Equivalent diaphragm wall parameter acquisition method based on discrete numerical method

Abstract

The invention discloses an equivalent diaphragm wall parameter acquisition method based on a discrete numerical method, which sequentially comprises the following steps of: 1) constructing a fiber-discrete spring model, 2) establishing a reinforced concrete composite diaphragm wall numerical model consistent with the actual situation, 3) endowing material parameters to the numerical model, 4) performing uniaxial load numerical tests on the numerical model in x, y and z directions, and 5) obtaining the equivalent diaphragm wall parameters. Obtaining stress-strain curves of the model in three directions; 5) fitting to obtain the elastic modulus of the model in three directions, and obtaining the equivalent elastic modulus of the actual reinforced concrete diaphragm wall; according to the method, the advantage of rotation invariance maintained by three degrees of freedom during model processing is not changed, and mechanical analysis of complex solid materials such as reinforced concrete diaphragm walls is facilitated; and the calculation process is based on simple linear processing, and compared with other numerical calculation software, the input parameters are less, so that the numerical model is fully simplified, and the calculation efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of obtaining the equivalent elastic modulus of a composite ground connection wall, in particular to a method for obtaining equivalent ground connection wall parameters based on a discrete numerical method. Background technique [0002] With the development of urban underground space and the development of rail transit and high-rise building structures, the excavation depth of foundation pits continues to increase. Accompanied by a series of construction safety problems, such as major safety accidents such as foundation pit wall collapse, sounded the alarm for the safe construction of ultra-deep foundation pits. As an enclosure structure, the underground diaphragm wall is widely used in the construction of ultra-deep foundation pits due to its high anti-seepage, small footprint, and strong load-bearing capacity to ensure the safety of the construction process. However, in recent years, the excavation of larg...

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Problems solved by technology

However, the finite element numerical software commonly used in simulation currently has shortcomings such as cumbersome modeling process, low efficiency in solving large-scale models, and insufficient ability to deal with large deformation of materials in solving composite ground wall modeling and mechanical analysis, and cannot be fast and simple. Characterization of Mechanical Properties of Composite Ground Connecting Wall

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