A case study of retrofitting a 20-story pre-Northridge steel moment-frame building is presented. Twelve retrofit 4 schemes are developed with varying degrees of intervention. Three retrofitting techniques are considered: up5 grading the brittle beam-to-column moment resisting connections, and implementing either conventional or 6 buckling-restrained brace elements within the existing moment-fra...

Researches show that the strength criterion is inadequate for design of structures against seismic loads. Since structures yield and experience plastic deformation under strong ground motion, considering structural damage with inelastic behavior may be a considerable criterion for design and control of the structures.In this paper, three steel structures with dual system consisting of intermedi...

The Klandasan Parking Building (GPK) is an 8-story parking built in Balikpapan that serves as vehicle and uses a conventional structure system (columns, beams, plates) where the highest beam about 800 mm. To maximize clearance of each story, alternative planned by removing beams called flat slabs. new plan conducted modifying into dual which consists Intermediate Moment Resisting Frame, plate w...

One of the most important problems discussed recently in structural engineering is the structural reliability analysis considering uncertainties. To have an efficient optimization process for designing a safe structure, firstly it is required to study the effects of uncertainties on the seismic performance of structure and then incorporate these effects on the optimization process. In this stud...

In recent years, it is considerably attempted to develop the concept of energy dissipation as an applicable technology to overcome the energy released by earthquakes. The passive control systems such as metallic dampers have been widely considered. The dampers are basically used to mitigate the structural responses and reduce the damages in main structural elements by energy dissipation. ...

Nowadays, many buildings with steel Moment Resisting Frames (MRF) are built in seismic zones when seismic codes are at its early stages of development, and as such, these structures are often designed solely to resist lateral wind loads without providing an overall ductile mechanism. On the other hand, current seismic design criteria based on hierarchy of resistance allow enhancing the structur...

According to current design practices of steel moment-resisting frames, formation plastic hinges is unavoidable when the frames are supported by conventional column base systems, i.e., exposed-type and embedded-type due unequalized flexural moment demand on top first story columns [1]. Kimura et.al [3] has proposed mid-story pin system avoid from yielding realize beam-yielding mechanism applyin...

Mid-story pin column system has been proposed to realize beam yielding mechanism of a steel moment-resisting frame. In this system, connection is applied inbetween the upper and lower RC extended from base control moment demands on both ends first story column. An exposed-type adopted as connected by single anchor bolt. Static cyclic horizontal loading tests partial frame consisting second floo...

This research aims to investigate the extent that an incorrect assumption for soil type may endanger seismic safety of moment-resisting steel frame structures using probabilistic assessment. To this aim, first, a set were designed site class C. The examined 3-, 6-, and 9-storey frames according ASCE7-16. Then, assuming actual had been B, C, or D, vulnerability assessments performed OpenSees sof...

Numerous studies were contemplated on the structures with distinctive structural configuration and ample amount of work is currently being performed through investigation response individual behavior shear walls bracings by varying configurations their material properties. Seismic design philosophies had mentioned firmly that a structure must accomplish Life Safety Performance Level for both re...