Advance Design of RC Structure

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Presentation transcript:

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

Advance Design of RC Structure Subject Course: Advance Design of RC Structure Prerequisite: Design II Class Room: BK-202 Semester: 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 Design Reinforced concrete shear wall, that can withstand the lateral load of the equivalent seismic load & wind load Retaining wall Rectangular and circular tanks Mat foundation Lecture 1 Advance Design of RC Structure

Advance Design of RC Structure Course Outline Seismic design Introduction General information Causes of earthquake Seismic waves The effects of seismic on structures Method of analysis of structures under seismic load Equivalent static load method Symmetrical shear wall Unsymmetrical shear wall Core 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  if applicable Shear wall design Wind Load Wind pressure Wind load & distribution Retaining wall Types Geotechnical design Structural design Lecture 1 Advance Design of RC Structure

Course Outline Continued . . . Tanks General information Rectangular tank Circular tank Mat foundation Geotechnical design Structural design Lecture 1 Advance Design of RC Structure

Advance Design of RC Structure Course Materials Lecture notes Power points slides Handout sheets Textbooks Uniform Building Code UBC 1997 International Building Code IBC 2002 ACI-318 2005 Reinforced Concrete Design Dr. Samir Shihada Earthquake 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 thickness The Mantle  2900 km thickness Crust  5-40 km thickness The circulation Convection currents develop in the viscous Mantle, because of different pressure and temperature between the Crust & the Core That result in circulation of the Earth’s mass. Hot Lava comes out & the cold rock mass goes into the Earth Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . .  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 . . .  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 earth’s layers  Seismic Waves Two types of waves  Body waves  Surface waves Lecture 1 Advance Design of RC Structure

What Causes Earthquake Continued . . .  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  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 ground Building base moves with the ground Upper body has tendency to stay in its original position Walls & columns drag the upper body along with them Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Its much like when the ground moves, the building is thrown backward or the upper body experience a force called INTERIA FORCE Newton’s second law of motion Upper body has a mass m Experience an acceleration a Then F (inertia force) = m.a F  That means the more mass the greater F (inertia force) you get  so the lighter buildings sustain seismic better a Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Effect of deformations in structures Columns undergo relative movement between their ends Transfer the inertia force from the upper body of the building to the ground Lecture 1 Advance Design of RC Structure

Effects of Seismic on Structures Columns resist deformation so develop inertia forces, which called stiffens Walls & 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 direction Ground shakes randomly back and forth (- & +) along in X, Y and Z direction All structures are primarily designed to curry downward force, which called gravity load factor of safety, used in the design of structures, magnifying the design gravity load (dead load + live load + other loads) x Y Z 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

Advance Design of RC Structure Discussions Any Question? Notes See you Wednesday All the best Lecture 1 Advance Design of RC Structure