Retraction: The editors of Engineering Solid Mechanics retract this article [1] due to severe plagiarism.

This paper investigates various techniques used to solve the differential equations governing the free vibration of columns. The present work focuses on the study of the free vibration of Euler’s Bernoulli column of equal strength in compression, considering its own weight and the axial load in compression and tension while subjected to symmetrical boundary conditions. The investigation utilizes the differential quadrature method to examine the fifth natural frequency parameters of the column in different states of column boundary conditions and varying geometric section shapes, including pin-pin and clamp-clamp configurations. The results of this work contribute valuable insights for informed decisions on selecting the cross-section types and appropriate boundary conditions for ensuring the stability of such columns in civil constructions.

Immediate aid to survivors of a natural disaster is the keynote to crisis management. Providing temporary access is one of the most important principles of immediate relief. However, in the post-disaster conditions, it is not possible to use road construction machinery, especially in rural areas. Therefore, in this study, the feasibility of using a Rapid Assembly Building (RAB) system for the temporary pavement with the possibility of rapid construction, which follows the natural topography of the place, is investigated. The introduced system consists of a high-density polyurethane (PUR) foam core as well as two continuous layers of high-density polyethylene (HDPE) facings. For this purpose, the mechanical properties of the materials and composite pavement were determined by a series of laboratory tests. Then, the mechanical performance and bearing behaviour of an element of the presented pavement system was numerically modelled under AASHTO loading. Since in the post-disaster situation, it is not possible to establish the subgrade, an uncompacted subgrade is used for modelling. The results show that this system can be used well in post-disaster situations to provide a rapid, safe, yet robust road without any permanent deformation.

Fabric Formworks which are made using textile sheets such as Polyolefin, Polyesters/Polyethylene Terephthalate, nylon and Polypropylene are being used instead of conventional formworks in the construction industry. This article summarises significant studies and provides an updated review of references on the structural performance of fabric formworks over the last decade. The survey showed that they could be categorised into seven themes; namely, “Feasibility studies and manufacturing methods of complex structural elements”; “Finite element modelling, structural optimizing and form-finding themes”; “Pneumatic / Vacuumatic formwork theme”; “Durability, sustainability, efficiency and quality improvement”; “Cable-net fabric formwork theme”; “Stay-in-place structural formworks theme”; and “Review papers”. These categories comprise about 25%, 17%, 15%, 15%, 10%, 6% and 6% of related studies respectively.