2026-10-14T08:33:38Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33815500 2026-09-15T18:07:33Z category_4 category_12 category_14 category_734 category_106 portal_5 item_type_3 month_year_09_2026

<p>Topology optimization density contour data.</p> Kunmiao Xu (24950728) Shuai Gong (606569) Wei Wang (17594) Xin Wang (91924) Siyuan Liu (696701) Shuming Yan (20601335) Biochemistry Cell Biology Molecular Biology Biological Sciences not elsewhere classified Science Policy three vehicles rolled strength alloy steel simultaneously improves safety semitrailer collision condition redirection functions meet lateral intrusion resistance large passenger bus economic analysis shows semitrailer &# 8212 2013 &# 8212 01 &# 8211 vehicle lateral intrusion overall material cost material consumption lowers impact attitude stability post guardrails due guardrail &# 8217 impact attitude &# 8220 conventional guardrails vehicle requirements vehicle conditions xlink "> topology optimization theoretical basis technical support study demonstrates structure co stable post paper proposes oversized cross new generation lightweight design jtg b05 insufficient post inclined h heavy truck excessive self engineering application design method 7 %. 230 kg 180 kg 15 %. <div><p>To address the issues of excessive self-weight and insufficient post-impact attitude stability inherent in traditional HA-level (extra-high grade) beam-post guardrails due to oversized cross-sections, this paper proposes a lightweight design method utilizing 700L high-strength alloy steel. Through topology optimization, a novel guardrail structure comprising “inclined H-shaped posts” and “rectangular tube beams” was developed. Full-scale vehicle crash tests show that under the HA-level heavy-vehicle impact matrix specified in JTG B05-01–2013—namely a 25 t extra-large passenger bus, a 40 t heavy truck, and a 55 t tractor-semitrailer—the guardrail’s containment and redirection functions meet the corresponding HA-level heavy-vehicle requirements. None of the three vehicles rolled over, overrode, or straddled the guardrail, and all exited with stable post-impact attitude. Vehicle lateral intrusion is substantially reduced: under the 55 t tractor-semitrailer collision condition, the maximum dynamic equivalent vehicle lateral intrusion value (VIn) is reduced by 64.2% compared with conventional guardrails. In terms of lightweight design, the weight per linear meter of the guardrail is decreased from 230 kg to 180 kg, representing a reduction of 21.7%. Economic analysis shows that the reduction in material consumption lowers the overall material cost by approximately 10%–15%. This study demonstrates a material-structure co-design method that simultaneously improves safety, lateral intrusion resistance, lightweight level and economy for HA-level heavy-vehicle conditions, providing a theoretical basis and technical support for the engineering application of a new generation of high-performance bridge guardrails.</p></div> 2026-09-15T18:07:29Z Dataset Dataset 10.1371/journal.pone.0358588.s001 https://figshare.com/articles/dataset/_p_Topology_optimization_density_contour_data_p_/33815500 CC BY 4.0