Abstract To investigate the effect of nano carbon-fiber-reinforced polymer (nano CFRP) on retrofitting reinforced concrete (RC) structures, this article presented progressive collapse performance two half-scale four-bay RC frames including one control specimen S1 and S2 with CFRP beam ends. The was discussed by comparing crack patterns, failure mode, load–displacement curves, horizontal displac...

One of the main reasons bridge substructure’s collapse is due to vehicular collision its support, specifically columns, and as now, there a lack understanding on inter-relation between columns piles when subjected impact load. As such, major purpose this investigation was study behaviour concrete under (impact load) assess stresses distributed collision. Experimental tests were performed by con...

the collapse of a compression member gives rise to decrease of the load carrying capacity of the member. to perform a nonlinear analysis, in addition to the precritical behavior, the post-critical behavior of the compression member also must be determined. in this study, because of certain advantages of the finite element method, this method has been selected to evaluate the axial load-axial di...

The detection of voltage collapse is essential to avoid possible voltage collapse for the preventive control actions and voltage security assessment. One effective way to know the locations where voltage collapses could be appear is to identify weakest buses in the systems. The weakest bus is the first point where voltage collapses appear in a severe contingency. This paper proposes a technique...

Each tower of the World Trade Center was designed to withstand, as a whole, the horizontal impact of a large commercial aircraft. Why, then, did total collapse occur? Zden ek P. Ba zant, Walter P. Murphy Professor of Civil Engineering and Materials Science at Northwestern University, and Yong Zhou, a graduate research assistant at Northwestern, suggest that the collapse was the dynamic conseque...

Polymer matrix composites can be severely degraded/damaged under thermal loading caused by fire. Fire degradation of fiber composites is a serious concern in large load-bearing structural applications such as ship, piers and bridges. This paper describes results from combined experimental and theoretical studies of compressive failures of polymer-matrix glass-reinforced composites which have un...

The paper presents an analytical formulation of an element removal algorithm based on dynamic equilibrium and the resulting transient change in system kinematics. The algorithm is implemented into an open-source finite element code, is numerically validated using a benchmark problem with simple element removal criteria, and is able to capture the effect of uncertainty in member capacity. Realis...

This paper presents an original interactive analysis method consisting of mathematical calculation based on theoretical mechanics and mechanics of materials, and dynamics simulation for quantifying outrigger reaction forces of a kind of hydraulic mobile crane, aiming to avoid the eventualities during normal operation as far as possible, for example, tipping-over. First, a three dimensional dyna...

Casing collapse is one of the major problems in oil fields, imposing a lot of costs on oil companies. This problem occurs not only at drilling times in some formations but also after the completion and production can lead to many problems. Analysis of the behavior of casing collapse in terms of geo-mechanics and solid mechanics could significantly meet the needs of the oil industry of Iran. In ...

The loading margin to a saddle-node orfold bifurcation is a useful and basic index of proximityto voltage collapse. Sensitivities of the loading margincan be used to select controls to avoid voltage collapse.This paper justifies the use of static power models to com-pute loading margins and their sensitivities. In particular,dynamic load models may be reduced to static e...