Welcome to Applied Element Method.comA dedicated resource for engineers, students, scientists, and researchers about the advancements inherent in the Applied Element Method (AEM) fully nonlinear 3-D dynamic numerical analysis.
The Applied Element Method (AEM) of numerical analysis. AEM, is a new method of analysis combines traits of both the Finite Element Method (FEM) and the Discrete Element Method (DEM). Simply said, while FEM can be accurate until element separation and DEM can be used while elements are separated, AEM is capable of automatically simulating through separation of elements to collapse and debris prediction. With more than two decades of continuous research and development AEM has been proven to be the only method that can track structural collapse behavior passing through all stages of loading; elastic, crack initiation and propagation in tension-weak materials, reinforcement yielding, element separation, element collision (contact), and collision with the ground and adjacent structures.
Evaluation of the Seismic Retrofitting of an Unreinforced Masonry building using Numerical Modeling and Ambient Vibration Measurements
Ambient vibration measurements and 3-D nonlinear time-history numerical modeling are used to assess the retrofitting measures conducted in a 6-story unreinforced masonry building (URM) built in the end of the 19th century in Switzerland. Retrofitting measures were taken in order to improve the soundproofing and possibly the seismic performance of the building. Reinforced concrete (RC) footings were added under the walls and horizontal steel beams were added to link the walls together with a RC slab at each floor, though the wooden beams were left in place. Several ambient vibration recordings were performed before, during and after the retrofitting work in order to monitor the evolution of the dynamic behavior of the structure. Moreover, numerical models representing the state of the building before and after the retrofit work have been developed to perform nonlinear dynamic analyses using various ground motion records.read more
Simulation of the Dynamic Response of Steel Moment Frames following Sudden Column Loss. Experimental Calibration of the Numerical Model and Application
Significant research effort has been devoted in recent years to the evaluation of the capacity of steel frame structures to resist progressive collapse after sudden column loss. Due to the complex load-structure interaction and material behaviour, it can be very difficult to evaluate the ultimate capacity of structural components using current analytical methods. Therefore considerable research effort has been directed to experimental testing and sophisticated numerical simulations. Although sudden column loss is a dynamic process, most experimental studies on fullscale or scaled down specimens were performed under quasi-static loads. This paper presents the results of a study devoted to the evaluation of steel frame response following the loss of a column. Advanced numerical models are calibrated using experimental test results and dynamic increase factors are studied. Several full-scale structures are investigated for a sudden column loss scenario.read more
new methodology to design against disproportionate collapse is proposed for critical building that must be operational after a terrorist attack. The disproportionate collapse analysis uses the alternate...read more
lternative Load Path Analysis (ALPA) is becoming the most common technique for performance based design of structures to resist disproportionate collapse. This has coincided with an increased ability of high...read more
Current research with respect to the protection of civilian infrastructure against complex blast loading conditions is primarily focused towards the effect of external explosive sources. As a consequence, the general literature on internal building detonations and specifically in the context of protective design and assessment of structures against these loading conditions is incomplete. Existing guidelines developed for comparatively noncomplex external explosive blast remain unconservative when applied to internal building detonations due to blast wave confinement and complex interaction with structural components. In particular, reinforced concrete (RC) columns in internal blast environments are subjected to time-variant uplift forces coupled with lateral pressures leading to destabilisation and a critical loss of structural integrity. Research presented in this thesis provides an original understanding towards: (i) – the influence of transient uplift forces on the vulnerability of RC columns subject to lateral blast pressures and, (ii) – design and assessment of RC columns against the effect of time-variant coupled uplift and lateral blast pressures due to internal building detonations.read more
nderstanding masonry wall behavior under lateral cyclic loads is important as it helps both evaluating the seismic vulnerability of existing buildings and developing proper retrofitting measures. In this...read more
Voronoi Applied Element Method for Structural Analysis: Theory and Application for Linear and Non-linear Materials
Voronoi Applied Element Method (VAEM) has been developed based on previous Appleid Element Method (AEM). Comparing to the original AEM, the advantage of VAEM can be described as the followings: the boundary...read more
errorist acts of the past two decades have resulted in major changes in approaches further military actions, while having consequences for all areas of social life. Many of terrorist attacks targeted or...read more
s time advances structures in Portuguese built areas start to show high levels of degradation. This suggests that when rehabilitation is no longer a viable option these structures need to be demolished. The...read more