Abstract: An examination was conducted on a residential building in Egypt consisting of 15 stories to assess its ability to withstand lateral loads. The analysis was then repeated for the same building, but with an increased number of stories, reaching a total of 30 stories. Two different lateral load resisting systems, namely outriggers and bracing systems, were used in the study. The analysis of all the buildings was performed using the ETABS 2015 program, according to the Egyptian, European, and American codes. High-rise buildings in Egypt commonly range from 15 to 30 stories. Consequently, a linear analysis was conducted on the 30-storey building using the Egyptian, European, and American codes, but in a different region and soil type compared to the initial study. The findings indicate that the Egyptian code yields higher values for base shear, maximum displacement, and total weight of the building compared to European and American codes. Furthermore, the lateral load resisting system experienced a significant increase when the building was relocated from a seismic region to a higher seismic region.

Keywords: Earthquakes, seismic analysis, Outer Bracing, High rise buildings, Outrigger and Belts system.

Title: Seismic Analysis of High Rise Buildings Using Different Codes

Author: Ramy Mohammed Abdelrahman Aly Aggag, Prof. Dr. Mohamed Basil Emara, Dr. Mohamed Amr Salama

International Journal of Novel Research in Civil Structural and Earth Sciences

ISSN 2394-7357

Vol. 10, Issue 3, September 2023 - December 2023

Page No: 36-43

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 04-December-2023

Abstract: Effective crack detection is pivotal for the structural health monitoring and inspection of buildings. This task presents a formidable challenge to computer vision techniques due to the inherently subtle nature of cracks, which often exhibit low-level features that can be easily confounded with background textures, foreign objects, or irregularities in construction. Furthermore, the presence of issues like non-uniform lighting and construction irregularities poses significant hurdles for autonomous crack detection during building inspection and monitoring. Convolutional neural networks (CNNs) have emerged as a promising framework for crack detection, offering high levels of accuracy and precision. Additionally, the ability to adapt pretrained networks through transfer learning provides a valuable tool for users, eliminating the need for an in-depth understanding of algorithm intricacies. Nevertheless, it is imperative to acknowledge the limitations and considerations when deploying CNNs, particularly in contexts where the outcomes carry immense significance, such as crack detection in buildings. In this paper, our approach to surface crack detection involves the utilization of various deep learning models. Specifically, we employ fine-tuning techniques on pre-trained deep learning architectures: VGG19, ResNet50, Inception V3, and EfficientNetV2. These models are chosen for their established performance and versatility in image analysis tasks. We compare deep learning models using precision, recall, and F1 score.

Keywords: Crack detection, Deep learning, Transfer learning.

Title: Concrete Surface Crack Detection with Convolutional-based Deep Learning Models

Author: Sara Shomal Zadeh, Sina Aalipour birgani, Meisam Khorshidi, Farhad Kooban

International Journal of Novel Research in Civil Structural and Earth Sciences

ISSN 2394-7357

Vol. 10, Issue 3, September 2023 - December 2023

Page No: 25-35

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 01-November-2023

Abstract: Tensile behaviors of Al-12wt%-2wt%Mg based biocomposites containing different concentrations of periwinkle shell and Mangifera indica particulates (PSp and MIp) have been explored experimentally. The effects of hybrid concentrations on the tensile behaviors were also investigated. The structural analysis of the developed biocomposites was done using scanning electron microscopy (SEM). The biocomposites demonstrated excellent tensile behaviors at different concentrations of the reinforcements with maximum ultimate tensile strength of 233 MPa obtained by Al-12wt%-2wt%Mg-6PSp-2wt%MIp biocomposite. The biocomposite recorded higher strength than the alloy matrix. The improvements of mechanical properties are guaranteed by the distribution of PSp and MIp particles in the alloy matrix as evidenced in the microstructural analysis.

Keywords: Aluminum Alloy, Periwinkle shell. Mangifera Indica Particulate, Tensile behaviors.

Title: Tensile Behaviors of Al-Si-Mg Alloy Reinforced with Periwinkle Shell and Mangifera Indica Particulates

Author: Chibuzo N. Okoye, Paul C. Okolie, Onyemazuwa A. Azaka, Chidume N. Nwambu

International Journal of Novel Research in Civil Structural and Earth Sciences

ISSN 2394-7357

Vol. 10, Issue 3, September 2023 - December 2023

Page No: 15-24

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 22-September-2023

Abstract: The primary objective of this research is to investigate the potential of IWSp as reinforcement in Al-2Nb-0.5Si eco-composites. The study aims to assess various mechanical properties and microstructural characteristics to determine the effectiveness of IWSp as a reinforcing material. The Al-2Nb-0.5Si eco-composites were fabricated using the stir-casting technique. This process involves mixing the aluminum matrix with varying percentages of IWSp (1%, 3%, 5%, and 7% by weight) to create composite samples for testing. The microstructure of the developed composites was examined using an optical microscope (OM). The results indicate that the IWSp were evenly dispersed in the aluminium matrix. This even dispersion is crucial for enhancing the properties of the composites. The addition of IWSp led to an increase in the ultimate tensile strength of the Al-2Nb-0.5Si matrix, with a maximum value of 174 MPa achieved. The hardness of the composites also increased with the inclusion of IWSp, reaching a maximum value of 288 HV. The impact energy of the composites improved, reaching a maximum of 49.1 J. However, there was a sudden decrease in impact energy when IWSp was incorporated above 1wt%. The alloy matrix exhibited a better percentage elongation value compared to the composite samples, with a maximum value of 42%. The study concludes that IWSp has the potential to serve as an alternative reinforcing material for Al-2Nb-0.5Si eco-composites.

Keywords: Al-2Nb-0.5Si alloy; eco-composites; microstructure; strength; hardness.

Title: Reinforcing potential of Irvingia wombolu shell particulates in Al-2Nb-0.5Si eco-composite

Author: Kingsley C. Nnakwo, Jerome U. Odo, Agatha I. Ijomah

International Journal of Novel Research in Civil Structural and Earth Sciences

ISSN 2394-7357

Vol. 10, Issue 3, September 2023 - December 2023

Page No: 8-14

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 14-September-2023

Abstract: Irvingia wombolu shell particulates are not commonly used as reinforcing materials in aluminium composites, which makes this research novel and interesting. Investigating their potential as reinforcement can offer new insights into sustainable and cost-effective composite materials. In this experimental study, the microstructure, tensile strength, hardness, and impact energy of Irvingia wombolu reinforced Al-4wt%Cu composites were investigated. The Al-4wt%Cu composites containing 2, 5, 8, 11, and 14wt% IWSp were fabricated using the stir-casting technique. The microstructure of the developed composites was analyzed using optical microscope. The OM results revealed even dispersion of IWSp in the Al matrix, leading to increase in the ultimate tensile strength, hardness, and impact energy of the Al-4wt%Cu matrix, with maximum values of 152 MPa, 257 HV, and 58 J obtained at 8wt%, 14wt%, and 5wt% IWSp, respectively. Incorporation of IWSp above 8wt% led to a sudden decrease in ultimate tensile strength due to excess of hard IWSp in the Al matrix. The alloy matrix recorded a better percentage elongation value compared with the composite samples. The study concludes that IWSp has the potential to serve as an alternative reinforcing material for Al-4wt%Cu composites.

Keywords: Al-Cu; microstructure; impact energy; strength; Irvingia wombolu.

Title: Mechanical characteristics of stir-cast Irvingia wombolu reinforced Al-4wt%Cu composite

Author: Kingsley C. Nnakwo, Jerome U. Odo, Agatha I. Ijomah

International Journal of Novel Research in Civil Structural and Earth Sciences

ISSN 2394-7357

Vol. 10, Issue 3, September 2023 - December 2023

Page No: 1-7

Novelty Journals

Website: www.noveltyjournals.com

Published Date: 14-September-2023