Experimental evaluation of physical and mechanical properties of Glued Laminated Guadua angustifolia Kunth
Abstract
A comprehensive study was conducted in order to determine selected physical and mechanical properties of Glued Laminated Guadua angustifolia Kunth, providing a proper characterization which, in turn, represents a technical framework for structural design values. Experimental tests were performed to determine properties such as density, shrinkage-in-volume, compression (parallel- and perpendicular-to-grain), tension (parallel- and perpendicular-to-grain), shear-parallel-to-grain, and static bending, among others........
Three-dimensional modal pushover analysis of buildings subjected to two components of ground motion, including its evaluation for tall buildings
Abstract
The modal pushover analysis (MPA) procedure, presently restricted to one horizontal component of ground motion, is extended to three-dimensional analysis of buildings—symmetric or unsymmetric in plan—subjected to two horizontal components of ground motion, simultaneously. Also presented is a variant of this method, called the practical modal pushover analysis (PMPA) procedure, which estimates seismic demands directly from the earthquake response (or design) spectrum.....
Estudios de vulnerabilidad sísmica, rehabilitación y refuerzo de casas en adobe y tapia pisada
Abstract
Approximately one fifth of the world's population and some 35 million people in South America inhabit adobe and rammed earth constructions. These buildings have demonstrated poor seismic behavior in earthquakes occurred over the last 50 years all around the world generating thousands of casualties. In addition, in Colombia a large number of historic and cultural earth built constructions are located on high seismicity zones. ....
Influence Of Age And Height Position On Colombian Guadua Angustifolia Bamboo Mechanical Properties
Abstract
The age of bamboo is a key factor that affects its mechanical properties. Bamboo Guadua angustifolia kunt (Guadua a.k.) has been used as a construction material in America, but the influence of the age and height position of the culm on the mechanical properties has not been studied in detail. In this study, selected mechanical properties of Guadua a.k from 2 to 5 year old culms, located at different heights, were investigated using international standard test procedures (ISO 22157).....
How Many Records Should be used in an ASCE/SEI-7 Ground Motion Scaling Procedure?
Abstract
U.S. national building codes refer to the ASCE/SEI-7 provisions for selecting and scaling ground motions for use in nonlinear response history analysis of structures. Because the limiting values for the number of records in the ASCE/SEI-7 are based on engineering experience, this study examines the required number of records statistically, such that the scaled records provide accurate, efficient, and consistent estimates of “true” structural responses.....
Free vibration response of two-dimensional magneto-electro-elastic laminated plates
Abstract
An approximate solution for the free vibration problem of two-dimensional magneto-electro-elastic laminates is presented to determine their fundamental behavior. The laminates are composed of linear homogeneous elastic, piezoelectric, or magnetostrictive layers with perfect bonding between each interface. The solution for the elastic displacements, electric potential, and magnetic potential is obtained by combining a discrete layer approach with the Ritz method....
Assessment of fire reaction and fire resistance of Guadua angustifolia kunth bamboo
Abstract
The main challenge for construction industry today is sustainability. Bamboo has properties that make it sustainable, but its fire behavior remains unknown. This paper presents an exploratory research on fire behavior of Guadua angustifolia kunth (a.k.) bamboo. Fire reaction was assessed through critical heat flux for ignition and flame spread while fire resistance through charring rate and strength variation with temperature...
Static analysis of functionally graded elastic anisotropic plates using a discrete layer approach
Abstract
An approximate solution for the static analysis of three-dimensional, anisotropic, elastic plates composed of functionally graded materials (FGM) is presented. The solution is obtained by using a discrete layer theory in combination with the Ritz method in which the plate is divided into an arbitrary number of homogeneous and/or FGM layers. Two types of functionally graded materials are considered: an exponential variation of the mechanical properties through the thickness of the plate, and mechanical properties as a function of the fiber orientation, which varies quadratically through the laminate thickness....
Discrete Layer Solution to Free Vibrations of Functionally Graded Magneto-Electro-Elastic Plates
Abstract
Natural frequencies of orthotropic magneto-electro-elastic graded composite plates are determined using a discrete layer model with two different approaches. In the first, the functions describing the gradation of the materials properties through the thickness of the plate are incorporated into the governing equations. In the second approach, the plate is divided into a finite number of homogeneous layers. The model is validated by comparing the natural frequencies of a simply supported Al/ZrO2 graded square plate with the exact solution....
