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相关概念视频

Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

39
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
39
Typical Model Studies01:30

Typical Model Studies

311
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
311
Indeterminate Structure01:18

Indeterminate Structure

495
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
495
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

334
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
334
Design Example: Maintaining Level of an Embankment01:19

Design Example: Maintaining Level of an Embankment

48
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
48
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

120
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
120

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相关实验视频

Updated: May 29, 2025

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
00:09

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

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对于浅层基础桥梁的扫地模拟和边界条件转换技术的研究.

Gangping Fan1, Huanzhe Li1, Tianzhuo Wang1

  • 1School of Civil Engineering, Heilongjiang University, Harbin, 150080, China.

Scientific reports
|February 7, 2025
PubMed
概括

浅基础桥梁可能因洪水冲洗而崩. 这项研究揭示了极端条件会产生扫坑,导致空洞和潜在的故障,为安全分析提供了新的模拟方法.

关键词:
合模拟的合模型基金会的空白无效.河床侵蚀 河床侵蚀浅层埋藏的基础桥梁是浅层埋藏的基础桥.

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Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
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Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
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Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

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相关实验视频

Last Updated: May 29, 2025

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00:09

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科学领域:

  • 土木工程 土木工程是指土木工程.
  • 地质技术工程 地质技术工程
  • 液压工程 液压工程 液压工程

背景情况:

  • 桥梁的浅基础容易受到洪水冲洗的影响,因为水深和土壤接触有限.
  • 扫除可以导致基础空洞,严重威胁到桥梁结构完整性和安全性.

研究的目的:

  • 在各种水文条件下调查浅底桥梁的河床清理特征.
  • 开发一种新的方法来模拟复杂的扫形式及其对桥梁结构的影响.

主要方法:

  • 利用计算流体动力学 (CFD) 来模拟液压效应和扫描.
  • 采用点云逆向工程,从3D坐标数据生成河床表面.
  • 实施的流体结构相互作用 (FSI) 技术用于多物理场合 (水,土壤,结构).

主要成果:

  • 高水位和流速显著增加了扫深度.
  • 极端条件导致马旋,形成扫坑,导致基础空洞.
  • 在2580s观察到初始空洞,达到最大深度为-2.51m和0.5%的空洞面积,并继续增加.

结论:

  • 拟议的方法有效地将扫描模型边界条件转换为结构分析的机械模型.
  • 这种方法克服了在桥梁洪水损害研究中模拟复杂的冲洗现象的局限性.
  • 提供了可靠的技术基础,为未来的研究提供一个可靠的技术基础,用于研究在洪水冲洗下浅基础桥的脆弱性.