Results 61 to 70 of about 3,575,092 (242)

Strengthening of Arched Masonry Structures by Additional Reinforcement: Design Approaches and Comparison to Experiments

The Baltic Journal of Road and Bridge Engineering, 2018
The primary aim of this article is to present design approaches for calculating the additional strengthening of masonry arches with the use of the Strut-and-Tie model and applicable standards and their comparison to the experiments.
Martin Zlámal, Petr Štěpánek
doaj   +1 more source

Damage Characteristics and Stress Distribution Law of Overburden Rock in Multiple Mining of Close Coal Seams

Energy Science &Engineering, EarlyView.
This study on close coal seams shows that multi‐seam mining increases the height of the fractured zone from approximately 26 m (single upper‐seam mining) to about 49 m. When the lower seam is mined after the extraction of the upper seam, the heights of both the caved zone and the fractured zone increase by approximately two times.
Xiaoyu Wu, Lei Guo, Zedong Sun, Xiaowei Wu, Nan Zhang   +4 more
wiley   +1 more source

Hysteresis Behavior of RC Beam–Column Joints of Existing Substandard RC Structures Subjected to Seismic Loading–Experimental and Analytical Investigation

Buildings
Four exterior reinforced concrete beam–column joint subassemblages with poor reinforcement details and low-quality materials were constructed and subjected to cyclic lateral deformations under constant axial loading of the columns.
George Kalogeropoulos, Alexander-Dimitrios Tsonos, Pantelis Iakovidis   +2 more
doaj   +1 more source

Effect of long‐term loading and fire temperatures on mechanical properties of concrete

Journal of Civil Engineering and Management, 2005
During a fire, reinforced concrete structures are exposed to high temperatures and subjected to long‐term action of variable and permanent loads.
Bronius Jonaitis, Vytautas Papinigis
doaj   +1 more source

Fracture Development Mechanism of Water‐Isolating Soil Layers During Downward Mining of Shallow‐Buried Coal Seam Groups

Energy Science &Engineering, EarlyView.
This study systematically investigates the fracture development mechanisms of water‐isolating soil layers under the coupled effects of repeated mining and groundwater seepage during the downward mining of shallow‐buried coal seams. The findings provide a theoretical basis for evaluating stratum stability and preventing roof water inrush.
Tao Yang, Shuqi Zhang, Jie Zhang, Haifei Lin, Dong Liu, Hui Liu, Yiming Zhang, Jianping Sun   +7 more
wiley   +1 more source

Evaluation of Calculation Methods used for Estimating the Ultimate Moment Resistance of Bridge Decks Reinforced with FRP Bars

The Baltic Journal of Road and Bridge Engineering, 2016
A statistical research of the calculation methods for calculating ultimate moments of concrete elements reinforced with fibre-reinforced plastic is presented. For this purpose a database of experimental results has been collected.
Tomas Skuturna, Juozas Valivonis
doaj   +1 more source

The Critical Role of Economies of Scale: A Techno‐Economic Assessment of Small‐ Versus Large‐Scale Biogas Upgrading in Rural Tanzania

Energy Science &Engineering, EarlyView.
Small‐scale biogas upgrading can improve methane quality but remains financially unattractive to individual rural households. Community‐scale implementation substantially lowers energy costs, demonstrating that economies of scale are critical to making purified biogas a viable clean‐cooking option in Tanzania.
Emmanuel Nsekela, Louis Macours, Kenneth Dries, Wim Deferme, Nyangi Chacha, Allard C.R. van Riel   +5 more
wiley   +1 more source

The influence of shear span ratio on load capacity of fibre reinforced concrete elements with various steel fibre volumes

Journal of Civil Engineering and Management, 2007
This paper analyses the influence of steel fibre volume and shear span ratio on the strength of fibre reinforced concrete elements in various states of stress.
Remigijus Šalna, Gediminas Marčiukaitis   +1 more
doaj   +1 more source

Finalisation of the European Approach to Assess the Fire Performance of Facades—Brief Information on the Outcome of the Project

Fire and Materials, EarlyView.
ABSTRACT This research was conducted within the framework of project SI2.825082, funded by the European Commission—DG GROW. The project's objective was to finalise a European approach for assessing the fire performance of façades under medium and large fire exposure conditions.
Péter Tóth, Anja Hofmann‐Böllinghaus, Fabien Dumont, Johan Anderson, Johan Sjöström, Mikael Bergius, Roman Chiva, Octavian Lalu   +7 more
wiley   +1 more source

From point clouds to geometry for detailed micro-modelling of masonry structures

, 2018
Over the last few decades significant efforts have been placed on the development of detailed numerical models to predict the mechanical behavior of historical masonry structures. However, an issue faced in the numerical modelling of historic and damaged
Kassotakis N., De Miranda S., Castellazzi G., Mills J., D'Altri A. M., Sarhosis V.   +5 more
core   +1 more source