Full-Scale Experimental Study of Impact Demands Resulting from High Mass, Low Velocity Debris

Aghl, P. Piran; Naito, Clay; Riggs, H. R.

doi:10.1061/(asce)st.1943-541x.0000948

Cited by 43 publications

(21 citation statements)

References 10 publications

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“…Previously, an equivalent 1D linear elastic bar model was developed and validated by experimental data [22]. In this paper, an equivalent 1D inelastic bar model is proposed to account for the inelastic response of the debris during axial impact.…”

Section: Equivalent One-dimensional Inelastic Bar Modelmentioning

confidence: 99%

“…In 2012, Piran Aghl et al [22] conducted full-scale impact tests on a 6.1 m steel tube and an International Organization for Standardization (ISO) shipping container measuring 6.0 m long, 2.4 m wide, and 2.6 m high. The steel tube was a standard AISC rectangular HSS 64 Â 38 Â 4.8 mm (2.5 Â 1.5 Â 3/16 in.)…”

Section: Experimental Programmentioning

confidence: 99%

“…Formulae were obtained to estimate impact durations and effective contact stiffness (k) of concrete columns and shipping containers based on the simulation results. Recently, full-scale in-air axial impact tests of a wood utility pole, steel tube and shipping container have been conducted [22]. The main focus was on the elastic behavior of wood poles and shipping containers, and a simplified elastic model for debris impact force estimation was developed [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, full-scale in-air axial impact tests of a wood utility pole, steel tube and shipping container have been conducted [22]. The main focus was on the elastic behavior of wood poles and shipping containers, and a simplified elastic model for debris impact force estimation was developed [22][23][24][25]. A small-scale model of the shipping container was tested in a wave flume to investigate the effect of water on debris impact forces [23,27]; see also [26] for related experiments and simulation.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, in-air axial impact of debris is examined. The FE models are validated by comparing computed responses with the results from full-scale in-air debris impact experiments [22]. Different axial impact cases of the shipping container are considered to examine the inelastic response under impact velocities up to 15 m/s.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of demands resulting from inelastic axial impact of steel debris

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Section: Equivalent One-dimensional Inelastic Bar Modelmentioning

confidence: 99%

Section: Experimental Programmentioning

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

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Estimation of demands resulting from inelastic axial impact of steel debris

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A Vision Based System Design for Over-Sized Vessel Detecting and Warning Using Convolutional Neural Network

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Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Measuring the impact: new insights into flood-borne large wood collisions with river structures using an isolated sensor-unit

et al. 2022

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Large Wood (LW) transported during floods or channelized mass flows poses a high risk for engineered structures, often leading to significant damage or total failure of the impacted structure. To date little is known about impact magnitudes caused by LW collisions. To better control for such interactions, a better understanding of transport dynamics and impact forces is required. The present laboratory study employs state-of-the-art sensor units installed in scaled logs to capture acceleration data from collisions of waterborne LW with 2 in-stream structures—bridge pier and retention structure—each providing different examples of rigid engineered systems. Through precise measurements of acceleration and impact duration (stopping time), the resultant impact forces of LW collisions can be calculated. Here, for the first time, impact forces were quantified in a scaled stream environment based on the inertial frame of the object causing the impact, rather than the more commonly used instrumented structure approach. High-resolution accelerometer measurements were compared to conventional analytical (force balance) approaches. They revealed the need for accurate inertia measurements to appropriately account for prevailing hydraulic flow conditions and the effects of LW interactions in fluvial environments. Although log velocity and stopping time are crucial parameters for assessing LW impact forces, accurate measurements are still elusive due to limitations in available sensing techniques. By presenting proof-of-concept results, this study contributes to an improved understanding of LW impact forces during floods. Based on these encouraging results, we recommend more sensor-based field studies in future, needed for the design of resilient structures.

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Full-Scale Experimental Study of Impact Demands Resulting from High Mass, Low Velocity Debris

Cited by 43 publications

References 10 publications

Estimation of demands resulting from inelastic axial impact of steel debris

Estimation of demands resulting from inelastic axial impact of steel debris

A Vision Based System Design for Over-Sized Vessel Detecting and Warning Using Convolutional Neural Network

Measuring the impact: new insights into flood-borne large wood collisions with river structures using an isolated sensor-unit

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