Structural characteristics of concrete walls for absorbing earthquake energy


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Structural characteristics of concrete walls for absorbing earthquake energy

Keiichi Inoue1*, Masato Iso1, Yuya Takase2, Takasuke Saito3, Koichiro Ishikawa1

HIGHLIGHTS

  • Vibration control wing walls are proposed in previous studies.
  • Loading tests of wall members were performed by using concrete containing PVA fiber and low yield bars.
  • The basic structural properties were described to develop a wall member with deforming and damping characteristics.
  • The specimen used for the loading test was modeled and FEM analyses were performed.
  • The applicability and the problems of FEM analysis for concrete wall members were discussed.

ABSTRACT

Recently, given the seismic design of buildings and earthquake resistant reinforcement of existing buildings, an important goal involves improving strength and toughness. Sometimes vibration control structures and seismic isolation structures are usually employed, but generally it is desirable to improve seismic performance at low cost. Therefore, it is useful to reduce the deformation of a building due to the stiffness of a member for small and medium earthquake ground motions. Additionally, when a large earthquake motion occurs, it is useful to ensure that the deformation is as low as possible through the energy absorbing capacity of the member and to limit the places where damage occurs. Thus, the concept of a concrete wall member with energy absorption capability was proposed. The purpose of the study is to grasp the fundamental structural properties of walls with an energy absorption capability. A test specimen was prepared using concrete mixed with PVA fiber and steel bars with low yield strength. It was intended to create the wall members with tough type deformability. The structural characteristics of the energy absorbing type wall member are examined by performing a loading experiment. Subsequently, simulation accuracy is verified by performing FEM analysis. The results of the experimental study revealed that it is possible to ensure sufficient performance of wall members with energy absorption capacity. The results of analytical study revealed that a type of simulation regarding load and displacement is possible by FEM analysis even for wall members with toughness and high deformation. In order to improve the accuracy of FEM analysis more, it should be improved so that the ratio of bending deformation and shear deformation of the wall member can be accurately evaluated.

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To cite this article: Inoue K, Iso M, Takase Y, Saito T, Ishikawa K. Structural characteristics of concrete walls for absorbing earthquake energy. Journal of Advanced Civil Engineering Practice and Research 2017;5:17-23.

To link this article: http://ababilpub.com/download/jacepr5-4/