayleigh waves Vertical component action

Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . . Measuring instruments

Seismograph

Some typical recorded

Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Inertia force in structure

Seismic waves shaking the groundBuilding base moves with the groundUpper body has tendency to stay in its original positionWalls & columns drag the upper body along with them

Lecture 1 Advance Design of RC Structure

Effects of Seismic on StructuresIts much like when the ground moves, the building is

thrown backward or the upper body experience a force called INTERIA FORCE

Newtons second law of motionUpper body has a mass mExperience an acceleration aThen F (inertia force) = m.a

a

F

I That means the more mass the greater F (inertia force) you get

F so the lighter buildings sustain seismic better

Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Effect of deformations in structures

Columns undergo relative movement between their endsTransfer the inertia force from the upper body of the

building to the ground

Lecture 1 Advance Design of RC Structure

Effects of Seismic on StructuresColumns resist deformation so develop inertia forces,

which called stiffensWalls & columns are the most critical elements in

resisting seismic

Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Horizontal & vertical shaking

Earthquake shakes the ground in all directionGround shakes randomly back and

forth (- & +) along in X, Y and Z directionAll structures are primarily

designed to curry downward force, which called gravity loadfactor of safety, used in the design

of structures, magnifying the design gravity load (dead load + live load + other loads)

x

YZ

Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Horizontal & vertical shaking

That means most of the designed structures adequate against vertical shaking

The horizontal shaking along X & Y direction (both + & - direction of each) is our big concern as a structural designer

Lecture 1 Advance Design of RC Structure

Discussions

Any Question?

Notes

Advance Design of RC StructureSubjectInstructional Objectives Course OutlineCourse Outline Continued . . .Course Outline Continued . . .Course MaterialsWhat Causes EarthquakeWhat Causes Earthquake Continued . . .What Causes Earthquake Continued . . .What Causes Earthquake Continued . . .What Causes Earthquake Continued . . .What Causes Earthquake Continued . . .What Causes Earthquake Continued . . .Effects of Seismic on StructuresEffects of Seismic on StructuresEffects of Seismic on StructuresEffects of Seismic on StructuresEffects of Seismic on StructuresEffects of Seismic on StructuresDiscussions