We consider the optimal control of a crane-trolley-load model, where the crane beam is subject to the PDE of static linear elasticity and the motion of the load is described by the dynamics of a pendulum that is fixed to a trolley which moves along the crane beam. The resulting problem serves as a prototype for optimal control of fully coupled partial and ordinary differential equations. This t...

Abstract The productivity of work performed at construction sites is primarily dependent on the effective deployment and use machinery. Nevertheless, manufacturers do not state actual performance their machinery because it difficult to determine due its dependence specific conditions present each site. One most important machines used in buildings tower crane, which provides secondary transport...

While up-right build structures are under construction, an over-hung crane has a major role in efficient lifting and transporting heavy materials from one point to another. There several types of cranes for variety construction sites, such as bridge/overhead, barge lift, tower crane, etc. The mobile is the most widely used equipment due its mobility. Unfortunately, number accidents including ca...

geographic information systems (gis) are one of the fastest growing computer-based technologies of past two decades, yet, full potential of this technology in construction has not been realized. based upon gis capabilities, construction site layout is one of the areas that gis could be applied. the layout of temporary facilities (tfs) such as warehouses, fabrication shops, maintenance shops, co...

Selecting a target market in right and effective way, which is one of the very first steps entering international market, plays significant role achieving organization’s export goals enhancing them. In this study, using conducting interviews, organization tower crane sector was examined termsof its strategies selection. The company, prefers research with secondary data due to fast results, time...

Abstract Accurate dynamical models are imperative to the development of accurate monitoring and control systems, which foundational safety in construction infrastructure projects. However, highly coupled non-linear dynamics crane systems requires application many simplifying assumptions model. To achieve control, simplifications should yield minimal error modelled behaviour for maximal reductio...