【正文】 esigned. Since the tower39。s shape was not cylindrical, the wind load was not independent of the direction. Because the tower39。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 concrete wall and the piling. Therefore, the foundation eventually was redesigned to be round and shallow with a diameter of m and a thickness varying from to m. Fortunately, the water table was below the level of the foundation. Stability and ground capacity were verified to ensure that they afforded the necessary serviceability limit states. reinforced concrete was designed for serviceability limit states and ultimate limit states in accordance with the requirements of the Spanish standard Instrucci243。n Espa241。ola de Hormig243。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 沈陽建筑大學畢業(yè)設計 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。s west shaft. Moreover, parts of the tower had to be insulated externally to avoid high temperatures in the concrete shell. The foundation, consisting of nearly 2,000 m3 of concrete, was built during the summer with temperatures above 35186。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。s opening, which is located between the elevations of 100 and m. Once the slip form was dismantled, some temporary platforms were installed around and inside the tower to facilitate the remaining work. From then on, two separate crews worked simultaneously, one in the central area and the other in the lateral shafts. One crew installed the steel beams of the posite platforms using a crane and trained personnel. Then the decking and concrete slabs were constructed, and the solar receiver and the steam drum were installed. Special care was taken to verify that the beam supports were level, as that was crucial to ensuring the correct distribution of the loads in the platforms. Meanwhile, one of the two crews installed the elevator, the staircase, the ladder, the visitor platform, and the steel service platforms. To fulfill the client39。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。s conclusion. Because of an engineering redesign in the last stage that required the steam drum to be installed 3 m higher than originally planned, the drum was located above 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 height by constructing a 3m high external concrete wall or paint the aluminum cladding the same color as the tower. From an 沈陽建筑大學畢業(yè)設計 外文翻譯（附一、附二） 16 architectural point of view, the first option was preferable because it would have concealed the steam drum. However, the project was almost finished, and adding an extra wall would have required a delay of at least two months. Such a delay was not possible, as the power plant39。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 aesthetic appeal because people identify the PS10 project with the tower. In fact, Sevilla residents have already