In this paper, seismic behavior of the existing buildings equipped by friction dampers is studied. Seismic performance of6-story, 9-story and 12-story steel buildings with damper and without damper were studied. The finite element modeling technique (SAP2000 Software) is used for analysis. Time History analyzing was done to achieve this purpose. For nonlinear dynamic analysis, the responses of ...

The slotted-hidden-gap (SHG) connection eliminates the need to reinforce slot region of hollow structural sections (HSS) braces concentrically braced frames (CBFs). However, existing design approach for SHG connections is rather empirical and limited by range geometries materials that had previously been tested. A general based on findings a large-scale parametric study presented in this paper,...

This paper presents a preliminary study on the system reliability for the geotechnical design of braced excavations in soft clays. In this system reliability geotechnical analysis, both ultimate limit state (ULS) and serviceability limit state (SLS) are considered. Herein, the ULS failure refers to the basal heave failure, while the SLS failure refers to failures sue to excessive ground-surface...

Using induction heat (IH) treatment to locally transform one half of a steel brace section high-strength as well inducing intentional eccentricity along the length has been experimentally proven increase limited post-yielding stiffness exhibited by conventional braces. This paper develops multi-level seismic design method for intentionally eccentric IH-treated braced frames (IH-FIEB) support th...

Abstract According to the AISC Seismic Provisions for Structural Steel Buildings (AISC341‐16) and EC8, inelastic rotation demand at design story drift is limited 0.08 rad I‐shape shear links in eccentrically braced frames (EBFs). Numerical studies on EBF archetypes show that single‐sided demands can be much higher than limiting value. In addition, these fail due low‐cycle fatigue (LCF) which de...

A critical review of seismic design provisions for concentrically braced frames (CBFs) in both European and North American (i.e. US and Canadian) codes is presented in this paper. Indeed, even though those codes are based on capacity design philosophy, different requirements and different approaches are used to guarantee the hierarchy of resistances between dissipative and non-dissipative eleme...

Response modification factor (R-factor) is one of the seismic design parameters to consider nonlinear performance of building structures during strong earthquake. Relying on this, many seismic design codes led to reduce earthquake loads imposed to the structure. The present paper tries to evaluate the R-factors of conventional concentric braced frames (CBFs) and special moment frames (MRFs) in ...