Publications

Confinement effect of FRP and transverse steel on retrofitting square concrete columns

Predicting Stress and Strain of FRP-Confined Square/Rectangular Columns Using Artificial Neural Networks

This study proposes the use of artificial neural networks (ANNs) to calculate the compressive strength and strain of fiber reinforced polymer (FRP)–confined square/rectangular columns. Modeling results have shown that the two proposed ANN models fit the testing data very well. Specifically, the average absolute errors of the two proposed models are less than 5%. The ANNs were trained, validated, and tested on two databases. The first database contains the experimental compressive strength results of 104 FRP confined rectangular concrete columns. The second database consists of the experimental compressive strain of 69 FRP confined square concrete columns. Furthermore, this study proposes a new potential approach to generate a user-friendly equation from a trained ANN model. The proposed equations estimate the compressive strength/strain with small error. As such, the equations could be easily used in engineering design instead of the invisible processes inside the ANN.

Comparative behaviour of FRP confined square concrete columns under eccentric loading

Post-cracking behaviour of basalt and macro polypropylene hybrid fibre reinforced concrete with different compressive strengths

Damping properties and dynamic responses of metaconcrete beam structures subjected to transverse loading

Numerical investigation of the behavior of precast concrete segmental columns subjected to vehicle collision

Generative artificial intelligence and optimisation framework for concrete mixture design with low cost and embodied carbon dioxide

Proposed new dry and hybrid concrete joints with GFRP bolts and GFRP reinforcement under cyclic loading: Testing and analysis

Guest Editorial

Model for analytical investigation on meta-lattice truss for low-frequency spatial wave manipulation

Flexural behaviour of light-weight steel fibre reinforced concrete slabs: Testing and prediction model

Dividend smoothing when firms distribute most of their earnings as dividends

Due to its distinctive institutional background, Oman offers a valuable opportunity to investigate the stability of the dividend policy. In Oman, (1) there are no taxes on dividends, (2) firms are highly levered mainly through bank loans, (3) there is a high concentration of stock ownership and (4) there is variability in cash dividend payments. These factors suggest a diminished role of dividend smoothing in Oman. Our results show that Omani financial firms have erratic dividend policies. These results are inconsistent with the predictions suggested by the relatively weak corporate governance, government ownership and dividend signalling.

Stress Wave Mitigation Properties of Dual-meta Panels against Blast Loads

Effects of crumb rubber inclusion on strength, permeability, and acid attack resistance of alkali‐activated concrete incorporating different industrial wastes

Abstract This study examines the suitability of alternate binders and crumb rubber (CR) to produce light weight alkali‐activated concrete (AAC). For this, strength, and durability performance of AAC incorporating CR by partially replacing fine aggregate was studied. To produce AAC, four different binders, including fly ash, rice husk ash (RHA), metakaolin, and bottom ash were used. Fine aggregates were substituted with CR at 0%, 10%, 20%, and 30% for each AAC mix (with different binders). Furthermore, the mixes were prepared using 12 M sodium hydroxide (NaOH) solution, and the ratio of sodium silicate (Na 2 SiO 3 ) to NaOH was taken as 2.5. The samples were cured at ambient temperature. Strength and durability properties, including permeability through water absorption and acid attack (hydrochloric acid [HCl] and sulfuric acid [H 2 SO 4 ]), were also checked. Results of this study revealed that the strength decreased with the increase in CR content. Further, this decrease was high at 30% replacement but strength was satisfactory. AAC showed good relationships among compressive, flexural, and split tensile strengths. Similar footprints were observed for permeability results. However, highest water absorption was observed for bottom ash binder (with 30% substitution of CR). Mixes with fly ash and metakaolin binders outperformed the other mixes while comparing the compressive strength of acid exposed samples. Overall, a sustainable and durable light weight AAC can be prepared using 20% CR.

Impact force profiles of steel pipes under drop weight impact

Dynamic crushing characteristics of bio-inspired minimal surface primitive structures

Effect of Grounded Blast Furnace Slag and Rice Husk Ash on Performance of Ultra-High-Performance Concrete (Uhpc) Subjected to Impact Loading

This paper investigates the effect of using alternative cementitious constituents on the compressive performance of Ultra-High-Performance Concrete (UHPC) for both static and dynamic conditions. The grounded blast furnace slag (GBFS) and rice husk ash (RHA) with different portions were used to replace 30% ordinary Portland cement (OPC) of a reference mix (UHPC-R1). Two alternative UHPC mixes including an UHPC mix with 30% GBFS mix (UHPC-AC1) and an UHPC mix with 15% GBFS and 15% RHA mix (UHPC-AC2) were considered. The quasi-static compressive strength and dynamic compressive strength of the proposed UHPC mixes were then determined using a compression testing machine and a Split Hopkinson Pressure Bar, respectively. The results indicated that UHPC-AC1 and UHPC-AC2 yielded a comparable performance compared to the reference mix UHPC-R1. In particular, the static compressive strength of UHPC-AC1 and UHPC-AC2 mixes were found to only be 5% and 10% less than those of the UHPC-R1 mix, respectively. In addition, the study also found that UHPC-AC1 and UHPC-AC2 achieved a similar dynamic compressive strength compared to the UHPC-R1, and the compressive strength of UHPC-AC1 and UHPC-AC2 were not strain rate sensitive. For the environmental aspect, UHPC-AC1 and UHPC-AC2 have a lower embedded CO 2 emission index compared to the reference UHPC-R1.

Effect of the plastic hinge and boundary conditions on the impact behavior of reinforced concrete beams