Design method for increasing progressive collapse resistance of RC frame structure

Abstract

The invention relates to a design method for increasing progressive collapse resistance of an RC frame structure and belongs to the field of natural disaster prevention and reduction of building structures. Progressive collapse resistance of a structure refers to the capability, for resisting local destruction, of an overall structural system. Under the initial local destructive effects of different parts of the structural system, collapse responses are different, however, the progressive collapse resistance as the feature of the overall structural system should be irrelevant to specific initial destructions, and the method is provided aiming at the limitation in measuring the progressive collapse resistance of the overall structural system. Collapse proportionality coefficient and structural bearing capacity safety coefficient are built on the analysis of all typical local initial destructions and irrelevant to specific initial destructions, and accordingly the progressive collapse resistance of the whole structure can be reflected. When the two coefficients are used to analyze the progressive collapse resistance of an eight-storey concrete frame structure, the collapse resistance of the structure designed based on the coefficients is increased evidently.

Description

technical field [0001] The invention relates to a method for considering the progressive collapse resistance of a structure from the perspective of a structural system, which can be used to help improve the overall progressive collapse resistance of a structural system, and belongs to the field of disaster prevention and mitigation of building structures. Background technique [0002] Continuous collapse refers to the large-scale collapse of the structural system caused by the local small-scale initial damage in the structural system. This domino-like chain reaction will lead to serious damage to the structure and even the collapse of the entire structure, resulting in a large number of people. Casualties and property losses, so the design of the structure's anti-successive collapse performance is very important. Structural resistance to progressive collapse performance is the ability of the overall structural system to resist local damage, and there are many methods to impr...

AI Technical Summary

Problems solved by technology

From a mechanical point of view, there are indicators such as failure probability, energy dissipation capacity, natural vibration frequency, strain energy, internal force, stiffness, etc. Although these indicators can be changed to improve the resistance to progressive collapse of the structure, these indicators have nothing to do with whether collapse or damage occurs. It has no direct relationship and is directly related to the selection of the initial local damage. It is special, so it cannot directly reflect the progressive collapse consequences and the progressive collapse resistance of the structure, and does not take into account the interaction between the overall structural system. Therefore, based on these indicators, the The anti-progressive collapse design of engineering structures cannot comprehensively and effectively improve the anti-progressive collapse capability of the overall structural system

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