Introduction b Structural Design and Analysis, and Code ...

1 1 Fifth EditionReinforced Concrete Design A. J. Clark School of Engineering Department of Civil and Environmental 355 - Introduction to Structural DesignDepartment of Civil and Environmental EngineeringUniversity of Maryland, College ParkStructural Design and analysis , and Code SpecificationsFALL 2002 ByDr . Ibrahim. AssakkafINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 1 ENCE 355 AssakkafStructural Design Structural Design can be defined as a Structural Design can be defined as a mixture of art and Science, combining mixture of art and Science, combining the engineer s feeling for the behavior the engineer s feeling for the behavior of a structure with a sound knowledge of a structure with a sound knowledge of the principles of of the principles of staticsstatics, dynamics, , dynamics, mechanics of materials, and Structural mechanics of materials, and Structural analysis , to produce a safe economical analysis .

2 To produce a safe economical structure that will serve its intended structure that will serve its intended purpose. purpose. (Salmon and Johnson 1990) 2 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 2 ENCE 355 AssakkafEngineering SystemsQEngineering Structural systems are of variety that they defy any attempt to enumerate many problems which arise in their Design have prompted engineers to specialize in the Design of particular structure or groups of related complete Design requires the coordinated efforts of several branches of b.

3 Structural Design & analysis , & Code SpecificationsSlide No. 3 ENCE 355 AssakkafEngineering SystemsQCivil Engineering Structures Among the structures that are Design by civil engineers are Buildings Bridges Transmission Towers Dams Highway Pavements Aircraft Landing Runways (strips) Retaining Walls3 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 4 ENCE 355 AssakkafEngineering SystemsEiffel TowerEiffel TowerParis Paris 18991899984 ft. high984 ft. highINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No.

4 5 ENCE 355 AssakkafEngineering SystemsSears TowerSears TowerChicago Chicago --197419741450 b. Structural Design & analysis , & Code SpecificationsSlide No. 6 ENCE 355 AssakkafRHINE BRIDGE, COLOGNERHINE BRIDGE, COLOGNE--RODENKIRCHEN, (1946 RODENKIRCHEN, (1946--47), SPAN ), SPAN mEngineering SystemsINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 7 ENCE 355 AssakkafEngineering Systems5 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 8 ENCE 355 AssakkafHoover DamHoover DamArizonaArizona--Nevada BorderNevada BorderNear Las VegasNear Las VegasEngineering SystemsINTRODUCTION b.

5 Structural Design & analysis , & Code SpecificationsSlide No. 9 ENCE 355 AssakkafTransmission TowersTransmission TowersEngineering Systems6 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 10 ENCE 355 AssakkafEngineering SystemsHighway & AircraftHighway & AircraftLanding StripLanding StripINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 11 ENCE 355 AssakkafEngineering SystemsRetaining WallsRetaining Walls7 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 12 ENCE 355 AssakkafEngineering SystemsQThe Design of the previous groups of structures require the coordination of various disciplines in engineering, and is too large for convenient study as a this course, we will focus on the Design of the individual Structural elements or members that make up the whole Structural system.

6 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 13 ENCE 355 AssakkafEngineering SystemsQSuch members or elements include the following: Beams Columns Trusses Shear Structural Elements Steel Rods Connection Elements8 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 14 ENCE 355 AssakkafEngineering SystemsQStructural Elements Bending StructuresINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 15 ENCE 355 AssakkafEngineering SystemsQStructural Elements Compression Structures9 Introduction b.

7 Structural Design & analysis , & Code SpecificationsSlide No. 16 ENCE 355 AssakkafEngineering SystemsQStructural Elements TrussesINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 17 ENCE 355 AssakkafEngineering SystemsQStructural Elements Tension Structures10 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 18 ENCE 355 AssakkafEngineering SystemsINTRODUCTION b. Structural Design & analysis , & Code SpecificationsSlide No. 19 ENCE 355 AssakkafEngineering SystemsQStructural Elements Shear Structures11 Introduction b.

8 Structural Design & analysis , & Code SpecificationsSlide No. 20 ENCE 355 AssakkafAnalysis Versus DesignQStructural analysis : Structural analysis is the prediction of the performance of a given structure under prescribed loads and/or other effects, such as support movements and temperature b. Structural Design & analysis , & Code SpecificationsSlide No. 21 ENCE 355 AssakkafAnalysis Versus DesignQStructural Design : Structural Design is the art of utilizing principles of statics, dynamics, and mechanics of materials to determine the size and arrangement of Structural elements under prescribed loads and/or other b.

9 Structural Design & analysis , & Code SpecificationsSlide No. 22 ENCE 355 AssakkafAnalysis Versus DesignQDesign Procedure Design procedure consists of two parts: Functional Design Structural Framework Design Functional Design ensures that intended results are achieved such as adequate working area, elevators, stairways, etc. Structural framework Design is the selection of the arrangement and sizes of Structural elements so that service loads may be b. Structural Design & analysis , & Code SpecificationsSlide No. 23 ENCE 355 AssakkafAnalysis Versus Design13 Introduction b.

10 Structural Design & analysis , & Code SpecificationsSlide No. 24 ENCE 355 AssakkafAnalysis Versus DesignQExample 1: analysis Determine the maximum flexural stress produced by a resisting moment Mrof +5000 ft lb if the beam has the cross section shown in the 6 2 2 Introduction b. Structural Design & analysis , & Code SpecificationsSlide No. 25 ENCE 355 AssakkafAnalysis Versus DesignQExample 1: analysis (cont d)First, we need to locate the neutral axis from the bottom edge:()()()()xrCIyMyyyymaxmaxcomten Stress 33247262626232621== = += = == + ++ =5 6 3 C2 14 Introduction b.