Dept. of Architectural Engineering, Gyeongnam National University of Science and Technology, 33, Dongjin-ro, Jinju-si, Gyeongsangnam-do 52725, Republic of Korea.
Department of Construction Science, Texas A&M University, 3137 TAMU, College Station, TX 77843-3137, United States.
Appl Ergon. 2018 Apr;68:72-79. doi: 10.1016/j.apergo.2017.11.003. Epub 2017 Nov 11.
Since ironworkers walk and perform their tasks on steel beams, identifying the effects of slippery steel beam surfaces on ironworkers' gait stability-which can be related to safety risk-is critical. However, there is no accepted or validated standard for measuring the slipperiness of coated steel beams, which makes evaluating and controlling for slipperiness a challenge. In this context, this study investigated the effect of the slipperiness of steel beam coatings on ironworkers' gait stability. Accordingly, to identify the relationships between coefficient of friction, perceived slipperiness, and gait stability-represented as the Maximum Lyaponuv exponent (Max LE)-an experiment was conducted with eight different surfaces and sixteen subjects with varying experience as ironworkers. The experiment's results indicate that the slipperiness of the various surfaces greatly affect ironworkers' gait stability while they walk on coated steel beam surfaces. In detail, the Max LE of two subject groups-experienced and inexperienced ironworkers-highly correlated with both the dynamic coefficient of friction values measured by following ANSI B101.3 and with the subjective rating scores of the inexperienced subject group. Unlike subjective rating scores-which were particularly incongruent among experienced workers-the Max LE of inexperienced and experienced subjects has a consistent pattern. This study result highlights an opportunity for using gait stability measurements to quantify and differentiate the safety risks caused by slippery coated steel beams in the future.
由于钢铁工人在钢梁上行走并执行任务，因此确定光滑钢梁表面对钢铁工人步态稳定性的影响（这可能与安全风险有关）至关重要。然而，目前还没有被认可或验证的标准来测量涂层钢梁的滑溜程度，这使得评估和控制滑溜程度成为一个挑战。在这种情况下，本研究调查了钢梁涂层的滑溜程度对钢铁工人步态稳定性的影响。因此，为了确定摩擦系数、感知滑溜程度和步态稳定性之间的关系（表现为最大 Lyaponuv 指数（Max LE）），对 16 名不同经验的钢铁工人在 8 种不同表面上进行了实验。实验结果表明，不同表面的滑溜程度极大地影响了钢铁工人在涂层钢梁表面行走时的步态稳定性。具体而言，两个受试群体（有经验和无经验的钢铁工人）的 Max LE 与通过遵循 ANSI B101.3 测量的动态摩擦系数值以及无经验受试群体的主观评分高度相关。与主观评分不同（经验丰富的工人之间特别不一致），无经验和有经验的受试群体的 Max LE 具有一致的模式。本研究结果强调了未来使用步态稳定性测量来量化和区分因滑溜涂层钢梁而导致的安全风险的机会。
