臺灣博碩士論文加值系統

Structure orientation toward the wind direction is the most critical problem to be considered. In some cases, site design has been initially determined due to the plan area or the urban artistic, and if the wind blow in a strong directionality that would become a failure for the building. This research presents the sensitivity of the structural orientation and takes the case study of CAARC Building located on Taipei. Response base moment from wind tunnel test data in a function of natural wind direction angle could be transformed into structural responses such as top story acceleration and displacement for x and y axis component. The structural response depends on the building performance. The structure response could be very sensitive to the structural orientation. Besides that it also describes the effect when structural orientation changed a bit, it would decrease or increase the effect of building.

Structure orientation toward the wind direction is the most critical problem to be considered. In some cases, site design has been initially determined due to the plan area or the urban artistic, and if the wind blow in a strong directionality that would become a failure for the building. This research presents the sensitivity of the structural orientation and takes the case study of CAARC Building located on Taipei. Response base moment from wind tunnel test data in a function of natural wind direction angle could be transformed into structural responses such as top story acceleration and displacement for x and y axis component. The structural response depends on the building performance. The structure response could be very sensitive to the structural orientation. Besides that it also describes the effect when structural orientation changed a bit, it would decrease or increase the effect of building.

Abstract ................................................................................................................... ii
Acknowledgement ......................................................................................................... iii
Table of Contents ........................................................................................................... iv
Table of Figures ............................................................................................................. vi
List of Tables ................................................................................................................ vii
Notations ................................................................................................................ viii
Chapter 1 Introduction ................................................................................................... 1
1.1 Background ........................................................................................... 1
1.2 Research Objective ............................................................................... 1
1.3 Scope of Research ................................................................................. 1
1.4 Organization of Thesis .......................................................................... 1
Chapter 2 Literature Review ...................................................................................... 2
2.1 Wind Directionality Effect .................................................................... 2
2.2 Wind Induced Base Moment Loading and Response ........................... 2
2.3 Maximum Interstory Drift ..................................................................... 4
2.4 Top Story Maximum Acceleration ....................................................... 6
2.5 Weighted Averages ............................................................................... 7
Chapter 3 Evaluation of Structure Response Due To Relative Wind Direction ........ 9
3.1 General .................................................................................................. 9
3.2 Problem Geometry ................................................................................ 9
3.3 Flow of Work ...................................................................................... 11
3.4 Base Moment Data .............................................................................. 13
3.5 Normalization of Base Moment Response ......................................... 16
3.5.1 Mean Base Moment Coefficient ......................................................... 16
3.5.2 Maximum Base Moment Coefficient .................................................. 18
3.5.3 Background Base Moment Response Coefficient .............................. 22
3.5.4 Resonance Base Moment Response Coefficient ................................. 26
3.6 Wind Environmental Data .................................................................. 30
3.7 Calculation of Base Moment Response .............................................. 33
3.7.1 Maximum Base Moment Response due to 50 year period of Taipei Wind Speed Data ................................................................................ 34
v
3.7.2 Resonance Base Moment Response due to 0.5 year period of Taipei Wind Speed Data ................................................................................ 35
3.8 Calculation of Interstory Drift ............................................................ 37
3.8.1 Calculation of Maximum Top Story Displacement ............................ 37
3.9 Calculation of Top Story Acceleration at Centre of Building ............ 39
3.10 Weighted Average of Structural Response at 0?a of Structure Orientation .......................................................................................... 41
3.11 Evaluation of structure response when Structure orientation is 0?a ..... 42
Chapter 4 Responses of Structure with Given Orientation for Different Wind Direction .................................................................................................. 43
4.1 General ................................................................................................ 43
4.2 Structural Response in a function of Relative Wind Direction

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