MEEN 225, Engineering MechanicsMEEN 225Project 2-Truss Analysis.

Document Content and Description Below

STRUCTURAL DESCRIPTION The first construction crane that was used to build the new Zachry Engineering Education Center was a 1000 EC-H40 Litronic tower crane. This crane has the following configur... ation and specifications: • Tower Configuration III • 2-part Operation Hoist configuration in a LM1 Lifting Mode with Trolley 1 and a Hook Block • Jib assembly with Hook Tip Radius of 234 ft/Jib Tip Radiusof 242 ft • 4-Part Counterjib with a swing radius of 88'-7" • Counterweight (for 4-part counterjib) of 100,310 lbs FIGURE 1. Configuration of 1000 EC-H40 Litronic Tower Crane Based on the configuration and specifications, a structural model of the crane is defined with the following loading and dimensions (expressed in feet), as indicated in Figure 2. Page 10 of the specification sheet provides information on the dimensions and weights of the various crane sections. It is assumed that the weight for each crane section is centered halfway along its length. • Horizontal jib consists of the following crane sections: butt section ①, intermediate sections ②, ③, ④, ⑥, ⑦, ⑧, and tip section ⑩. • Counterjib C is a 4-part counterjib with an inner section, two intermediate sections, and an outer section along with a hoist unit, a platform with electrical panels, and counterweights. The weight of these three crane components are located at the following CG locations from the center of the tower base – Hoist unit: 84.5 ft, Platform with electrical panels: 74 feet, Counterweights: 74 feet Determine the following structural loads for the construction crane. TASK 1 – STRUCTURAL LOADS ON TOWER SECTION A load, L, of 30,000-lbs is lifted by the hook block at a distance, D, of 201-ft along the horizontal jib, measured from the center of the tower base. • Determine the safety margin for this load, L, based on the specification sheet for this crane configuration. • Modeling the construction crane as a two dimensional structure, determine the vertical reaction forces at the four corners of the top climbing tower section. [Show More]

Last updated: 2 years ago

Preview 1 out of 5 pages