This research paper describes an SEE （Structural Engineering Encounter） Lab project. The paper reports on the development of a single-story, single-bay portal frame model as part of the AIMS2 （attract, inspire, men...This research paper describes an SEE （Structural Engineering Encounter） Lab project. The paper reports on the development of a single-story, single-bay portal frame model as part of the AIMS2 （attract, inspire, mentor and support students） grant supported through the US DOE （Department of Education） summer research program at California State University, Northridge. This research effort is part of a comprehensive program to develop laboratory models of structures commonly encountered in civil engineering practice, which can serve the dual purpose of accomplishing engineering education and research in the areas of structural and earthquake engineering. The objective of the present study was to construct a physical model of the aforementioned frame to experimentally collect data due to the application of vertical and lateral loadings through instrumentation such as strain gages and an LVDT （linear variable differential transformer） displacement transducer, and also to make comparisons with theoretical and numerical predictions.展开更多
Though the turn to the right in Latin America will continue over the short term, the left has not diminished and its resurgence remains possible. The political situation in Latin America has undergone dramatic changes...Though the turn to the right in Latin America will continue over the short term, the left has not diminished and its resurgence remains possible. The political situation in Latin America has undergone dramatic changes since 2015, when an ebbing of the"pink tide"and rise of the right in several countries occurred, coupled with US support to the right.Flexible political strategies and rightists' political pragmatism are occurring as the continent's middle class expands, coupled with US support to the right. Some conditions that promote the right's revival remain operative, but for the new right regimes, addressing economic vitality, the wellbeing of the poor, corruption, and divisions from within are imminent challenges against which a left resurgence has competitive ground.展开更多
文摘This research paper describes an SEE （Structural Engineering Encounter） Lab project. The paper reports on the development of a single-story, single-bay portal frame model as part of the AIMS2 （attract, inspire, mentor and support students） grant supported through the US DOE （Department of Education） summer research program at California State University, Northridge. This research effort is part of a comprehensive program to develop laboratory models of structures commonly encountered in civil engineering practice, which can serve the dual purpose of accomplishing engineering education and research in the areas of structural and earthquake engineering. The objective of the present study was to construct a physical model of the aforementioned frame to experimentally collect data due to the application of vertical and lateral loadings through instrumentation such as strain gages and an LVDT （linear variable differential transformer） displacement transducer, and also to make comparisons with theoretical and numerical predictions.
文摘Though the turn to the right in Latin America will continue over the short term, the left has not diminished and its resurgence remains possible. The political situation in Latin America has undergone dramatic changes since 2015, when an ebbing of the"pink tide"and rise of the right in several countries occurred, coupled with US support to the right.Flexible political strategies and rightists' political pragmatism are occurring as the continent's middle class expands, coupled with US support to the right. Some conditions that promote the right's revival remain operative, but for the new right regimes, addressing economic vitality, the wellbeing of the poor, corruption, and divisions from within are imminent challenges against which a left resurgence has competitive ground.
