Design method of vibration control structure for historic building close to subway

Abstract

The invention provides a design method of a vibration control structure for a historic building close to a subway, which comprises the following steps of: (a) establishing a corresponding subway tunnel-soil layer finite element analysis model according to an operated similar subway road section; (b) actually measuring the vibration response of the control point in the operated similar subway section, and comparing and checking the calculated value of the vibration in the step (a) by utilizing the actually measured value; (c) establishing an ancient building finite element analysis model; (d) actually measuring the dynamic characteristics of the historic building, and comparing and checking the calculated value of the basic frequency in the step (c) by utilizing the actually measured value; (e) modeling by taking the historic building and the vibration isolation layer as an integral structure, and comparing and adjusting related parameters of the vibration isolation layer; and (f) according to the steps (a)-(e), creating a tunnel-soil layer-historic building finite element analysis model, the design method can effectively reduce the influence of subway vibration on the adjacent historic building, and the vibration control requirement of the historic building is met.

Description

technical field [0001] The invention belongs to the technical field of building structure vibration control, and in particular relates to a design method of an ancient building vibration control structure Background technique [0002] At present, the subway, which is the main line of the city, is in full swing and large-scale construction. Due to factors such as passenger flow and line network, it has to approach or pass through some sensitive buildings, including ancient buildings. However, due to the influence of the natural environment for thousands of years, the structural durability of ancient buildings has been greatly attenuated, and they are especially sensitive to vibration. Although this persistent small-amplitude vibration will not instantly cause serious damage or even collapse of the structure like an earthquake, it may also cause fatigue damage due to the huge number of vibrations over time, which will lead to the destruction of ancient buildings. Therefore, i...

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Problems solved by technology

However, there is no unified standard and design process for this method at present. Generally, vibration control design is carried out by relying on past experience or directly copying similar construction projects. The object is not targeted, and the method lacks scientific and rationality. As a result, the design scheme cannot achieve the expected vibration control effect, and there are still certain safety hazards. The buildings may still not be able to be used normally, and even very few need to be reworked and redesigned, causing a sharp increase in costs.

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