低矮型鋼筋混凝土剪力牆之實驗與分析研究

The Experiment and Analysis of Low-rise Shear Walls In-filled in RC Frames

司順瑋(Shuen-Wei Ssu)

指導教授 ： 李有豐

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00213

摘要

本研究經由RC剪力牆之線彈性分析設計了一抑制裂縫配筋方法，另外建立一簡易分析模型可用以模擬低矮型RC剪力牆，並規劃實驗以驗證其可行性。研究步驟，首先是找出可抵抗剪力裂縫之配筋方法，以工程應用軟體SAP2000建構純牆體模型作線性靜力側推分析，以確認牆體彈性時之內力分佈，然後將設計之抵抗剪力裂縫配筋與內力分佈圖作比較，以檢核設計配筋(簡稱為改良配筋)之可行性；配合理論建立低矮型RC剪力牆之分析模型，對於構架柱的部份，配合Mander等人之混凝土圍束組成律(Mander et al., 1988)，使用軟體Response-2000建立斷面之彎矩與曲率關係；而牆體部份，則依據等值柱理論建立等效於牆體之「牆柱」，引用「軟化壓拉桿簡算法」估算等值柱構件塑鉸之降伏點，此外由彙整之RC牆實驗數據歸納出塑鉸性質之後續各點，之後將各構件的斷面與彎矩曲率關係代入軟體SAP2000建製牆體模型作非線性靜力推覆分析(Pushover)；實驗部份，設計兩座試體包括RC韌性空構架一座、與含RC剪力牆RC韌性構架一座於國家地震中心實驗，實驗方式決定以位移控制之反覆載重側推至牆體破壞。經分析與實驗結果可以觀察到改良配筋想法確實可以對應到裂縫發生的位置與方向，而等值柱理論的分析結果亦可以有效的估算低矮型牆體之力與位移包絡線。

關鍵字

低矮型RC剪力牆 ； 等值柱 ； 非線性靜力推覆分析

並列摘要

In this research, an analysis model and a new type of reinforcement detail for shear walls were developed by numerical modeling and experiments. After performing static plane stress analysis by using SAP2000 program, the magnitudes and directions of maximum principal stress and shear stress were found. By comparing the analysis results with the tensile strength and shear strength of concrete, we get the crack models of shear walls and the new designed shear wall was developed accordingly. In order to verify the viability of the new design, we built a pure frame and a shear wall in-filled in frame specimens for cyclic load test. For analysis, the columns of the frame were modeled by utilizing the Mander’s model and the wall is analyzed by an effective analysis model which named “equivalent column”, proposed by Li et al. (2007). In SAP 2000 program, we set the hinge properties in frame obtained with Response-2000 program, and the hinge property in wall were obtained using softened strut-and-tie model and multiple regression analyses with five RC wall specimens’ data. Nonlinear pushover analyses were performed on the numerical model using SAP2000. After the comparing the test results and analysis results, we found that the new type of reinforcement detail for shear walls can prevent most cracks. The analysis results by equivalent column model were also close to the experiment data.

並列關鍵字

Low-rise Shear walls ； Equivalent column ； Nonlinear static pushover analysis

參考文獻

[40] 陳振瑋(2005)，以等值柱模型分析含牆RC構架，碩士論文，國立台北科技大學土木與防災研究所，台北。

[1] Anil, Ö. and Altin, S. (2007). “An Experimental Study on Reinforced Concrete Partially Infilled Frames,” Engineering Structures, Vol. 29, No. 3, pp. 449-460.

[3] Ghobarah, A. and Youssef, M. (1999). “Modelling of Reinforced Concrete Structural Walls,”　Engineering Structures, Vol. 21, No. 10, pp. 912-923.

[4] Hsu, T. T. C. (1998). “Unified Approach to Shear Analysis and Design,” Cement and Concrete Composites, Vol. 20, No. 6, pp. 419-435.

[5] Huang, C. L., Li, Y. F. and Lin, C. T. (2008). “Analytical Study on the Force-Displacement Relationship of RC Shear Walls,” submitted to Canadian Journal of Civil Engineering.