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Numerical Analysis of Inland River Suspended Vertical Container Wharf Under Seismic Load

Author: WuFeiQiao
Tutor: ZhouShiLiang
School: Chongqing Jiaotong University
Course: Port, Coastal and Offshore Engineering
Keywords: Container terminal Seismic performance FEM Time history analysis Modal Analysis
CLC: U656.1
Type: Master's thesis
Year: 2010
Downloads: 45
Quote: 3
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Abstract

Because inland upright container terminal structure type novel, poor working conditions, force structure complexity, coupled with the economic, technical and other reasons, the characteristics of the force has yet to be expanded. Therefore, in order to ensure the safety of wharf structures and suitability to carry out inland upright seismic performance of container terminals is necessary. In this paper, the finite element software ANSYS, on inland upright wharf in high pile under horizontal seismic force performance of numerical analysis, a full and comprehensive understanding of the structure type seismic performance and design and check for the future provision of related reference. The main thesis work and conclusions are as follows: (1) Through the wharf structure modal analysis of three-dimensional model can be drawn: the fundamental frequency wharf structure due to the large presence of vertical linkages beam is raised, thus the vibration is not easy to be excited, is conducive to Seismic; wharf structure 8-order modal values ??showed significant segment concentration, which indicates that the longitudinal and transverse stiffness is more evenly distributed, with good integrity, but according to the FRAME STRUCTURES \appropriate to reduce the stiffness of the beam vertical linkages but is conducive to seismic. Therefore, during the pier should be taken into account when designing the number of beams vertical linkages. (2) through the three-dimensional model of the wharf structure seismic response analysis can be drawn: the main wharf structure bearing member (except piles and beams outside) with the seismic excitation direction is changed, the distribution of which along the excitation direction components as the main force component; pier main components are the maximum shear and bending moment occurs at the bottom of the structure, and in the height direction layer decreases; pier horizontal displacement distribution with the change of the direction of excitation differences in lateral excitation structure produced only lateral displacement, but the structure in the longitudinal excitations in the longitudinal and transverse displacements are produced, of which the longitudinal displacement of the lateral displacement of approximately 25%. (3) were established pile - soil - structure system pier, wharf structure rigid assumption based on engineering calculations and wharf structure simplified two-dimensional finite element model of pile-soil interaction considerations and engineering calculations using a simplified model of the pier bank soil cover layer thicker area overhead vertical seismic performance of container terminals. By modal analysis can be drawn, based on the calculation model assumes a rigid base frequency maximum, with the pile-soil interaction considerations and engineering calculations using the simplified model, the fundamental frequency wharf structure will be smaller, and a simplified model based engineering calculations Frequency Min. By time-history analysis can be drawn, in consideration of the pile-soil interaction pier column after the displacement, shear and bending moment values ??will be smaller, and there is some reduction rules, but the axial force values ??were not affected; When using engineering calculations simplified model, the pier column shear and bending moment values ??pile - soil - Pier large compared to the structural model, but instead reduced displacement, axial force values ??were not affected.

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