The Effect of Selecting Earthquake Coefficients on The Seismic Performance of Block Gravity Quay Walls (original) (raw)

Seismic Behavior Evaluation of the Hump-Back Block Type Quay Wall

A quay is a long platform beside the sea or river where boats and vessels can berth and loaded and unloaded. Gravity quay wall are the most common type of marine structures and some advantages of this type are easy construction technology, good durability and suitable costs. In safety of harbor facilities, gravity quay wall plays a key and drastic role in supporting of harbor structure against some probable dangers. Any abrupt movement or destruction that occurs by an earthquake may result huge economic losses and some irreparable problems. For better understanding of influence of some basic components, dynamic analysis on different geotechnical parameters such as; backfill elasticity module, backfill internal friction, backfill special weight, seabed relative density and wall’s concrete special weight have been done. A two finite element program PLAXIS 2D, is used to carry out all numerical experiments on a reference model. Results show that in all cases where the foundation soil is relatively soft and loose, a gravity quay wall shows more displacements at foundation level and unsuitable behavior to rotate towards the sea. This study has manifested a specific relation between soil seabed density and seabed width, moreover, in a hump-back quay wall maximum amount of settlement of backfill occurs at a predictable distance from the wall that it could account a different and practical behavior, in comparison with other types of quay wall. So, informing of these predictable behaviors could help us in achieving an optimized design.

Effect of Foundation and Backfill Relative Density on the Seismic Performance of a Quay Wall

2018

The seismic performance of quay walls is of vital importance for trade operations that may affect the local or national economy. Depending on the method or quality of construction, some quay walls may be vulnerable to large permanent seaward movements, settlements and tilt, which may disrupt their operation after a strong ground shaking. This article examines the seismic performance of the quay wall of a Greek port through an extensive numerical investigation using effective-stress analysis. The quay wall consists of a stack of concrete blocks having a height of 14.3 m and founded on a layer of rockfill and sandy gravel. The material properties are obtained from laboratory tests based on three boreholes at the quay wall site, SPT tests and a cross-hole test. For non-cohesive soils, a modification of the generalized plasticity model by Pastor et al. (1990) for monotonic and cyclic loading is used, whereas for cohesive soils, the Mohr-Colomb elasto-plastic model combined with hysteret...

Influence of Far and Near Fault Earthquake on Dynamic Behavior of Block Type Quay Wall

Electronic Journal of Geotechnical Engineering, 2017

By scientific advancement in recent years, our knowledge about earthquake and distance effects of faults fundamentally has improved which it has provided basis of definition in seismic design of structures. Dynamic behavior of a block type quay wall that is placed near or far to a fault is not exceptional. Comparison of time history and frequency content in multiple registrations recorded of far and near quake faults shows that the reached vibration to different points can have severe dependence to fault distance, relative positioning to the direction of the fault, and characteristic of source parameters. In the beginning of this article general characteristics of far and near earthquake-faults is defined and then in separated form, impacts of far or near faults on two different common types of block type quay wall have been considered. All analysis by finite element method and PLAXIS 2D software is performed and soil was modeled, Elasto – Plastic with Mohr-Coulomb criteria.