Roof structures. Comparisons between traditional roof structures and industrialized ones

Retractable roof structures

j This paper presents a new concept for retractable roof structures. The new structures consist of a foldable lattice of beams connected by cylindrical joints, to which covering panels or membranes are attached. These structures fold towards their perimeter and there is practically no limit to their shape. Solutions to the key problems that have to be solved in the course of the kinematic desig...

Shape Optimization of Cover Plates for Retractable Roof Structures

Department of Engineering, University of Cambridge Trumpington Street, Cambridge CB2 1PZ, U.K. Abstract The optimal shape of cover plates for circular, symmetric retractable roof structures based on a grid of multi-angulated rods connected by revolute joints is considered. It is assumed that these cover plates are co-planar, and hence they are not allowed to overlap in any configuration; they a...

Roof Rats

A Non-contact Monitoring System for Investigating As-built Membrane Roof Structures

A monitoring system that uses applied geomatics techniques, including terrestrial laser scanning and videogrammetry, has been developed in order to determine the behaviour of as-built membrane roof structures. To accommodate the constraints involved in measuring such structures, for example uniform surface texture and unreachable height, the system adopts a non-contact targeting methodology to ...

Generalized roof duality

The roof dual bound for quadratic unconstrained binary optimization is the basis for several methods for efficiently computing the solution to many hard combinatorial problems. It works by constructing the tightest possible lower-bounding submodular function, and instead of minimizing the original objective function, the relaxation is minimized. However, for higher-order problems the technique ...