Re-evaluation of seismic capacity of interior beam-column joints


Bakir P., Boduroglu H.

3rd International Conference on Earthquake Resistant Engineering Structures (ERES), Malaga, Spain, 01 September 2001, vol.9, pp.111-120 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 9
  • City: Malaga
  • Country: Spain
  • Page Numbers: pp.111-120

Abstract

In spite of the fact that a wide variety of tests on joints of both interior and exterior types have been carried out since the 1960 s, there is no unique design philosophy common to different codes in the world. This is possibly due to the different interpretations of tests as well as test specimens with different demands. This study gives the preliminary findings of the investigations on the factors that effect the performance of interior joints under seismic loads. The authors inspected an experimental database by bringing different tests from different countries together. The database consisted of interior joints which are under uniaxial and biaxial seismic loading and specimens subject to vertical and horizontal acceleration. The experimental database includes tests from different countries such as New Zealand, Japan, the United States as well as the United Kingdom. The results of the parametric studies showed that concrete cylinder strength increased the joint shear strength, while the column axial load had no influence on the joint shear strength of cyclically loaded interior beam column connections. The authors also investigated the influence of joint aspect ratio. The results showed that as the joint aspect ratio is increased, the joint shear strength decreases. The authors examined the tests with respect to the countries. As a successful design is characterized by a failure mode in the beam, the authors are in the opinion that the most successful results were achieved by Japanese and New Zealand tests, as most of them failed in the beam. The authors inspection of the influence of stirrups on the joint shear strength showed that neither the stirrups nor the stirrup index influenced the joint shear strength but loading history was more influential in increasing the shear resistance of joints.