12/27/2023 0 Comments Burj dubai towerIn the first half of the 20th Century many iconic buildings constructed with steel rigid frames with wind bracings as Wool Worth Building with 57 stories (1913), Chrysler building with 77 stories (1930) and Empire State Building with 102 stories (1931). And also concepts of prestressing, using high-tensile steel become available in 1920’s. By the 1910’s steel work started to encase in concrete to provide fire resistance. ![]() Through the 19th Century, various building materials as concrete, steel and structural capacities of these materials were developed. In 1903, the first concrete high-rise, 15 story Ingalls Building was constructed. In 1899, Park Row Building reached 30 stories in New York. Home Insurance Building (1885) which is accepted as the first high-rise building, has cast iron and wrought iron columns, wrought iron beams and girders, and thick masonry walls which provide lateral resistance to wind loads. However, it is a common knowledge that the first step of constructing a high-rise is to achieve structural stability. The source of this intense interest can be listed as growing population in city centers, high land prizes and countries’ desire to show economic and technologic status. High-rises are becoming one of the most demanded building typology worldwide. Furthermore, quantity estimation and cost analysis investigations have been conducted for the building, and a final bill of quantities for the used materials has been extracted. The featured tasks for the successful completion of this branch project include: selecting an adequate structural system, creating a structural plan, performing preliminary proportioning for the structural members according to the ECP, acquiring convenient design loads, modelling of floor plan using a structural analysis software, performing precise structural analysis for the floor plan, identifying design demands, designing of reinforced concrete structural members and preparing final structural drawings. The second part of the project, as thoroughly discussed within the contents of the thesis, is the use of the conducted design spreadsheets in the execution of an actual midrise reinforced concrete building, following the guidelines and requirements of the ECP 203 and ECP 201. Also presented, are the necessary validity verifications for ensuring the proper functionality of the spreadsheets and their accuracy in obtaining results. These spreadsheets follow the instructions and limit states of the Egyptian Code for Design and Construction of RC Structures (ECP 203) and the Egyptian Code for Load and Force Calculations (ECP 201). The first of these being the development of structural design spreadsheets using Microsoft Excel, to serve as design tools for the main structural members of midrise buildings, as columns, slabs and beams, with all their different design cases and approaches. The purpose of this paper is to provide an elaborate explanation for the various processes conducted concerning the two main parts of the project. A tremendous burden of responsibility lies on the shoulders of structural engineers, as the room for error is intolerable, and thus, the main objectives which paved the way for the work done throughout this bachelor project, were severe precision and attention to detail. ![]() ![]() Midrise reinforced concrete buildings are an integral constituent of the modern urban environment, and rest assured, their structural implementation is by no means a simple task.
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