【正文】 s inauguration had already been postponed. Therefore, the steam drum was painted, and the result was deemed acceptable. Construction was pleted at the site in February 2022, and the PS10 plant was inaugurated in June. The facility seems to be working properly in terms of power generation. Moreover, the owner is pleased with the tower39。s external walls and its aluminum cladding appeared too bright when viewed from a distance. Two main options were evaluated: increase the tower39。s requirements, the pleted tower was painted a soft clay color to help it blend in with its surroundings. However, a minor problem arose near the project39。C. with shifts working around the clock, the foundation was pleted in one weekend. During this process, the temperature of the concrete had to be checked every two hours to avoid cracking. Construction of the tower was acplished by means of a straight wooden slip form, the openings and corners of which required extreme care to ensure that their geometry precisely matched that of the design. Temporary columns were used to form the tower39。n Estructural. The tower was designed with a constant wall thickness of 250 mm, as this would make it easier to erect by means of a straight slip form. For the same reason, all openings were designed with flat edges. The structure was also designed in accordance with Spanish codes governing serviceability limit states and ultimate limit states. The design was conducted using a finiteelement model that incorporated both the foundation and the tower to account for the interaction between the foundation and the structure. The model used shell elements for the concrete and beam elements for the steel beams. The plete analysis included six basic loads and 20 load binations. Both the foundation and the tower were designed to withstand dead, service, wind, and earthquake loads, all of which were defined according to Spanish codes. The service load was defined as 5 kN/m2 and applied to all platforms. For the wind load definition, a basic wind speed of 27 m/s was used. The earthquake load was determined using a basic acceleration of . Preliminary Tower Solutions ATLAC 沈陽建筑大學(xué)畢業(yè)設(shè)計 外文翻譯（附一、附二） 15 The project did not require the use of special materials. The concrete used for the tower and foundation has a pressive strength of 30 MPa, and the reinforcement steel has a yield strength of 500 MPa. The staircases and steel platforms are made of galvanized steel, and the steel beams used in the posite platforms consist of regular carbon steel with a yield strength of 275 MPa. Construction was scheduled to begin in June 2022 and conclude in February 2022, the most critical stages involving the slip form work and lifting and assembling the solar receiver and the steam drum. The schedules for civil and mechanical works therefore overlapped and required extensive onsite coordination. The unique nature of the installation caused some delays. For example, platform loads were redefined frequently (some being recalculated 12 times), and the client decided to include extra steel service platforms in the tower39。n Espa241。s wind load was quite high and its northsouth orientation bore the main wind load yet had the lowest inertia, it was not economical to design a deep foundation. Such an approach would also have required a thick slab to connect the tower39。s geometry was defined, the foundation had to be redesigned. Since the tower39。s interior. Made of galvanized steel, the visitor platform, located, as mentioned above, 31 m aboveground, affords visitors an excellent view of the heliostat field while they listen to an explanation of the overall plant39。s load of metric tons, another steel structure is located m below the posite platform. Because the structure must cover a width of m, its two main beams were designed as Ishaped trusses about m high. The steam drum located in the top of the tower and the pumps located below the solar receiver also were supported by means of posite platforms. Because of the large loads and the need to span lengths of as much as m, most inner platforms were designed positely in accordance with the european Commission39。s concrete walls. The posite platform enpassing the tower39。s north concrete wall and transmit the wind load. Initially, the tubular steel structure was to be supported in a posite platform. However, other factors precipitated a change in plans. First, this level of the tower required many supports for ducts associated with the pumps located below and the steam drum located above, as well as electrical equipment. All told, these features impose a total load of metric tons. Second, a service platform would need to enpass the tower39。s shape to the special requirements of the equipment, the design minimized the quantities of materials needed for construction. Moreover, the opening between the two shafts helps to reduce the wind load in the tower39。s reflected rays to reach the receiver. Beginning at an elevation of 100 m, the opening extends m in width and m in height. The four pumps that convey water to the solar receiver are located below the receiver in an independent internal platform located in the central shaft. This platform also supports some ducting and minor equipment. The top platform supports the steam drum and several steam ducts that connect the drum to the solar receiver. None of the water and steam ducts are visible from the outside, in keeping with the initial architectural criteria. The tower39。a asked several panies in the concrete chimneys market to bid on the civil works package. ALTAC was awarded the civil works package even though no architect had been involved in developing the proposed tower design. Since the specifications were quite loose with regard to architectural design, the bidders had to propose certain