Since the 19th century, portal frames have been used to build industrial buildings because development process is fast, economical, and efficient. This research aims look at cross-section of structural elements in BS 5950-1:2000 spans 15 m 40 using SNI 1726:2019 with modal analysis, including horizontal deflection stress ratio, LRFD ASD methods. Then, structure was revised be safe against earth...

Beam connections with reduced drilled section and slotted web have been presented after the Northridge earthquake (1994). Their new geometrical shapes have been resulted in weakening of beams and subsequently the bette rperformance of connections in the earthquakes. In this research, the advantages of both connections, mentioned above, have been studied in the Slotted Web Drilled Flange (SWDF) ...

Curved damper truss moment frame (CDTMF) system is a novel seismic force-resisting structural which utilizes the curved dampers integrated into semi-rigid to dissipate earthquake input energy. To ensure CDTMF has high performance, state-of art equivalent energy design procedure (EEDP) applied its design. EEDP allows engineers achieve different performance objectives at levels of shaking intensi...

1 Motivation Many large terrestrial structures—towers, bridges, construction scaffolds—are sparse assemblies of rigid bars connected together at structural nodes. This is also true of many in-space structures such as antennae, solar panel supports, and space-station members. A long-term application of truss climbing robots is automated assembly, repair, and inspection of such truss-like structu...

Tensegrity structures are a special class of lightweight truss structures, where all truss elements are axially loaded and tensile truss elements are made of strings. This paper presents the dynamic analysis of a tensegrity structure by comparing a finite element model with an identified model obtained from experimental data. Experimental data is obtained by placing a three stage tensegrity str...

In this paper, a novel approach proposed for structural damage detection from limited number of sensors using extreme learning machine (ELM). As the number of sensors used to measure modal data is normally limited and usually are less than the number of DOFs in the finite element model, the model reduction approach should be used to match with incomplete measured mode shapes. The second-order a...

This paper utilizes recent optimization algorithm called Ant Lion Optimizer (ALO) for optimal design of skeletal structures. The ALO is based on the hunting mechanism of Antlions in nature. The random walk of ants, building traps, entrapment of ants in traps, catching preys, and re-building traps are main steps for this algorithm. The new algorithm is examined by designing three truss and frame...

In this study, the progressive collapse potential of seismically designed steel plate shear wall (SPSW) systems is investigated using the alternate path method, and their performances are compared with those of the conventional special moment frame (SMF) systems. Nonlinear static and dynamic analyses are conducted to follow the progressive collapse of the structures, and their ability of absorb...

This paper uses a PSOPC model based non-destructive damage identification procedure using frequency and modal data. The objective function formulation for the minimization problem is based on the frequency changes. The method is demonstrated by using a cantilever beam, four-bay plane truss and two-bay two-story plane frame with different scenarios. In this study, the modal data are provided nume...