Direct damage controlled seismic design of plane steel degrading frames

A new method for seismic design of plane steel moment resisting framed structures is developed. This method is able to control damage at all levels of performance in a direct manner. More specifically, the method: (a) can determine damage in any member or the whole of a designed structure under any given seismic load, (b) can dimension a structure for a given seismic load and desired level of damage and (c) can determine the maximum seismic load a designed structure can sustain in order to exhibit a desired level of damage. In order to accomplish these things, an appropriate seismic damage index is used that takes into account the interaction between axial force and bending moment at a section, strength and stiffness degradation as well as low cycle fatigue. Then, damage scales are constructed on the basis of extensive parametric studies involving a large number of frames exhibiting cyclic strength and stiffness degradation and a large number of seismic motions and using the above damage index for damage determination. Some numerical examples are presented to illustrate the proposed method and demonstrate its advantages against other methods of seismic design. © 2014, Springer Science+Business Media Dordrecht

Public health, conflict and human rights: toward a collaborative research agenda

Although epidemiology is increasingly contributing to policy debates on issues of conflict and human rights, its potential is still underutilized. As a result, this article calls for greater collaboration between public health researchers, conflict analysts and human rights monitors, with special emphasis on retrospective, population-based surveys. The article surveys relevant recent public health research, explains why collaboration is useful, and outlines possible future research scenarios, including those pertaining to the indirect and long-term consequences of conflict; human rights and security in conflict prone areas; and the link between human rights, conflict, and International Humanitarian Law