形狀記憶合金於抗震RC耦合牆系統之初步研究

顏偉閔(Wei-ming Yen)

指導教授 ： 洪崇展

國立中央大學/工學院/土木工程學系/碩士(2014年)

摘要

本研究目的為探討使用鎳鈦形狀記憶合金(Ni-Ti Shape Memory Alloy，之後簡稱SMA)提升結構抗耐震能力之有效性，研究可分為實驗與分析兩部分，實驗方面使用高性能纖維水泥複合材料(High Performance Fiber Reinforced Cementitious Composites，之後簡稱HPFRCCs)與SMA於懸臂梁試體之塑鉸區，並且施以非線性反覆加載實驗來探索使用HPFRCCs與SMA對於構件所能提升之效能。
分析方面則探討使用SMA於中高層RC耦合結構牆之塑鉸區時，整體結構系統所能提升之抗耐震能力。研究首先建立鋼筋混凝土與HPFRCCs結構構件之數值分析模型，其中使用修正壓力場理論建立結構構件之剪力與剪力變形之關係，並藉由文獻中連接梁構件的實驗結果，進行模型驗證與參數研究。而後建立六座中高層耦合牆系統之分析模型，系統參數為耦合率（50%與60%）、以及連接梁與結構牆塑鉸區內之SMA棒，之後使用非線性側推分析、反覆加載分析、以及進行不同層級地震下的非線性動力分析，探討使用SMA於耦合結構牆所能提升之性能。結果顯示，SMA無論於實驗或是分析中皆能發揮其超彈性性能，減少結構體於加載後之殘留變形。

關鍵字

鎳鈦形狀記憶合金 ； 高性能纖維水泥複合材料 ； 懸臂梁

並列摘要

The objective of this study is to explore the effectiveness of using Ni-Ti Shape Memory Alloy (SMA) in structures for increasing the seismic performance of earthquake-resistant structures. The study can be divided into two parts, i.e., the experimental program and computational investigation.
In the experimental program, four different cantilever beams are designed. The parameters include: 1) using High Performance Fiber Reinforced Cementitious Composites (HPFRCCs) to replace the traditional concrete material, 2) using SMA to replace the longitudinal steel bars in the plastic hinge regions of the cantilever beams, and 3) using plastic tape and oil on the longitudinal steel bars in the plastic zone of the beam to reduce the bond between rebar and concrete. The performance of the beams is evaluated using cycle-loading test.
In the computational investigation, SMA bars are employed in the critical regions in the RC coupled wall systems. The performance of the coupled wall systems is evaluated using nonlinear static analysis with cyclic loading and nonlinear dynamic analysis. The shear behavior of the structural component is addressed using the Modified Compression-Field Theory. The developed shear model is evaluated using the experimental results of several RC coupling beams in the literature. Six coupled wall systems are designed. The design parameters include the coupling ratios (50% and 60%) and the use of SMA bars in the coupling beams or the shear walls. The analysis results show that the use of SMA in the coupled wall systems is able to substantially reduce the residual deformation of the systems after the earthquake events.

並列關鍵字

Ni-Ti Shape Memory Alloy ； High Performance Fiber Reinforced Cementitious Composites ； Cantilever Beams

參考文獻

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