The term Interlaced Space Structures (ISS) corresponds to a coupled system of naturally curved flexible panels/strips interlaced together according to a design pattern. The goal of the present study is to look for a physically-based and efficient form-finding procedure in order to interactively explore different interlaced morphologies with respect to the design parameters for structural design purposes. Each panel is considered as an in-extensible discrete kirchhoff rod and the rest shape of the coupled system rods is obtained via a constrained total energy minimization. The interlacing pattern is translated into a set of overlap order constraints and applied to the optimization problem. An implementation of the interior-point filter linesearch algorithm with the Quasi-Newton procedure has been employed to solve the constrained nonlinear optimization. The approach is then discussed and commented in detail through a number of form-finding case studies.
<p>In Switzerland, a considerable number of transportation infrastructure rehabilitation projects are expected till 2020. In this new context of mobility, rehabilitation projects have become increasingly complex under various constraints, such as the traffic maintenance under reconstruction and the rapid facility delivery with the minimum cost. This paper brings insights from our practice on how new technologies such as the Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) and the fiber composite sandwich decks could be leveraged for the best satisfaction of these macro constraints. The assessment is based on two criteria of the facility delivery time and the traffic control under reconstruction. The application of UHPFRC is discussed both as a waterproofing layer integrated to the pavement layout and also as a promising reinforcement technology for concrete deck rehabilitation. A project is also reviewed highlighting a fiber composite sandwich deck as a replacement solution enhancing a rapid facility delivery.</p>
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