Practical reinforcement determining method for prestressed concrete of full-capacity type low-temperature storage tank

Abstract

The invention relates to a practical reinforcement determining method for prestressed concrete external tank of full-capacity type low-temperature storage tank. Based on the plain cross-section assumption of reinforced concrete member, and respective constitutive relations of concrete, regular reinforcement and prestressed reinforcement, the method of the invention utilizes the equilibrium equation of axial force and bending moment, adopts a method of iterative strain trial calculation of internal force to solve the calculation of stress and strain of concrete, regular reinforcement and prestressed reinforcement of the cross section based on known prestressed scheme, reinforcement scheme of regular reinforcement and internal force of the cross section, and judges whether requirements of carrying capacity and special service state of the full-capacity type low-temperature storage tank are satisfied. The practical reinforcement determining method of the invention is simple, feasible, accurate and effective.

Description

technical field [0001] The invention relates to the field of engineering design of concrete outer tanks, and more specifically relates to a method for determining the practical reinforcement of prestressed concrete for full-capacity low-temperature storage tanks. Background technique [0002] In the engineering design of the concrete outer tank of the full-capacity low-temperature storage tank, since there is no relevant specification in China, it can only adopt the main international and commonly used European and American industry specifications EN 14620 and BS 7777 and other concrete design specifications such as EUROCODE, CEB-FIP model code 1990, etc. These codes have two limit state requirements for the reinforcement calculation of concrete: the bearing limit state (ULS) and the serviceability limit state (SLS). In the ULS state, check whether the outer tank will overturn, whether it will be damaged due to exceeding the strength of the material, whether it will not be ...

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Problems solved by technology

[0004] Since the design method stipulated in China's "Code for Design of Concrete Structures" GB 50010 is the design method of the limit state of bearing capacity, the calculation formulas are based on the assumption of the limit state of bearing capacity, and the calculation is performed by solving equations; the specification does not provide SLS The calculation formula for the state, so the performance parameters required by the above European and American standards for the SLS state cannot be obtained

In addition, the above-mentioned European and American standards only propose calculation parameter requirements, but do not provide specific calculation methods, so it is not easy for engineering designers to implement in the actual implementation process, and the implementation is difficult

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