Results 21 to 30 of about 7,983 (169)

Experimental Study on Seismic Performance of Confined Masonry Walls With Window Openings Strengthened by Using Hybrid-Fiber Modified Reactive Powder Concrete

Frontiers in Materials, 2022
Unreinforced masonry structures are vulnerable to seismic action, especially with window openings. Therefore, a strengthening technique needs to be proposed to improve the seismic performance of the confined masonry walls with window openings.
Guo-an Liu, Xin Wang, Xin Wang, Zhe Yang, Lei-yu Wang, Yun-wen Zhou, Guo-bin Chen   +6 more
doaj   +1 more source

Time-Dependent Deformations of Eccentrically Loaded Reinforced Concrete Columns

International Journal of Concrete Structures and Materials, 2018
If reinforced concrete columns and walls in high-rise buildings are subjected to axial load for a sustained duration, long-term lateral deformation (or curvature) as well as axial shortening increase over time due to the creep and shrinkage of concrete ...
Tae-Sung Eom, Chang-Soo Kim, Xin Zhang, Jae-Yo Kim   +3 more
doaj   +1 more source

Effects of Wetting–Drying Cycles on the Macro and Micro Properties of the Cement-Stabilized Soil with Curing Agent

Buildings
Cement-stabilized soil is a commonly used pavement base/bottom base material. Adding a suitable curing agent to cement-stabilized soil can effectively reduce the dosage of cement, meet the strength requirements, and also greatly improve its water ...
Wenjun Hu, Kun Li, Wenhao Yin, Han Zhang, Yi Xue, Yutong Han, Pingyun Liu   +6 more
doaj   +1 more source

Spatiotemporal Forecasting of Seismic Activity Trends Using Wiener Filtering and Artificial Neural Networks

Mathematics
Reliable forecasting of seismic activity trends is essential for regional seismic hazard analysis. Based on earthquake catalogs from 1500 to 2026, this study investigates the spatiotemporal evolution of seismic activity in the North-South Seismic Belt ...
Pengfei Ren, Peijia Li, Xiaoyang Chen, Tingkai Gu, Xiaoyu Song, Cong Wang, Kai Yan   +6 more
doaj   +1 more source

Evolutionary Retrofitting

ACM Transactions on Evolutionary Learning and Optimization
After Learning Evolutionary Retrofitting (AfterLearnER) consists in applying evolutionary optimization to refine fully trained machine learning models by optimizing a set of carefully chosen parameters or hyperparameters of the model, with respect to some actual, exact, and hence possibly non-differentiable error signal, performed on a subset of the ...
Mathurin Videau, Mariia Zameshina, Alessandro Leite, Laurent Najman, Marc Schoenauer, Olivier Teytaud   +5 more
openaire   +2 more sources

Mechanical Properties of Precast Recycled Concrete Thermal Insulation Panels with GFRP Connectors

Buildings
To improve both the composite performance of precast thermal insulation wall panels and the environmental sustainability of the structure, this study employs recycled concrete, and introduces an innovative four-footstool Glass Fiber Reinforced Plastic ...
Xiuling Li, Haodong Sun, Tianxuan Zhang, Tongxing Bu, Haoming Yu, Jiaxin Sun, Hu Feng   +6 more
doaj   +1 more source

Numerical Study of the Performance of Existing Prestressed Cylindrical Concrete Pipes Strengthened with Reinforced Concrete or Carbon-Reinforced Fiber Polymer Jackets—Part B

Fibers, 2022
A popular water pipe system, used in many countries, is one formed by prestressed cylindrical concrete pipes (PCCP). This study used the results of an experimental investigation on ten (10) PCCP samples taken from an existing water pipeline.
Konstantinos Katakalos, Lazaros Melidis, George Manos, Vassilios Soulis   +3 more
doaj   +1 more source

Research on the Performance of Lightweight Prefabricated Concrete Stairs with a Special-Shaped Hollow Landing Slab

Buildings
In order to further improve the technical advantages of lightweight prefabricated concrete stairs, a kind of prefabricated stair system using a special-shaped hollow landing slab was proposed.
Yilin Wang, Dapeng Sheng, Yu Wang
doaj   +1 more source

Study on Eccentric Compression Behavior of Precast Stratified Concrete Composite Column with Inserted Steel Tube

Buildings
In order to improve the technical economy of steel-reinforced concrete structures and to promote the development of prefabricated concrete structures, a new type of partial precast steel-reinforced concrete column (precast stratified concrete composite ...
Yilin Wang, Shikun Ma, Shunyao Wang
doaj   +1 more source

Effect of Molecular Chain Structure on Fracture Mechanical Properties of Aeronautical Polymethyl Methacrylate Using Extended Digital Image Correlation Method

Advances in Materials Science and Engineering, 2016
The main purpose of this work is to investigate the fracture mechanical properties of aeronautical polymethyl methacrylate, which has been treated with directional tensile technology.
Wei Shang, Xiaojing Yang, Xinhua Ji, Zhongxian Liu   +3 more
doaj   +1 more source