Failure Analysis of a Concrete Anchor under Severe Seismic Action

Applied Sciences

Inkyu Rhee¹  Jae-Min Kim¹  Nakhyun Chun² 

[1] Department of Civil Engineering, Chonnam National University, Gwangju 61186, Korea;Next Generation Transmission & Substation Laboratory, Korea Electric Power Research Institute, Daejeon 34056, Korea;

关键词: anchoring to concrete;    response modification factor;    overstrength factor;    elastic design;    ductile design;   

DOI  :  10.3390/app112110019

来源: DOAJ

【 摘 要 】

We explored the usage of a response modification factor and overstrength factor for analyzing brittle or ductile failure of anchor system. Parametric studies on the tension and shear behaviors of anchor systems were compared in terms of elastic and ductile design using tuned Gyeongju earthquake data (ca. 0.3 g). We evaluated the yields of concrete anchors in terms of ductile failure and reviewed the various anchors, anchor attachments, and facilities and equipment that ensure anchor safety and functionality. The pseudo-static pushover test and elastic/inelastic dynamic tests revealed that a ductile design reduces the seismic demand relatively efficiently. As the DS-0050 design standards are based on strength design, no displacement limit for non-structural facilities/equipment is imposed. Despite the advantages of ductile design, large displacements of equipment or facilities during seismic action can cause permanent deformation and fall-out of major compartments; also, rapid functional recovery may be difficult. Thus, displacement limits for non-structural equipment or facilities should be included in the design code.

【 授权许可】

Unknown