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姓名 英達(Indra Waluyohadi)  查詢紙本館藏   畢業系所 土木工程學系
論文名稱
(NUMERICAL INVESTIGATION ON SEISMIC RESPONSE OF FRAME STRUCTURE ON SHALLOW FOUNDATION WITH EXPANDED POLYSTYRENE (EPS))
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摘要(中) 過去三十年中EPS的工法逐漸被應用在土木領域,在先前的研究中,藉由了解發泡顆粒的力學行為,對工法的應用及發展有很大得助益,像是發泡顆粒能減少側向土壓力(Horvath, 1996),隔震(Murillo et al, 2009; Zarnani and Bathurst, 2009),其中一個應用是將EPS裝設於大樑或是版的底下,而今的結構物常採用淺基礎,因此當EPS被應用且安置於淺基礎下,會減少地震對結構物的影響。
本研究中,採用D7S2有限元素軟體分析,將EPS應用於淺基礎結構物下,減少地震對結構物的影響之貢獻,並且經由震動台的測試結果與數值分析做比較與驗證。研究參數中包含了不同邊界面元素與不同元素的尺寸藉以探討EPS。
經研究發現EPS應用於淺基礎底下,如果沒有建立邊界元素,對結構物的地震反應並無太大的關聯性。藉由變化的EPS的尺寸,並應用於結構物的淺基礎底下,可以發現對與結構物的加速度反應還有位移反應有幫助。應用尺寸較大的EPS能減緩結構物的震動反應。
摘要(英) For the past 30 years applications of expanded polystyrene (EPS) geofoam has been proposed. Several studies have examined the behavior of geofoam and produced results beneficial in the evolution of its application such as: effectiveness of geofoam in reducing the lateral earth pressures (Horvath, 1996) and seismic vibration insulation (Murillo et al, 2009; Zarnani and Bathurst, 2009). One of application of expanded polystyrene can be used laid under the grade beam or slab. Meanwhile some of existing structure were suported by shallow foundation. Thus when EPS applied beneath shallow foundation to be alternative design, EPS supposed reduce the seismic response of structure.
In this study, the D7S2 finite element program was adopted to investigate the seismic response of structure due to apllication of EPS applied beneath the shallow foundation subjected to the earthquake motion. Verification and validation of the program was done first by comparing with shaking table test results. A series of parametric study is conducted including the interface element and the variations of size of EPS.
The use of EPS underneath shallow foundation do not show the correlation with the seismic response of structure if there is no interface element constructed. Variation of EPS size used were contributed to the acceleration and displacement of structure with shallow foundation. As the larger size of EPS applied, the larger reduction of seismic responses will be obtained.
關鍵字(中) ★ EPS
★ 界面元素
★ 數值研究
關鍵字(英) ★ Expanded Polystyrene(EPS)
★ interface element
★ numerical simulation
論文目次 摘要 i
ABSTRACT ii
LIST OF CONTENTS iii
LIST OF TABLES v
LIST OF FIGURES vi
NOTATIONS ix
CHAPTER 1 INTRODUCTION 1
1.1 Background 1
1.2 Research Objective 2
1.3 Organization of Thesis 2
CHAPTER 2 LITERATURE REVIEW 3
2.1 Expanded Polystyrene (EPS) 3
2.1.1 Introduction 3
2.1.2 Material Properties 3
2.1.3 User Benefits 5
2.1.4 Earlier Constitutive Models of EPS Geofoam 6
2.2 Applications of Expanded Polystyrene (EPS) 8
2.2.1 Ground Vibration Isolation 8
2.2.2 Application Involving Foundation Elements 10
CHAPTER 3 ANALYSIS METHOD 11
3.1 Introduction 11
3.2 Stiffness Matrix of Interface Element 11
3.3 Constitutive Relation for Soil 13
3.4 Solution Scheme 14
CHAPTER 4 VERIFICATION AND VALIDATION 16
4.1. Introduction 16
4.2. Description of Shaking Table Test 16
4.3. Description of Numerical Model 17
4.4. Input Motion 17
4.5. Discussion of Numerical Simulation 18
4.5.1. Natural Frequency 18
4.5.2. Response at Point 81 (Top of Single Column) 18
4.5.3. Response at Point 83 (Top of Concrete) 18
CHAPTER 5 NUMERICAL RESULTS AND DISCUSSIONS 20
5.1. Introduction 20
5.2. Model Description 20
5.3. Earthquake Input Motion 20
5.4. Natural Frequency 21
5.5. Effect of EPS Size 21
5.5.1. ChiChi Earthquake Input Motion 21
5.5.2. JR Takatori Earthquake Record Input Motion 22
5.5.3. Summary 23
5.6. Effect Interface Element 23
5.6.1. ChiChi Earthquake Input Motion 23
5.6.2. JR Takatori Earthquake Record Input Motion 25
5.6.3. Summary 26
CHAPTER 6 CONCLUSIONS AND RECOMMENDATIONS 27
6.1. Conclusions 27
6.2. Recommendations 27
REFFERENCES 28
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指導教授 陳慧慈(HUEI-TSYR CHEN) 審核日期 2014-7-24
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