Reactive powder concrete large-eccentric compression member crack load calculation method

Abstract

The invention discloses a reactive powder concrete large-eccentric compression member crack load calculation method. The stress distribution of the entire compression zone of a member is triangular similarly; the stress of the RPC concrete in the elastic state is still in the triangular distribution before the compression zone reaches the peak tension strain; according to the RPC concrete in the shaping state adjacent to the member compression zone edge, the stress is simplified to be in triangular distribution that the stress of the compression zone edge to the peak tension strain position is zero;an equilibrium equation is established for solution according to the equilibrium conditions of the section force and section torque; in the crack load calculation, the influence of the additional eccentric distance caused by large-eccentric compression member lateral deformation is considered, and the value is found as 5mm. The reactive powder concrete large-eccentric compression member crack load calculation method can be applied to reactive powder concrete large-eccentric compression member design calculation, the theoretical foundation for the is laid for promotion and application of the reactive powder concrete to eccentric compression members, and huge social and economic benefits are provided.

Description

technical field [0001] The invention relates to a calculation method for the cracking load of an eccentric component, in particular to a calculation method for the cracking load of an active powder concrete large eccentric compression component. Background technique [0002] Reactive Powder Concrete (RPC) is a new type of cement-based composite material developed by France in the early 1990s with ultra-high strength, high toughness, high durability, and good volume stability. The increase in powder content and activity is called reactive powder concrete, which is mentioned in reference [1]. Since the advent of RPC, many scholars at home and abroad have conducted a large number of theoretical and experimental studies on the material, mix ratio, durability, strength and microstructure of RPC, among which the representative public literature is reference [2], In actual operation, reactive powder concrete with different mechanical properties has also been prepared by changing t...

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Problems solved by technology

For the calculation of the ultimate load of the specific RPC large eccentric compression member, it is only mentioned in reference [8], but its bearing capacity calculation is completely carried out with reference to the existing general reinforced concrete eccentric compression member, and the reactive powder concrete is not considered at all. The influence of tensile strength on its ultimate bearing capacity makes the calculation results and actual results deviate greatly

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