The structures are substantially different from typical building structures where there are no diaphragms with lumped mass. The current practice is to estimate the seismic loads for these structures using parameters of similar building-type structures. In other words, the sizes and layout of the pressure vessels is what determine the cross section of the frame beams and columns. For Frame action computability, the columns cross sections are seized based on the sizes of the beams rather than the size that are required to resist gravity and lateral loads.
To provide sufficient embedment of the anchor bolts and the required strength for the anchor bolts to support uplift force due to wind loads, the beams of the frames are very deep and wide in cross section. The pressure vessels are connected to the frames using a circular pattern of relatively deep anchor bolts. The unit is a complex structure that consists of massive reinforced ordinary reinforced concrete frame which supports pressure vessels and steel towers carrying maintenance platforms. Table-top structures are unique type of structures and commonly found in large refineries where they are used to process heavy crude oil.
0 kommentar(er)
