Damage assessment method of rpc board based on p-i curve under blast load

Abstract

The invention relates to an RPC plate damage evaluation method based on a P-I curve under an action of explosion load. A explosion load point is evaluated according to explosive payload of TNT explosive and explosion distance; based on an equivalent unidirection method, motion histories of a certain point of an RPC plate component is evaluated, a midspan displacement time-history curve of the RPCplate under bending response is acquired, and the displacement peak value of the curve is acquired; an equivalent unidirection system under shearing response is established, a displacement time-history curve of a support seat position of the RPC plate under the shearing response is acquired, and the displacement peak value of the curve is acquired; a damage degree evaluation criterion is defined;the displacement peak value under the midspan bending response, the displacement peak value under the support seat shearing response and the damage degree evaluation criterion are utilized, and thus aP-I curve graph is drawn; and the explosion load point is drawn in the P-I curve graph, and the damage degree is determined. According to the RPC plate damage evaluation method based on the P-I curveunder the action of the explosion load, the possibility that shearing damages occur at the support seat position of the PRC plate component is considered, the evaluation method is safer, and comparedwith an existing evaluation method, the evaluation time can be shortened.

Description

technical field [0001] The invention relates to the technical field of a damage assessment method for plate components under the action of explosive loads, and relates to a damage assessment method for RPC plates under the action of explosive loads based on the P-I curve. Background technique [0002] Explosion accidents occur from time to time, such as the explosion accident in Tianjin Binhai New Area in 2015, which had a huge impact and suffered heavy losses. In the event of an explosion, rapid assessment of damage to structures and structural components is critical. Rapid assessment of the damage degree of structures and structural components under blast loads, first, can speed up the process of post-disaster rescue and repair work, reduce casualties and property losses; Provide evidence. In the existing research, there are few problems in the evaluation of the damage degree of structural components under blast loads, and the evaluation methods are not safe. In order t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the application limitations of the existing damage assessment methods and the complex assessment process, the present invention provides a damage assessment method for RPC panels based on the P-I curve under the action of an explosion load. The present invention provides the following technical solutions:

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