Bài 5 của loạt bài về kết cấu của Bảo tàng Edo Tokyo
This document is a technical paper detailing the construction planning for a large-scale steel structural frame, specifically highlighting the assembly of "super columns" and "super beams" for a high-rise building. [1, 2]
• Structural Details: The steel structure has a total weight of 23,000 tons, with a maximum plate thickness of 100mm and a maximum piece weight of approximately 40 tons.
• Construction Method: A 400t crawler crane is used to lift four super columns first, followed by the installation of jib cranes on top to assemble the super beams on temporary bents.
• Welding and Joining: Due to the large cross-sections, major structural joints are bolted, and thick plates (over 40mm) use automatic electroslag welding for vertical joints, while others use CO2 semi-automatic welding.
Translation
• Figure-2 Installation of vibration control device
• Figure-3 Vibration control device main body
• 5 Construction
• 1) Steel Frame Structure: Both large columns and large beams are truss shapes combined with large-section single members. It is expected that unignorable construction stress will occur if the deformation caused during construction is corrected. Therefore, the construction plan aimed to minimize the need for correction and minimize construction stress.
• 2) Large Section Framework: Due to transportation weight limits per piece, the number of joints increases, with 7,900 major members, 700,000 high-strength bolts, and 250,000m of field welding (6mm conversion). Considering member shrinkage from field welding, main beam joints are bolted to prevent welding cracks and stress.
• 3) Thick Plates: Many steel members are thick (max 100mm) with large welding volumes. For field welding, beam webs thicker than 40mm use automatic electroslag welding suitable for vertical welding. Otherwise, CO2 semi-automatic welding is used. Upper and lower flanges use CO2 semi-automatic welding.
• STEP 1 Crawler crane
• STEP 2 3500tm jib crane
• Journal of Structural Construction Engineering Vol. 1 No. 1 (March 1994)
• 5.1 Steel Frame Erection
• Table-1 Erection Method Plan
• Figure-10 Steel frame erection overview
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