Results 61 to 70 of about 1,449 (211)

Why theory matters for causal inference? Rethinking endogeneity in entrepreneurship research

Strategic Entrepreneurship Journal, EarlyView.
Abstract Endogeneity in entrepreneurship research is often treated as a statistical complication addressable through advanced econometric tools. This commentary argues that such an approach overlooks a deeper issue: endogeneity is conceptual before it is statistical.
Daniel Tzabbar
wiley   +1 more source

Large‐scale tests of 50‐year‐old prestressed concrete bridge girders

Structural Concrete, EarlyView.
Abstract An experimental investigation has been carried out as part of the BRIDGE|50 research project, focusing on large‐scale loading tests performed on five 50‐year‐old prestressed concrete (PC) girders. The study aimed at evaluating the structural response of five girders retrieved from a viaduct in the urban area of Turin, Italy, subjected to 4 ...
Francesco Tondolo, Pierclaudio Savino, Donato Sabia, Antonino Quattrone, Fabio Biondini, Gianpaolo Rosati, Mattia Anghileri, Bernardino Chiaia   +7 more
wiley   +1 more source

Compressive strength and cost-effectiveness of confined waste plastic bottle brick masonry walls

International Journal of Sustainable Engineering
Uganda faces a substantial housing deficit, and escalating construction costs resulting from unsustainable extraction of construction materials and inadequate management of plastic and sawdust waste. This study evaluates the compressive strength and cost
Emmison Eric Masaba, Micheal Kyakula, Vicent Ssenyondo   +2 more
doaj   +1 more source

Análisis del momento curvatura en vigas principales de hormigón atravesadas por vigas metálicas

Revista de Investigaciones en Energía, Medio Ambiente y Tecnología, 2017
Considerations for the treatment of concrete beams crossed by secondary steel beams is discussed. Even where data are available, they have been used beams of its kind since 2013, especially in the province of Manabí, Ecuador.
Yordy Mieles Bravo, Julio Hernández Caneiro   +1 more
doaj   +1 more source

Thermal Performance Analysis of Concrete Small Hollow Block

IOP Conference Series: Materials Science and Engineering, 2019
Abstract In this paper, the thermal insulation coefficient and thermal inertia index of small hollow concrete blocks with different hole types are calculated by theoretical method and numerical method, and the block structure with the best thermal insulation property and heat-shielding performance is respectively determined.
YE Bi-chao, Hao Zhou
openaire   +1 more source

Structural capacity of precast concrete walls with openings: A parametric study on connection types and reinforcement ratios

Structural Concrete, EarlyView.
Abstract The structural role of precast concrete walls with openings is often overlooked in design practice due to concerns about reduced stiffness, stress concentration, cracking around openings, and potential unexpected failure modes under seismic loading.
Gonçalo Marreneca, Ricardo do Carmo, André Furtado   +2 more
wiley   +1 more source

Sensitivity study on accuracy and relevant parameters in numerical modeling of internal tendon breaks

Structural Concrete, EarlyView.
Abstract This study investigates the numerical modeling of internal tendon breaks in prestressed concrete structures and evaluates the key parameters affecting accuracy. A combined approach is followed, involving global sensitivity analysis via the Elementary Effects Method and subsequent model calibration using experimental data from distributed fiber‐
Aeneas Paul, David Sanio, Peter Mark
wiley   +1 more source

Deformation and strength of grouted sleeve connectors in pre‐fabricated concrete structures: Mechanisms and analytical modeling

Structural Concrete, EarlyView.
Abstract Grouted sleeve connectors (GSCs) are widely used in precast/prefabricated concrete structures. To ensure force transfer, connectors are often overdesigned in length. This practice has an unintended consequence of reducing the plastic deformation capacity of the connection region and hence the displacement ductility of the precast structure as ...
Hongning Ye, Yong Lu
wiley   +1 more source

Research on Composite Strengthening Methods for External Walls of Box-Shaped Bridge Piers Subjected to Peripheral Ice–Water Pressure

Buildings
To address concrete cracking in submerged box-shaped hollow thin-walled piers under static ice and hydrostatic pressure, this study proposes a composite strengthening method employing externally bonded steel plates coupled with concrete infill blocks ...
Xi Li, Yiwei Yu, Jun Ma, Hang Sun
doaj   +1 more source

Vision language models for bridge inspections: A review of applications in image‐based damage documentation

Structural Concrete, EarlyView.
Abstract Automating bridge inspections requires more than detecting individual damage instances. It demands systems capable of describing, contextualizing, and interpreting damage in an inspection‐relevant manner. Conventional computer vision approaches, such as object detection and segmentation, primarily address visual recognition tasks and are ...
Rona Firdes Çelik, Ulas Bagci, Sylvia Kessler   +2 more
wiley   +1 more source