有邊界構材之鋼板混凝土複合牆之耐震行為與試驗研究

An Experimental Study of In-Plane Behavior of Steel-Plate Composite Walls with Boundary Elements

鄭與錚(Yu-Cheng Cheng)

指導教授 ： 黃尹男

國立臺灣大學/工學院/土木工程學研究所/碩士(2016年)

https://doi.org/10.6342/NTU201601322

摘要

鋼板混凝土複合牆為核能電廠中常見之重要複合材料結構元件，係以兩片鋼板內填充混凝土材料組合而成，鋼板與填充混凝土之間以剪力釘及螺桿作為連接器以傳遞剪力，常配置於核能電廠中作為抗垂直力及側向力系統，現今設計規範AISC N690 (2012)針對鋼板混凝土複合牆提出平面內剪力強度、平面外剪力強度及平面外撓曲強度等設計公式，而無平面內撓曲強度建議公式，惟近來有研究顯示AISC N690之平面內剪力強度估算公式會低估含邊界構材之鋼板混凝土複合牆之剪力強度。
為瞭解含邊界構材之鋼板混凝土複合牆之耐震性能，本研究於國家地震工程研究中心完成四面大尺寸含邊界構材之鋼板混凝土複合牆反覆載重試驗，為包含剪力主控與撓曲主控兩種破壞模式，本試驗試體之高寬比分別為0.75及1.22，並以厚鋼板作為牆體之邊界構材，藉由高寬比及邊界鋼板厚度的調整來達成不同破壞模式。本研究探討不同混凝土強度與高寬比對剪力強度及撓曲強度之影響，並進一步探討既有規範及文獻中剪力強度及撓曲強度建議公式之準確性及適用性。

關鍵字

鋼板混凝土複合牆 ； 邊界構材 ； 高寬比 ； 擬靜態反覆載重試驗 ； 剪力強度 ； 撓曲強度

並列摘要

Steel-plate composite (SC) walls are being used in the third generation of nuclear power plants. SC walls are composed of steel faceplates, connectors and infill concrete, where the connectors are typically constructed from cross-wall tie rods and shear studs welded to the faceplates. The connectors used to transfer shear between faceplate and concrete. The AISC N690s1 provides recommendations for in-plane shear strength, out-of-plane shear strength and out-of-plane flexure strength for steel-plate composite walls, but not for in-plane flexure strength. A recent study concludes that the in-plane shear strength of steel-plate composite walls with boundary elements was underestimated in AISC N690.
The behavior of four SC walls with boundary elements subjected to cyclic in-plane loading is summarized in this study. The experiment was executed in the laboratory of National Center for Research on Earthquake Engineering (NCREE) in Taiwan. Thick steel plates were used as boundary elements of the four specimens. The specimens were designed to study two kinds of failure modes, including 1) shear critical walls with an aspect ratio of 0.75 and a thickness of 3 cm for boundary elements; and 2) flexure critical walls with an aspect ratio of 1.22 and a thickness of 2 cm for boundary elements. The test results were compared with the recommendations of AISC N690s1 and selected literatures. The impact of wall aspect ratio, concrete compressive strength and wall thickness on the in-plane shear strength and in-plane flexure strength of SC walls with boundary elements were discussed.

並列關鍵字

steel-plate composite wall ； boundary element ； aspect ratio ； cyclic loading ； shear strength ； flexure strength

參考文獻

ACI 318 (2014), “Building Code Requirements for Structural Concrete and Commentary” American Concrete Institute, Farmington Hills, MI.

Epackachi, S., Whittaker, A. S., and Huang, Y. N. (2015). "Analytical modeling of rectangular SC wall panels." Journal of Constructional Steel Research, 105, 49-59.

Funakoshi, A., Akita, S., Matsumoto, H., Hara, K., Matsuo, I., and Hayashi, N. (1998). "Experimental study on a concrete filled steel structure Part. 7 Bending Shear Tests." Summaries of Technical Papers of Annual MeetingArchitectural Institute of Japan, pp. 1063-1064.

Kurt, E. G., Varma, A. H., Epackachi, S., and Whittaker, A. S. "Rectangular SC Wall Piers: Summary of Seismic Behavior and Design." Proc., Structures Congress 2015, ASCE, 1042-1051.

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