Post-tensioned timber frame structures:
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis Book |
| Language: | English |
| Published: |
Zurich
Institut für Baustatik und Konstruktion der ETH
2015
|
| Series: | IBK Bericht
Nr. 364 |
| Subjects: | |
| Online Access: | Inhaltsverzeichnis |
| Physical Description: | x, 158 Seiten Illustrationen, Diagramme |
Staff View
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| 100 | 1 | |a Wanninger, Flavio |d 1984- |e Verfasser |0 (DE-588)1080664750 |4 aut | |
| 245 | 1 | 0 | |a Post-tensioned timber frame structures |c Flavio Wanninger |
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Record in the Search Index
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| adam_text | Contents
1 Introduction 1
11A simple beam to column connection as motivation 1
1 2 Research objective and thesis outline 2
2 State of the art 5
2 1 Early attempts of prestressing timber 5
2 2 The PRESSS - System 5
2 3 Post-tensioned timber structures using unbonded tendons 6
231 Pres-Lam® 6
232 Post-tensioned timber beams and frames for gravity loads 7
233 Long-term behaviour 8
234 Structures with unbonded post-tensioned timber elements 8
3 Analytical model 13
3 1 Simplified spring model 13
3 2 Modulus of subgrade reaction 14
3 3 Equations for stresses, rotation and neutral axis depth 16
331 Before decompression 16
332 After decompression 17
333 Gap reaches the tendon 18
334 Shear deformations 19
335 Compression failure 21
3 4 Horizontal loads and pushover curve 22
341 Ultimate limit state 23
4 Connection tests 25
4 1 Material and test setup 25
4 2 Instrumentation 27
4 3 Testing program 28
4 4 Experimental analysis - equations 30
441 Structural behaviour 30
viii CONTENTS
442 Key variables 31
4 5 Experimental analysis - test evaluation 33
451 Test with a high tendon force 34
452 Test with an intermediate tendon force 36
453 Test with low tendon force 39
454 Test with a high load level 41
4 6 Comparison tests and analytical model 43
461 Test with a high tendon force 43
462 Test with an intermediate tendon force 44
463 Test with a low tendon force 46
464 Test with a high load level 47
4 7 Experimental analysis - discussion 49
471 Initial stiffness 49
472 Defining the level of post-tensioning 52
473 Controlling parameters 53
474 Position of the tendon 53
475 Ash reinforcement 54
5 Pushover tests 55
5 1 Specimen and test setup 55
511 Specimen 55
512 Test setup 57
513 Measuring instrumentation 57
5 2 Experimental analysis 59
5 3 Experimental analysis for the dynamic tests 60
5 4 Test results 62
541 Tests with a high tendon force 62
542 Test with an intermediate tendon force 63
543 Tests with a low tendon force 64
5 5 Comparison model and test results 65
551 Pushover-curves 65
552 Rotations at the connections 65
5 6 Experimental analysis - discussion 67
561 Dynamic tests 67
562 Pushover tests 68
6 Numerical model 73
6 1 Model for connection tests 73
611 Geometry and material properties 73
612 Elements and material tags 75
613 Recorders 75
CONTENTS ix
614 Analysis 76
615 Predictions from the elastic model for the symmetric load case 76
616 Predictions from the plastic model for the symmetric load case including
grain crushing 77
617 Predictions from the orthotropic model for the asymmetrical load cases 78
6 2 Frame model for pushover tests 78
621 Elements and material tags 79
622 Recorders 80
623 Analysis 80
624 Predictions from the numerical model for pushover analysis 80
625 Parametric study 81
6 3 Discussion 82
7 Long-term behaviour 83
7 1 Specimens and test setup 84
711 Block specimens 84
712 Beam-column specimens 85
713 Beam specimens 86
714 Dummies 86
715 Tendon 86
7 2 Experimental programme 87
721 Tests in the controlled environment 87
722 Tests in the uncontrolled environment 88
723 Test outdoors 89
724 Tendon force losses and their mechanisms 89
7 3 Test results - small block tests 90
731 Moisture content 90
732 Creep tests 92
7 4 Test results - beam and frame specimens in the controlled environment 96
741 Moisture content 96
742 Losses in tendon force 96
7 5 Test results - beam and frame specimens in the uncontrolled environment 98
751 Moisture content 98
752 Losses in tendon force 98
7 6 Test results - frame specimen outdoors 99
761 Moisture content 99
762 Losses in tendon force 100
7 7 Test evaluation - beam-column specimens 101
771 Influential factors 101
772 Pure creep 101
773 Mechano-sorption 102
X
CONTENTS
774 Column depth 104
775 Re-stressing 105
7 8 Analytical model for losses in the beam and beam-column specimens 106
781 Comparison between model and test results with creep coefficients from
block specimens 107
7 9 Parametric study Ill
7 10 Discussion and limitations 112
8 Prototype design 113
8 1 Structure 114
811 Post-tensioned timber frame 114
812 Composite slabs 114
8 2 Loads 116
8 3 Design for gravity loads 116
831 Load application on the frame 116
832 Design with a simple hand calculation 117
833 Design using OpenSees 119
8 4 Seismic design 121
841 Response spectra and performance goals 121
842 OpenSees model 121
8 5 Wind loads 127
8 6 Time history analyses 128
861 Umbria earthquake 129
862 Patti earthquake 131
863 Aquila earthquake 132
8 7 Discussion 133
9 Conclusions 135
10 Outlook 141
Nomenclature 145
Bibliography
|
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| spelling | Wanninger, Flavio 1984- Verfasser (DE-588)1080664750 aut Post-tensioned timber frame structures Flavio Wanninger Zurich Institut für Baustatik und Konstruktion der ETH 2015 x, 158 Seiten Illustrationen, Diagramme txt rdacontent n rdamedia nc rdacarrier IBK Bericht Nr. 364 Dissertation ETH Zurich 2015 Holzbau (DE-588)4025677-7 gnd rswk-swf Vorspannung (DE-588)4188723-2 gnd rswk-swf Tragwerk (DE-588)4060592-9 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Holzbau (DE-588)4025677-7 s Tragwerk (DE-588)4060592-9 s Vorspannung (DE-588)4188723-2 s DE-604 IBK Bericht Nr. 364 (DE-604)BV001894621 364 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=029223463&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Wanninger, Flavio 1984- Post-tensioned timber frame structures IBK Bericht Holzbau (DE-588)4025677-7 gnd Vorspannung (DE-588)4188723-2 gnd Tragwerk (DE-588)4060592-9 gnd |
| subject_GND | (DE-588)4025677-7 (DE-588)4188723-2 (DE-588)4060592-9 (DE-588)4113937-9 |
| title | Post-tensioned timber frame structures |
| title_auth | Post-tensioned timber frame structures |
| title_exact_search | Post-tensioned timber frame structures |
| title_full | Post-tensioned timber frame structures Flavio Wanninger |
| title_fullStr | Post-tensioned timber frame structures Flavio Wanninger |
| title_full_unstemmed | Post-tensioned timber frame structures Flavio Wanninger |
| title_short | Post-tensioned timber frame structures |
| title_sort | post tensioned timber frame structures |
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| topic_facet | Holzbau Vorspannung Tragwerk Hochschulschrift |
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