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Recently, the repairing of reinforced concrete (RC) structures attracted great research attentions, but the research interests were mainly concentrated on common repairing types. To this end, in this paper, a repairing of pre-loaded RC beams strengthened by aramid reinforcement polymers (AFRP) is presented. Furthermore, the purpose of this paper is to study the behavior of pre-loaded RC Deep beams under sustained load. The AFRP has many advantages such as controlling stresses distribution around the openings, controlling failure modes, and enhancing the structural capacity of pre-cracked RC beams.

Four specimens were experimentally tested: one specimen without strengthening, which is considered as control specimen, one strengthened specimen using AFRP without pre-cracking and two specimens subjected to pre-cracking load before prior to AFRP application. Furthermore, after validation of experimental data by using ANSYS software, a parametric study was conducted to investigate the effect of pre-damage level on shear capacity of RC beams. For pre-cracked beams, loading was first applied until the cracking stage, followed by specimen repairing with epoxy injection, and then the specimens were loaded again until failure point.

The result showed that pre-damage level and AFRP strengthening have great influence on the ultimate strength and failure mode. In addition, the results obtained from experimental tests were compared with those from numerical validation with ANSYS and showed good agreement.

Based on ACI guidelines, an analytical equation for calculating the shear strength of strengthened RC beams with openings subjected to pre-damage was then proposed, and the calculated results were compared with those from the tests, with differences not exceeding 10%.

This study aims to learn how a three-way interaction moderation model is used to analyse the role of country-specific characteristics, in the form of the implementation of Sharia law and legal origin in a particular country, in the choice of sukuk type.

The firm profitability and firm leverages of sukuk issuer are used as the firm characteristics that can influence the choice of sukuk type between Mudharaba sukuk, Ijara sukuk and Murabaha sukuk. The research sample of 545 global sukuk issuances, obtained from the IIFS database, includes the issuance of Mudharaba sukuk, Ijara sukuk and Murabaha sukuk from ten sukuk issuer countries all over the world.

The research results show that the probability of choosing Mudharaba and Ijara sukuk is found in issuers sukuk with a high firm leverage, while the probability of choosing Murabaha sukuk is found in issuers sukuk with a high firm profitability. A three-way interaction moderation model is used in this research to explain that sukuk issuers in countries that implement Sharia law and adopt a legal origin common law system will have a higher choice of Mudharabah and Ijarah sukuk types if the firm’s leverage is high. If the firms’ profitability is high, then the sukuk issuer prefers Murabaha sukuk.

The use of firm’s characteristic variables is based solely on trade-off theory and pecking order theory. Also, limitations on the implementation of Sharia law in countries that do not provide opportunities for countries that apply a mixed law system.

The role of Sharia law and common law legal origin is proven, through a three-way interaction model, to strengthen the interaction of the firm leverage and choice of Mudharaba sukuk.

Legal certainty for Islamic financial institutions is created in the context of ease of investing in sukuk. Flexibility in the structure is also one of the factors that encourage the development of market acceptance of sukuk. The right structure of the sukuk can be used for specific target markets.

There has been no study carried out on a three-way interaction moderation model used to analyse the role of country-specific characteristics. The role of Sharia law and common law legal origin is proven, through a three-way interaction model, to strengthen the interaction of the firm leverage and choice of Mudharaba sukuk.