kan full thesis

Download Kan Full Thesis

Post on 30-Sep-2014

135 views

Category:

Documents

5 download

Embed Size (px)

TRANSCRIPT

2549 ISBN 974-533-602-5 DEVELOPMENT OF PRECAST PARTIALLY-PRESTRESSED CONCRETE BEAMS FOR SMALL BUILDINGS Kan Kumlue A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Engineering in Civil Engineering Suranaree University of Technology Academic Year 2006 ISBN 974-533-602-5 : (DEVELOPMENT OF PRECAST PARTIALLY-PRESTRESSED CONCRETE BEAMS FOR SMALL BUILDINGS) : . , 126 . ISBN 974-533-602-5 2 3 175 mm 350 mm 4.0 m 3 18 ... 1009-34 ... 1008-38 14%, 29% 33% 22%, 32% 31% 2 flexure failure 2549 KAN KUMLUE : DEVELOPMENT OF PRECAST PARTIALLY-PRESTRESSED CONCRETE BEAMS FOR SMALL BUILDINGS. THESIS ADVISOR : ASSOC. PROF. SITTICHAI SEANGATITH, Ph.D. 126 PP. ISBN 974-533-602-5 PRECAST PARTIALLY PRESTRESSED CONCRETE BEAMS, TRANSVERSE LOAD. The objective of this research is to study the behavior of partially prestressed concrete precast (P.C.) beams compared to that of reinforced modified concrete precast (R.C.) beams and to compare the strength with that provided by the design equations of the Institute of Engineers, Thailand (EIT) building code. The 2 types of beam were designed to failed in 3 modes namely: flexure-shear crack, tension crack and compression crack. The beam specimens were 175 mm wide, 350 mm deep and 4.0 m long (effective). Three specimens were constructed for each failure mode. The P.C. beams were designed using the elastic theory and checked using the ultimate strength method (EIT.1009-34). The R.C. beams were designed using the ultimate strength method (EIT.1008-38). It was found that for beams designed to fail by flexure-shear crack, both the P.C. and the R.C. beams behaved similarly. For beams designed to fail by tension crack, the P.C. beams had higher strength than the R.C. beams by 14%, 29% and 33% at working point, reinforcementss yield point and at ultimate point, respectively. For beams designed to fail by compression crack the R.C. beams had higher strength than the P.C. beams by 22%, 32% and 31% at the working point, the yield point and at the ultimate point, respectively. Both types of beam had flexural failure as designed. Comparing the ratio of cost to strength at the working point and the yield point, it was found that the P.C. beams were more efficient than the R.C. beams. School of Civil Engineering Students Signature Academic Year 2006 Advisors Signature . . . . () .................................................................................................... () ............................................................................................... ........................................................................................................ ........................................................................................................................ .............................................................................................................. ................................................................................................................... ....................................................................................... 1 ....................................................................................................................................1 1.1 .........................................................................1 1.2 ...............................................................................................2 1.3 ......................................................................................................2 1.4 .........................................................................3 2 ................................................................................4 2.1 .............................................................................................................................4 2.2 .................................................................4 2.3 .............................................................................................5 2.4 .......................................................................................................8 2.4.1 ........10 2.4.2 ...............................................................14 2.4.3 ....................................................16 2.4.4 ..............................................................................18 3 ..........................................................................................................24 3.1 ...........................................................................................................................24 ( ) 3.2 .................................................................................................24 3.3 ...........................................................28 3.3.1 ..........28 3.3.2 ......................34 3.3.3 ...................42 3.4 ...........................................................43 3.5 .................................................43 3.5.1 ...............................................................43 3.5.2 .....................................................................44 3.5.3 ......................................................................44 3.6 ...................................................................................44 3.7 ..............................................................................................49 3.8 ....................................................51 4 .............................................................................................54 4.1 ...........................................................................................................................54 4.2 ....................................................................54 4.3 .................................................................................55 4.3.1 ..........................................55 4.3.2 .......................................................59 4.3.3 .......................................................64 4.3.4 ....................................................................................................68 4.4 ..............................................69 5 ...................................................................................................................71 5.1 ...........................................................................................................................71 5.2 .......................................................................................................71 5.2.1 .......................................................................71 ( ) 5.2.2 .................................................................................................72 5.3 .....................................73 5.4 ...................................................................................................73 5.5 ....................................................................................73 5.6 ................................................................................73 ...................................................................................................................................74 Hydraulic ram...........................................................76 ..............................................................................................78 .1..............................................................................................................79 .2 ..........................................................................................................86 .3 .........................................................................................................89 ..............................................................92 .1 ..........................................................93 .2 ............................94 .3 ...........................................................97 .......................................................................................98 .1 ..................................99 .2 .....................103 .3 ...........104 Spreadsheet excel ..................................................105 .1 Spreadsheet .........................................................................................106 .2 Spreadsheet .........................................................................................115 ( ) .................................................................121 .............................................................123 .......................................................................................................................126 2.1 AFRP ........................................ 6 2.2 .............. 19 2.3 ....