Progressive collapse is a chain reaction of failures propagating throughout a portion of the structure disproportionate to the original local failure occurring when a sudden loss of a critical load‐bearing element initiates a structural element failure, eventually resulting in partial or full collapse of the structure. Both General Services Administration (GSA) and United States Department of D...

A series is reported of five patients with acute respiratory failure complicating neuromuscular diseases, three of whom required assisted ventilation. Initially the arterial carbon dioxide tension fell to levels below the normal range in all the patients and this change reflects alveolar hyperventilation which is probably produced by a combination of fear, small airway collapse, and reflex tach...

➥ normal inspiration and expiration. In adults it is about 700 ml (10 ml/kg). Expiratory reserve volume (ERV) is the gas volume additionally exhaled during forced expiration and inspiratory reserve volume (IRV) is that after a forced inspiration. The sum of VT and IRV is the inspiratory capacity (IC). Even after a maximum expiratory effort, some air is left in the lung; no lung region normally ...

The main objective of the paper is to demonstrate the computer simulation and energy absorption of tapered tubes under impact load. The study of the impact load includes axial compression, bending and torsion. In general, one could rely on the use of finite element analysis to determine the energy absorption capacity of the energy absorbers. This tool is helpful and accuracy. The parametric var...

The paper addresses the issue of providing quality of service guarantees in the Internet. After a brief discussion of Internet traac characteristics, we consider the possibility of performing multiplexing with predictable performance for stream and elastic traac using open loop and closed loop control, respectively. Quality of service depends essentially on providing suucient capacity to handle...

Progressive collapse is a condition where local failure of a primary structural component leads to the collapse of neighboring members and the whole structure, consequently. In this paper, the progressive collapse potential of seismically designed steel dual systems with buckling restrained braces is investigated using the alternate path method, and their performances are compared with those of...

Progressive collapse is a situation where local failure of a primary structural component leads to the collapse of adjoining members which, in turn, leads to additional collapse. Hence, the total damage is disproportionate to the original cause. The most common local failure in framed structure is assumed to be column failure. In this paper, a new approach for dynamic column removal in framed s...

In this paper, a novel approach is proposed to investigate the progressive collapse damage of prismatic thin walled metal columns with different regular cross sections, under the action of axial quasi-static and impact loads. The present work mainly focuses on implementation of some important factors which have been neglected in other studies. These factors include the effect of reducing impact...

Considering the vulnerability of double-layer grid space structures to progressive collapse phenomenon, it is necessary to pay special attention to this phenomenon in the design process. Alternate path method is one of the most appropriate and accepted methods for progressive collapse resistant design of structures. Alternate Path Method permits local failure to occur but provides alternate pat...