版牆結構隔減震設計

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/64818

Title:	版牆結構隔減震設計
Authors:	白富毅;Bai,Fu-Yi
Contributors:	土木工程學系
Keywords:	隔震;阻尼器;ANSYS;ETABS;SAP2000;側推分析;歷時分析;版牆結構;base-isolation;damper;ANSYS;ETABS;SAP2000;pushover analysis;time-history analysis;slab - wall structure
Date:	2014-07-28
Issue Date:	2014-10-15 14:27:34 (UTC+8)
Publisher:	國立中央大學
Abstract:	摘要本研究主要探討一個經由在ㄧ樓設置隔震柱和安裝三鉸式阻尼器所完成的嶄新結構系統。在ㄧ開始先對新近得到專利的阻尼器之構造進行介紹，而為了找到合適的阻尼器設計參數，經由數值模擬和實驗驗證之方式，得到不同類型三鉸式阻尼器的力學性質。本研究也針對不同長寬比的三鉸式阻尼元件以數值模擬的方式進行參數研究，了解其應變、強度、勁度和韌性的關係，對之後在整體結構系統的設計上有非常大的幫助。本研究藉由示範模擬一棟地上六層、地下一層的鋼筋混凝土結構物，來說明整體結構系統的設計流程。結構模擬上，以桿元素來模擬牆柱和牆樑，剛桿來模擬牆柱和牆樑的接頭。在完成結構模型的建立後，再根據非線性的側推分析方法，在各樓層施加側向載重，來評估結構物的設計性能。此外，也參考非線性側推分析的結果，利用相同的基底剪力，來進行非線性動態歷時分析的評估和驗證。從分析結果可以觀察到結構物經由在第一層樓設置隔震柱和三鉸式阻尼器，整體所能承受的地震強度遠大於最大可能發生的地震。當實際的建築物受到劇烈的震動，隔震柱的塑性旋轉角皆在性能設計的生命安全等級內，且隔震層的相對樓層位移，也符合低韌性變形。由於塑性可以同時在隔震柱和三鉸式阻尼器上發生，所以結構物在承受強大的地震時，上部結構所承受的地震力幾乎為定值，因此，在隔震樓層上方適當設計的結構體，受震時為彈性狀態，不會導致明顯的混凝土龜裂。關鍵詞：隔震、阻尼器、ANSYS、ETABS、SAP2000、側推分析、歷時分析、版牆結構 ;ABSTRACT This research of a state-of-the-art structural system with aseismic columns and three-hinged dampers (THDs) in the first story (isolated story) has been accomplished. At first, the configurations of the newly patented damping devices were introduced. Then, their mechanical properties of several different types of THDs were investigated through both mathematical simulation and experimentation in order to obtain the corresponding design parameters. Finally, parametric studies with different aspect ratios of THDs were fulfilled to clarify the relationship among the stain, strength, stiffness and ductility, which will be beneficial to the aseismic design of building structures. To explain in detail the design procedure of the new aseismic structural system, a design example of 6-story building with one-story basement was demonstrated. During the structural analysis, the piers and spandrels of the building were modelled by using the frame members. In addition, the junctions between piers and spandrels were modelled by using the rigid member. After completing the structural modeling, the seismic lateral loadings were applied on the building according to the non-linear static pushover method to evaluate the performance-based design. Besides, the non-linear dynamic time-history analyses were carried out based on the same base-shear forces with the corresponding pushover cases. Observed from the analytical results, building with aseismic columns and THDs in the ground story can survive more than the design maximum credible earthquakes. When the practical building subjected to severe vibration, the plastic rotations of the aseismic columns are within the life-safety performance and the relative displacements of the isolated story are also within the low-ductility range. Owing to the plasticity can happen on both the aseismic columns and THDs when the strong earthquake shakes the building, the seismic forces in the upper stories are approximately constant. So, the upper part of the well-designed structure can deform elastically without resulting in apparent concrete cracks. KEYWORDS: base-isolation, damper, ANSYS, ETABS, SAP2000, pushover analysis, time-history analysis, slab - wall structure.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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