Experimental investigation of the effects of contraction on tsunami-induced forces and pressures on a box section bridge

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Farzad Farvizi , Bruce W. Melville , Asaad Y. Shamseldin , Seyedreza Shafiei
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引用次数: 1

Abstract

Many bridges that lie within possible tsunami inundation zones are critical links in transport networks. Some efforts have been made to determine the effects of tsunamis on bridges, but only a limited range of published design guidelines are available. Therefore, it is necessary to further investigate the effects of tsunamis on bridges. In the current study, physical modeling experiments were carried out to measure bore impact forces and pressures for various tsunami bore strengths on a bridge deck with different abutment types (wing wall and spill-through) and different opening and submergence ratios. The experiments were conducted in a wave flume with dimensions of 14 × 1.2 × 0.8 m (length × width × height), equipped with an automatic gate designed to generate a tsunami bore. The horizontal and vertical forces showed an increasing trend with increasing submergence ratio for both types of abutment. However, the horizontal force showed a decreasing trend as the opening ratio decreased, while the vertical force initially increased as the opening ratio decreased, until it reached a peak value, and then it started to decrease. The overall shapes of the results for both types of abutment are similar, with higher values for spill-through abutments due to their lower energy dissipation rates. Based on the experimental data, empirical equations are proposed for estimation of tsunami loads as a function of opening and submergence ratios.

箱式截面桥梁收缩对海啸力和压力影响的实验研究
位于可能发生海啸的淹没区内的许多桥梁是交通网络的关键环节。人们已经做出了一些努力来确定海啸对桥梁的影响,但只有有限范围的已出版的设计指南。因此,有必要进一步研究海啸对桥梁的影响。本研究通过物理模拟实验,测量了不同桥台类型(翼墙和溢流)、不同开孔比和淹没比的桥面上不同海啸孔强度下的孔冲击力和压力。实验在一个尺寸为14 × 1.2 × 0.8 m(长×宽×高)的波浪水槽中进行,配备了设计用于产生海啸孔的自动闸门。两种桥台的水平力和竖向力均随淹没比的增大而增大。水平力随开度比减小呈减小趋势,垂直力随开度比减小呈初始增大趋势,达到峰值后开始减小。两种桥台计算结果的总体形状相似,溢流桥台由于耗能率较低,计算值较高。根据试验数据,提出了海啸荷载随开口比和淹没比变化的经验方程。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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