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標題: | 鋼板剪力牆之有限元素分析與耐震設計研究 FEM Analysis and Seismic Design of Steel Plate Shear Wall Structure |
作者: | Wang-Da Hsieh 謝旺達 |
指導教授: | 蔡克銓 |
關鍵字: | 鋼板剪力牆,有限元素分析,耐震設計, Steel Plate Shear Wall,FEM Analysis,Seismic Design, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | 鋼板剪力牆是藉由鋼板易挫屈的特性,使鋼板發生挫屈之後產生拉力場(Tension Field),由鋼板所形成的拉力場來抵抗側力並消散外力所輸入的能量,多項實驗證明其具有良好的韌性與抗剪能力,可以有效地消散地震能量。本研究以國家地震工程研究中心已完成之鋼板剪力牆之實體構架進行有限元素分析模擬,研究之目的是希望能透過比STRIP MODEL簡化模型更精準的FEM板殼元素分析方式來研究鋼板剪力牆結構行為。
本研究分析項目為:(1)分析模型建立與模擬未束制型試體的挫屈行為與進入非線性時之反應,(2)利用模擬方式分析束制型鋼板剪力牆行為反應,(3)針對抗彎構架之樑是否要採取樑翼切削設計的效用做出評估,(4)探討鋼板剪力牆耐震行為與周圍抗彎構架(MRF)之樑容量設計,並檢核其軸力-彎矩(P-M)互制行為。 本研究結果顯示:有限元素法可以準確分析鋼板挫屈後拉力場行為,MRF之樑使用樑翼切削設計時,對耐震行為有其效果;而針對不同模型進行非線性側推之分析,發現在滿足彎矩需求下設計外圍MRF,於極限狀態下MRF承擔之基底剪力比例約為系統50%;而設計不滿足彎矩需求的弱樑,得知MRF由於不能承受拉力場的完全發展,使鋼板拉力場無法發揮至極限強度,因而降低剪力牆的耐震能力。 In recent years, several researchers have confirmed that steel plate shear wall (SPSW) is a very effective energy dissipation element to reduce seismic responses of building structures. It has been investigated for the use in retrofit and new design as a primary lateral force resisting system in building structures. Researchers have also confirmed that SPSWs constructed with buckling restrainers dissipated more energy compared with the unrestrained SPSWs. However, detailed ABAQUS analysis made for large scale test specimens are rather limited. For this purpose, the objectives of this study include: 1) conduct FEM model development and make detailed comparisons among FEM and test results, 2) after achieving an accurate model, investigate the development of tensional field action, the shear force distribution between the boundary frame and the steel panel at various levels of deformation, 3) investigate the effects of boundary member’s stiffness and strength on the performance of SPSW, 4) investigate the effects of reduce beam section (RBS) of FEM boundary beams on the flexural demand of boundary beam-to-bundary column connections, 5) investigate the capacity design criteria of the boundary beam elements. Based on the investigation of different several analytical cases, recommendations are presented for the ductile design of SPSW the beams of boundary frame and the SPSW systems. ABAQUS analysis is used first to investingate the overall behavior of the four single story single bay SPSWs tested in NCREE. It is illustrated that the hysteretic responses of the three SPSW specimens can be accurately simulated by using a tri-linear combined isotropic-and-kinematic hardening material model. In addition, it is found the FEM model without restrainers had an elastic stiffness of 607MN/radian, only overestimate the experimental stiffness by 5%. It is confirmed from the FEM analysis that a flexural requirement of wl2/4 for the boundary beam is appropriate based on the ultimate vertical tension load w. It is also confirmed from the FEM analysis that the tension field action of SPSWs could not be adequately developed if the flexural capacity of the boundary beam is weaker than the strength noted above. If the capacity design principle is properly applied on the SPSWs, FEM analysis illustrates that the boundary columns take about 30% story shear at a low level inter-story drift of about 0.5%~0.7% radians but gradually increase up to 50% story shear at an interstory drift of 0.05 radian. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25767 |
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顯示於系所單位: | 土木工程學系 |
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