Best-fit thrust network analysis

Chapter 7 introduced Th rust Network Analysis (TNA) as a method for designing three-dimensional, compression-only equilibrium networks (thrust networks) for vertical loads using planar, reciprocal form and force diagrams. Th ese diagrams allow the high degree of indeterminacy of three-dimensional force networks to be controlled such that possible funicular solutions for a set of loads can be explored. By manipulating the force diagram (through simple geometric operations), the distribution of horizontal thrusts throughout the network is changed and diff erent three-dimensional confi gurations are obtained. Th ere are infi nitely many possible variations of the force diagram, each corresponding to a diff erent threedimensional solution for given loads and boundary conditions. Th is provides virtually limitless freedom in