Abstract
In order to study the dynamic response of the integrated station-bridge structure under the pile-soil interaction, a model was established by finite element software for dynamic analysis. According to a practical project, two mechanical models are established: one is the pile-soil interaction model, the other is the rigid foundation model. The dynamic responses of the two models were analyzed respectively, and then the results were compared. The results show that: the structure with pile-soil interaction has a longer period and higher flexibility; Under the action of frequently occurred earthquakes, the maximum displacement of the structure with pile-soil interaction increases and the base shear decreases; Under the action of seldomly occurred earthquakes, the structural displacement and base shear under the pile-soil interaction become larger, and the transverse displacement is more affected than the longitudinal displacement. It is concluded that: the assumption of rigid foundation makes the result more conservative, and the influence of pile-soil interaction cannot be ignored in seismic response analysis.
Highlights
Elevated station buildings can generally be divided into two categories: “integrated station-bridge structure ”and “detached station-bridge structure”[1,2].The separation of other major structures bearing non-vehicle loads and the crane girder structures bearing vehicle loads is “detached station-bridge structure”; otherwise, it is “integrated station-bridge structure”
In order to study the dynamic response of the integrated station-bridge structure based on pile-soil interaction, this paper takes the actual engineering of xi 'an metro line 5 as an example and establishes models through finite element software .The “m ”method [12] was used to simulate the pile-soil interaction
In orderto obtain the base shear of the structure, the model was calculated by the mode superposition response spectrum method and time history analysis
Summary
Elevated station buildings can generally be divided into two categories: “integrated station-bridge structure ”and “detached station-bridge structure”[1,2].The separation of other major structures bearing non-vehicle loads and the crane girder structures bearing vehicle loads is “detached station-bridge structure”; otherwise, it is “integrated station-bridge structure”. The integrated station-bridge structure is composed of building units and bridge units. The earthquake resistant design code for buildings and bridges is usually used to design detached station-bridge structures. In order to study its dynamic response, we usually combine the building and the bridge into a structure[7] and analyze the structure. In order to study the dynamic response of the integrated station-bridge structure based on pile-soil interaction, this paper takes the actual engineering of xi 'an metro line 5 as an example and establishes models through finite element software .The “m ”method [12] was used to simulate the pile-soil interaction. The dynamic response and stress characteristics of structures under earthquake action are analyzed, and the results are compared to obtain the effect of pile-soil interaction on the structure
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