This study presents the optimal drift design method to control the elastic and inelastic performance of steel moment frames. This is formulated as a problem that minimizes the lateral displacement at the top of a building satisfying the constraints on the total structural weight and the column-to-beam strength ratios at the joints. This uses the resizing method based on the linear static analys...

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 ...

steel structures are usually built with some defects. according to the standard building codes, the central axes of the bracing members should go through the beam-column joints, however, in most of the braced steel structures, bracing members are unintentionally connected eccentrically. this paper presents a numerical investigation on performance analysis of cbfs (concentrically braced frames) ...

The fundamental periods of buildings are essential to calculate the design base shear and lateral forces. Most seismic codes specify empirical formulae to estimate the fundamental vibration period of buildings. These empirical formulae are used for both lowand mediumrise buildings. These formulae depend on the building materials (steel, reinforced concrete etc), building types (frame, shear wal...

Citation: Nakamura N, Kinoshita T and Fukuyama H (2017) Response Analysis and Auto-Regressive Exogenous Modeling of a SteelReinforced Concrete High-Rise Building during the 2011 Off the Pacific Coast of Tohoku Earthquake. Front. Built Environ. 3:74. doi: 10.3389/fbuil.2017.00074 response analysis and autoregressive exogenous Modeling of a steel-reinforced concrete high-rise Building during the ...

This study analyses the cost structure of the several processes associated with the shipbuilding industry. The analysed productive processes are: the cutting preparation procedures; the several steel plate cutting processes; the processes of hull plates and stiffeners forming; the associated transport and assembling of plates and profiles; and finally the welding processes. The paper includes 2...

Substantial amounts of post-consumer scrap are exported to other regions or lost during recovery and remelting, and both export and losses pose a constraint to desires for having regionally closed material cycles. To quantify the challenges and trade-offs associated with closed-loop metal recycling, we looked at the material cycles from the perspective of a single material unit and trace a unit...

Semi-rigid design represents, by its intrinsic nature, a new option aimed at improving the competitiveness of steel construction. This objective can be achieved via Knowledge-Based approaches. In the perspective of design automation, our research proposes a novel methodology for the detailed analysis of a braced building frame adopting semi-rigid steel joints. A software tool was developed in o...