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RISInterpretation of Flexural Vibration Modes from Impact-Echo Testing
Publisher: American Society of Civil Engineers
Abstract: The main goals of this study are to provide an improved interpretation of flexural vibration modes of delaminations in concrete bridge decks detected using impact-echo testing, and to develop a simple two-dimensional (2D) ...
Effect of Modeling Assumptions on the Earthquake-Induced Losses and Collapse Risk of Steel-Frame Buildings with Special Concentrically Braced Frames
Publisher: American Society of Civil Engineers
Abstract: This paper quantifies the collapse risk and earthquake-induced economic losses of steel-frame buildings with special concentrically braced frames designed in urban California. A probabilistic building-specific loss estimation ...
New Three-Dimensional Damage Index for RC Buildings with Planar Irregularities
Publisher: American Society of Civil Engineers
Abstract: Motivated by the observation that existing damage indices do not take into account the bidirectional and torsional response effects, a new three dimensional damage index is proposed in this paper. The derivation is based ...
Machine Learning-Aided Performance-Based Optimal Design of Steel Moment-Resisting Frames Using NSGA-II
Publisher: American Society of Civil Engineers
Abstract: This paper introduces a novel and rigorous probabilistic methodology for the performance-based design of steel moment-resisting frame buildings. The proposed methodology is consistent with the modern performance-based ...
Determination of Friction Condition by Geometrical Measurement of Backward Extruded Aluminum Alloy Specimen
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The proper determination of friction condition during metal forming operations is imperative for successful process design and production of parts. Through the years, various methods of determining ...
Finite Element Investigation of Friction Condition in a Backward Extrusion of Aluminum Alloy
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Finite element simulations are being widely used to increase the efficiency and effectiveness of design of bulk metal forming processes. In such simulations, proper consideration of friction ...
Stiffness Reduction Factor for Flat Slab Structures under Lateral Loads
Publisher: American Society of Civil Engineers
Abstract: Effective beam width model (EBWM) has been widely used for predicting lateral drifts and slab moments in flat slab structures under lateral loads. As the slab moment due to lateral loads increases, slab stiffness decreases ...
The Effect of Surface Conditions on Friction by Tip Test
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the present investigation, a tip test based on upsetting and backward extrusion was utilized to characterize the effect of surface roughness of the billet and forming tools, and the type ...
Methodology to Improve the AASHTO Subgrade Resilient Modulus Equation for Network-Level Use
Publisher: American Society of Civil Engineers
Abstract: Falling weight deflectometer (FWD) testing is commonly used to estimate subgrade resilient modulus (
Nondestructive Bridge Deck Testing with Air-Coupled Impact-Echo and Infrared Thermography
Publisher: American Society of Civil Engineers
Abstract: Two different nondestructive test (NDT) methods, air-coupled impact-echo (IE) and infrared (IR) thermography are evaluated on a full-scale simulated reinforced concrete bridge deck containing simulated delamination and ...