Design method for improving anti-collapse ability of RC frame core tube structure

Abstract

The invention relates to a design method for improving anti-collapse ability of an RC frame core tube structure. The method comprises: (1) according to established conditions, carrying out conventional design on the RC frame core tube structure to obtain an initial model; (2) selecting a concrete frame or a shear wall key part to carry out failure processing, carrying out static response analysis on the overall structure to assess the collapse state of the overall structure by using finite element software LS-DYNA; (3) if the frame core tube structure does not collapse in step (2), applying dynamic loads continuously, and carrying out analysis on the overall collapse process to assess the collapse state of the overall process; (4) repeating step (2) and step (3) for the remaining key parts so as to obtain response of the frame core tube structure of each key part under the failure state; and (5) carrying out performance design on the RC frame core tube structure, so as to improve the anti-collapse ability of the RC frame core tube structure. According to the method disclosed by the invention, by analyzing of the overall collapse process, whether the RC frame core tube structure collapses or is damaged can be intuitively and clearly determined without using the collapse determination criterion, and the collapse mechanism can be understood and then anti-collapse design can be carried out.

Description

technical field [0001] The invention relates to a design method for improving the anti-collapse capability of an RC frame core tube structure, and belongs to the field of anti-collapse design of civil engineering structures. Background technique [0002] Since the collapse of the Ronan Point Apartment Tower in England in 1968, engineers have gradually begun to pay attention to the progressive collapse caused by partial failure of components in high-rise buildings. In practice, the local components of the structure will inevitably be damaged under the action of earthquakes, impacts, fires or accidental factors (such as terrorist attacks), which will affect the integrity of the structure. At this time, whether the structure can maintain a certain bearing capacity and not The occurrence of progressive collapse is especially important. When the building only has partial component failure but no overall collapse, if it is too late to repair the catastrophic load again, the colla...

AI Technical Summary

Problems solved by technology

However, for large-scale high-rise buildings such as frame core tubes, collapse research is limited by research methods and equipment, and its structural collapse prevention design largely depends on the summary of earthquake damage experience and approximate calculation analysis, lacking an in-depth understanding of the mechanism. understand and know

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