Article
Engineering, Civil
Tom Molkens, Barbara Rossi
Summary: The actual design codes for assessing structural reliability in case of fire offer a range of methodologies, from simple design rules to complex performance-based approaches, including the possibility of using probabilistic methods. The authors' study focuses on a force-based method for single-bay portal frames, integrating thermal effects and utilizing probabilistic thermal actions to run numerous simulations for different load levels and fire scenarios. The post-fire behavior of carbon steel single-bay portal frames is also carefully examined.
Article
Construction & Building Technology
Luis Laim, Aldina Santiago, Hugo Caetano, Helder D. Craveiro, Ashkan Shahbazian
Summary: This paper presents a numerical investigation on the performance of gypsum-based mortars enhanced with silica micro and nanoparticles as fire protection materials for steel columns. The study highlights the underestimation of current design rules on the fire resistance of protected steel columns and proposes revisions to the design standards.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Tom Molkens, Katherine A. Cashell, Mikko Malaska, Mika Alanen, Barbara Rossi
Summary: This paper focuses on the post-fire condition of stainless steel elements, showing that they can be reinstated with minimal additional costs in a short time frame. Tensile tests were conducted on samples taken from loaded stainless steel beams previously examined under fire conditions, as well as on virgin coupons exposed to elevated temperatures. The study provides a detailed analysis of the mechanical properties of stainless steel after exposure to fire and proposes safety factors and a reduced reliability index based on economic and social considerations.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Dustin Hassler, Sascha Hothan
Summary: This paper presents real-scale fire tests of intumescent coatings applied to steel tension members, comparing foaming behavior and failure mechanisms, analyzing influences of various parameters on coating performance, and emphasizing the essentiality of mechanically loaded fire tests in accurately assessing the contribution of coatings to fire resistance.
FIRE SAFETY JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Rahul Kallada Janardhan, Saani Shakil, Marko Hassinen, Wei Lu, Jari Puttonen, Simo Hostikka
Summary: The feasibility of using coupled CFD and FE simulations to aid firefighting tactics and structural cooling was investigated. Experimental and simulation results showed that spray cooling can reduce temperatures and halt truss deformation.
Article
Construction & Building Technology
A. Mohammed, S. Afshan
Summary: This paper presents a comprehensive numerical modeling study on the performance and design of stainless steel hollow section beam-column members under axial compressive load and bending moment at elevated temperatures. It proposes new design recommendations, including a new flexural buckling formulation for stainless steel columns and new combined loading interaction factors for axial load and bending moment. The accuracy and reliability of the proposals are demonstrated through numerical comparisons and reliability assessments.
INTERNATIONAL JOURNAL OF STEEL STRUCTURES
(2023)
Article
Construction & Building Technology
B. W. Schafer, R. S. Glauz, H. Chen
Summary: The ASCE Specification for the Design of Cold-Formed Stainless Steel Structural Members has been updated to ASCE 8-22 after significant advancements in research knowledge and design standards. The new version includes improved design expressions and offers multiple design approaches. It provides provisions for slender austenitic, ferritic, and duplex cold-formed stainless steel structural members and their connections, diverging from carbon cold-formed steel and stainless structural steel standards.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Civil
Fanqin Meng, Nandor Mago, Kaveh Andisheh, G. Charles Clifton
Summary: This study evaluates the accuracy and reliability of an advanced structural fire design methodology specific to steel-framed car park buildings through numerical modeling using ABAQUS. The simulation results show that the structural beams generated plastic deformation in two different fire scenarios but did not fail. The structural fire design methodology overestimated the load on the structural components, resulting in a conservative design result.
FIRE SAFETY JOURNAL
(2023)
Article
Engineering, Civil
Chloe Jeanneret, Benjamin Nicoletta, Lucie Robertson, John Gales, Panagiotis Kotsovinos
Summary: This study investigates the impact of fire on prestressed bridge structures, highlighting the possibility that current guidelines may not be conservative enough for long-duration fires, suggesting a reduction of the critical temperature by at least 100°C.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
F. Walport, L. Gardner, D. A. Nethercot
Summary: The proposed method in this study eliminates the need for subsequent individual member checks by directly capturing frame and member level instability effects, plasticity, and local buckling. It improves design accuracy and consistency, particularly for stainless steel structures, and is due to be included in international stainless steel design standards EN 1993-1-4 and AISC 370.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Civil
Edward J. Sippel, Hannah B. Blum
Summary: Cold-formed steel components are commonly used in various structural systems, with open and symmetric cross sections. Structural analysis programs often overlook the non-symmetry of these sections, leading to inaccurate load distribution and deformation predictions. It is crucial to consider non-symmetric section properties when analyzing structural systems to accurately predict internal forces and displacements.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Michael J. Gangi, Brian Y. Lattimer, Scott W. Case
Summary: This paper focuses on demonstrating the scaling laws for wood with combined thermo-structural loading. The study uses dimensional lumber boards at 1/2-scale and ''h-scale to investigate the effects of combined bending and thermal loading. By scaling exposure time based on the updated thermo-structural test scaling laws, the smaller ''h-scale test deflection results predict the behavior of the equivalent larger 1/2-scale tests.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Physical
Pawel Zabojszcza, Urszula Radon
Summary: This paper focuses on the optimization of steel roof framing in commercial pavilions as load-bearing structures. The authors emphasize the importance of considering the uncertainty in design parameters during optimization. The study includes static-strength analysis using geometrically nonlinear relationships and calculation of implicit limit function values using Abaqus software. Reliability analysis and robust optimization are conducted using Numpress Explore software, which interacts with Abaqus software.
Review
Construction & Building Technology
Musab Rabi, Rabee Shamass, K. A. Cashell
Summary: The degradation of reinforced concrete structures due to steel reinforcement corrosion is a global problem. Replacing traditional carbon steel reinforcement with corrosion-resistant stainless steel reinforcement is a viable solution. This paper provides a comprehensive review of stainless steel reinforced concrete, aiming to drive future research and enable easier use by practicing engineers.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Engineering, Civil
Chen Wenwen, Ye Jihong
Summary: By studying the damage characteristics of steel components under fire conditions and the failure modes of steel frame structures, a calculation method for determining the most adverse fire scenario in structural fire resistance design was established.
Article
Energy & Fuels
Zeenat, Zahoor Ahmad, Adnan Maqbool, Muhammad Asif Hussain, Rami Adel Pashameah, Amber Shahzadi, Nosheen Nazar, Shahid Iqbal, Abdullah K. Alanazi, Muhammad Naeem Ashiq, Hala M. Abo-Dief
Summary: This study demonstrates the synthesis of crystalline TMPs with high OER activity for green hydrogen production. The synthesized M12P5@NF electrodes show low onset potentials and high current densities, indicating excellent OER performance and long-term stability. These findings provide new prospects for utilizing water electrolysis to produce green hydrogen fuel.
Article
Engineering, Electrical & Electronic
Rajwali Khan, Sattam Al Otaibi, Abdulrahman. J. J. Babqi, Nasir Rahman, Mohammad Sohail, Rabbim Mixlievich Yusupov, Sherzod Shukhratovich Abdullaev, Alamzeb Khan, Shahid Iqbal, Tommaso Del Rosso, Tahir, Quaid Zaman, Aurangzeb Khan
Summary: The influence of Ce and Co co-doping on the structural, dielectric, and magnetic properties of ZnO nanoparticles was investigated. The addition of Ce and Co improved the crystallinity and maintained the preferred orientation. The dopants had no influence on the morphology of the particles but reduced their size.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Haya A. Abubshait, Muhammad Saad, Shahid Iqbal, Samar A. Abubshait, Ali Bahadur, Muhammad Raheel, Fwzah H. Alshammari, Norah Alwadai, Hamad Alrbyawi, Mohammed A. S. Abourehab, Eslam B. Elkaeed, Muhammad Abdul Qayyum, H. H. Somaily
Summary: In this study, Co-doped ZnO nanoparticles were synthesized using polyvinyl alcohol hydrogel as a platform for the degradation of methyl orange dye. The Co-doped ZnO nanoparticles exhibited excellent photocatalytic activity due to the doping of a low-cost transition metal. The photocatalytic efficiency of the prepared composite was greatly enhanced, and it showed better degradation performance compared to the pure Co-doped ZnO nanoparticles.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Environmental Sciences
Shahid Iqbal, Sajid Rashid Ahmad
Summary: The Hindu Kush Himalayan (HKH) region, housing the world's largest glaciers outside the polar region, is a crucial freshwater source for millions of people downstream. This study employed advanced geospatial techniques to assess the velocity variation of glaciers in the Hunza Basin. By analyzing satellite images, the study successfully computed the surface ice velocity of the glaciers from 2013 to 2020. The results revealed that glacier velocity increases with altitude but decreases at the terminus, with tributary glaciers significantly contributing to the mainstream glacier velocity.
POLISH JOURNAL OF ENVIRONMENTAL STUDIES
(2023)
Article
Multidisciplinary Sciences
Muhammad Atiq, Kiran Fatima, Nasir Ahmed Rajput, Shahbaz Talib Sahi, Akhtar Hameed, Muhammad Usman, Usama Ahmad, Adeel Sultan, Shahid Iqbal, Ahmad Nawaz
Summary: Citrus is an important fruit crop with high antioxidants and vitamin C content. The study found that Xanthium strumarium and Suaeda fruticosa exhibited the strongest inhibitory effect against citrus canker, followed by Salsola baryosma, Citrulus colocynthis, and Abutilon indicum.
Article
Chemistry, Multidisciplinary
Muhammad Amjad, Ayesha Mohyuddin, Mohsin Javed, Ahmad Alhujaily, Shahid Iqbal, Rasmiah S. Almufarij, Wajad Ulfat, Mohammed T. Alotaibi, Sohail Nadeem, Ali Bahadur, Eslam B. Elkaeed, Abrar Ul Hassan
Summary: This study aimed to develop an environmentally friendly method to synthesize silver nanoparticles using vegetable waste extract, which exhibited good antibacterial, photocatalytic, and antifungal properties. The synthesized VWE-AgNPs showed effective inhibition against poultry bacteria Salmonella gallinarum and Salmonella enteritidis, and demonstrated high degradation efficiency for methylene blue and methyl orange under sunlight exposure. It also exhibited strong antifungal activity against Alternata sp. and C. albican.
JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
M. Tariq Qamar, Shahid Iqbal, M. Aslam, Ahmad Alhujaily, Anum Bilal, Komal Rizwan, Hafiz Muhammad Umer Farooq, Tahir Ali Sheikh, Ali Bahadur, Nasser S. Awwad, Hala A. Ibrahium, Rasmiah S. Almufarij, Eslam B. Elkaeed
Summary: In this study, economical indoor white light was used as the illumination source for the photocatalytic removal of organic toxins from contaminated water. CeO2 was doped with Ni, Cu, and Fe to enhance its catalytic activity. Fe-doped CeO2 exhibited the highest photocatalytic activity among all the materials tested. The antifungal properties of the doped CeO2 nanoparticles were also assessed, and Fe-doped CeO2 nanoparticles showed outstanding antifungal properties compared to other doped CeO2 nanoparticles.
FRONTIERS IN CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Misbah Umar, Sana Mansoor, Mohsin Javed, Nadia Hussain, Majed A. A. Bajaber, Shahid Iqbal, Ahmad Alhujaily, Ayesha Mohyuddin, Humayun Ajaz, Abdul Rauf, Ali Bahadur, Foziah F. F. Al-Fawzan, Eslam B. B. Elkaeed
Summary: The dark brown and white crystals of manganese and tin (Mn2Se3Cl2O7 and SnSe3O4Cl) were synthesized by solid-state reaction at 450 C. SEM and EDX analysis were used to study the morphology and elemental composition of the newly synthesized compounds. SEM analysis revealed the particle size range of 0.2-2.5 μm for Mn2Se3Cl2O7 and 2.0-6.0 μm for SnSe3O4Cl. EDX studies confirmed the presence of Mn, Se, O, Cl, and Sn elements. Powdered XRD confirmed the presence of a new phase in these compounds.
FRONTIERS IN MATERIALS
(2023)
Article
Environmental Sciences
Sameerah I. Al-Saeedi, Asfa Areej, Muhammad Tariq Qamar, Ahmad Alhujaily, Shahid Iqbal, Mohammed T. Alotaibi, Muhammad Aslam, Muhammad Abdul Qayyum, Ali Bahadur, Nasser S. Awwad, Yosef Jazaa, Eslam B. Elkaeed
Summary: Metal oxide-based adsorbents have gained popularity in wastewater treatment due to their selectivity, stable structure, and low solubility in aqueous systems. This study focused on the adsorption of methylene blue (MB) using Mn3O4-Bi2O3 adsorbents prepared through a wet-impregnation technique. The adsorption study revealed that 5% Mn3O4-Bi2O3 composite exhibited the highest efficiency in removing 30 ppm MB at 28 degrees C, pH 7, and 250 rpm. The adsorbent's adsorption ability was evaluated using various isotherms and kinetic models, confirming the formation of a monolayer on the surface of the adsorbent through chemisorption. The 5% Mn3O4-Bi2O3 composites also showed excellent antifungal activity compared to Bi2O3 and Mn3O4.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Pharmacology & Pharmacy
Rafaqat Hussain, Wajid Rehman, Shoaib Khan, Fadi Jaber, Fazal Rahim, Mazloom Shah, Yousaf Khan, Shahid Iqbal, Haseena Naz, Imran Khan, Mohammed Issa Alahmdi, Nasser S. Awwad, Hala A. Ibrahium
Summary: This study investigated the impact of structural changes on the inhibition of thymidine phosphorylase and synthesized a series of analogs with moderate to good inhibitory activity. Some of these analogs were more effective than the standard drug. SAR studies and molecular docking revealed the interactions between the analogs and the enzyme.
SAUDI PHARMACEUTICAL JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Shoaib Khan, Shahid Iqbal, Wajid Rehman, Nadia Hussain, Rafaqat Hussain, Mazloom Shah, Farhan Ali, Ahmed M. Fouda, Yousaf Khan, Ayed A. Dera, Mohammed Issa Alahmdi, Ali Bahadur, Hanan A. Al-ghulikah, Eslam B. Elkaeed
Summary: Different synthetic methods have been developed recently to investigate the biological significances of bis-benzimidazole analogs. This study aimed to synthesize a new series of bis-benzimidazole analogs using a fast and efficient method. Spectroscopic techniques were used to confirm the synthesized scaffolds, and molecular docking was performed to analyze the binding interactions. The derivatives were evaluated for their inhibitory activity against α-amylase and α-glucosidase through SAR study. Compound 9 exhibited excellent activity compared to the referenced drug acarbose.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Tanzeela Fazal, Bibi Nazia Murtaza, Mazloom Shah, Shahid Iqbal, Mujaddad-Ur Rehman, Fadi Jaber, Ayed A. Dera, Nasser S. Awwad, Hala A. Ibrahium
Summary: Targeted delivery of drug molecules to diseased sites using biopolymer-based drug delivery systems (DDS) is an effective approach to achieve good therapeutic results and minimize toxicity to healthy cells. Biopolymers, such as cellulose chitosan, starch, silk fibroins, collagen, albumin, gelatin, alginate, agar, proteins, and peptides, have shown potential applications in DDS due to their biodegradability, compatibility, non-toxicity, non-immunogenicity, and high drug loading ratio. Various synthetic techniques and formulations have been reported for designing and fabricating DDS for different delivery systems.
Article
Engineering, Chemical
Yu Shuang Ren, Hizbullah Khan, Bushra Khan, Muhammad Ilyas, Shahid Iqbal
Summary: The adsorption of aluminum (Al3+) from aqueous solutions using eucalyptus wood waste-derived biochar (EWB) was studied. The EWB morphology and structure were analyzed. Variables influencing adsorption performance were analyzed. The EWB showed high adsorption capacity for Al3+ due to its porous structure and high adsorption rate in low concentration solutions.
DESALINATION AND WATER TREATMENT
(2023)
Article
Chemistry, Multidisciplinary
Qasar Saleem, Sammia Shahid, Abdur Rahim, Majed A. A. Bajaber, Sana Mansoor, Mohsin Javed, Shahid Iqbal, Ali Bahadur, Samar O. O. Aljazzar, Rami Adel Pashameah, Samah A. A. AlSubhi, Eman Alzahrani, Abd-ElAziem Farouk
Summary: A highly specific, selective, and sensitive electrochemical biosensor based on a copper-polypyrrole composite and a glassy carbon electrode has been developed for catechol detection. The novelty of this biosensor was tested using electrochemical techniques, and its characteristics of sensitivity, LOD, LOQ, linear range, specificity, interference, and real sample detection were investigated. The morphological, structural, and bonding characteristics of the biosensor were examined using XRD, Raman, FTIR, and SEM.
Article
Materials Science, Multidisciplinary
Tanzeela Fazal, Shahid Iqbal, Mujaddad-ur Rehman, Azam Hayat, Mazloom Shah, Sajid Mahmood, Khurram Shoaib, Ahmad Alhujaily, Bibi Nazia Murtaza, Sedra tul Muntaha, Randa A. Althobiti, Eman Alzahrani, Abd-ElAziem Farouk, Foziah F. Al-Fawzan, Eslam B. Elkaeed
Summary: Biological production of nanomaterials is an environmentally friendly and stable approach. In this study, silver iron oxide nanoparticles were synthesized using Escherichia coli bacterium, showing antimicrobial and photocatalytic degradation properties, as well as hydrogen generation potential.
MATERIALS CHEMISTRY AND PHYSICS
(2024)