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A platform for research: civil engineering, architecture and urbanism
The invention discloses a fireproof structure of a built-in inhaul cable steel truss suspension structure, which is characterized in that a prestressed inhaul cable is at least arranged in an inner cavity, communicated with a lower hanging steel column, of a steel truss vertical rod located at the midspan position of the steel truss, and the prestressed inhaul cable is sleeved with a steel sleeve; a first fireproof structure is arranged among the steel sleeve, the steel truss vertical rod and an inner cavity of the lower hanging steel column, the first fireproof structure at least comprises a first fireproof material arranged on the periphery of the steel sleeve, the first fireproof material is provided with at least two sections, the two sections of the first fireproof material can be separated, and the two sections of the first fireproof material are in lap joint with each other to form a lap joint section. Compared with the prior art, when a fire disaster occurs and a part of structural members lose efficacy to cause large deformation and elongation of the prestressed inhaul cable, the two sections of first fireproof materials synchronously deform along with the prestressed inhaul cable and keep lap joint, a closed wrapping effect is provided for the prestressed inhaul cable, effective fireproof protection is provided for key members, the fire endurance of the key members is prolonged, and the service life of the prestressed inhaul cable is prolonged. And the anti-collapse safety redundancy of the steel truss suspension structure is improved.
本发明公开了一种内置拉索钢桁架悬挂结构的防火结构，至少在钢桁架上位于其跨中位置的钢桁架竖杆以及下挂钢柱连通的内腔中设有预应力拉索，预应力拉索外套有钢套管，在钢套管与钢桁架竖杆以及下挂钢柱内腔之间设有第一防火结构，第一防火结构至少包括设于钢套管外周上的第一防火材料，第一防火材料设有至少两节，两节第一防火材料之间可分离，两节第一防火材料之间相互搭接形成搭接段。与现有技术相比，当发生火灾时，部分结构构件失效会引发预应力拉索出现大变形伸长时，两节第一防火材料随之同步变形并保持搭接，为预应力拉索提供封闭包裹作用，对关键构件提供有效的防火保护，延长关键构件的耐火极限，提高钢桁架悬挂结构抗倒塌的安全冗余度。
The invention discloses a fireproof structure of a built-in inhaul cable steel truss suspension structure, which is characterized in that a prestressed inhaul cable is at least arranged in an inner cavity, communicated with a lower hanging steel column, of a steel truss vertical rod located at the midspan position of the steel truss, and the prestressed inhaul cable is sleeved with a steel sleeve; a first fireproof structure is arranged among the steel sleeve, the steel truss vertical rod and an inner cavity of the lower hanging steel column, the first fireproof structure at least comprises a first fireproof material arranged on the periphery of the steel sleeve, the first fireproof material is provided with at least two sections, the two sections of the first fireproof material can be separated, and the two sections of the first fireproof material are in lap joint with each other to form a lap joint section. Compared with the prior art, when a fire disaster occurs and a part of structural members lose efficacy to cause large deformation and elongation of the prestressed inhaul cable, the two sections of first fireproof materials synchronously deform along with the prestressed inhaul cable and keep lap joint, a closed wrapping effect is provided for the prestressed inhaul cable, effective fireproof protection is provided for key members, the fire endurance of the key members is prolonged, and the service life of the prestressed inhaul cable is prolonged. And the anti-collapse safety redundancy of the steel truss suspension structure is improved.
本发明公开了一种内置拉索钢桁架悬挂结构的防火结构，至少在钢桁架上位于其跨中位置的钢桁架竖杆以及下挂钢柱连通的内腔中设有预应力拉索，预应力拉索外套有钢套管，在钢套管与钢桁架竖杆以及下挂钢柱内腔之间设有第一防火结构，第一防火结构至少包括设于钢套管外周上的第一防火材料，第一防火材料设有至少两节，两节第一防火材料之间可分离，两节第一防火材料之间相互搭接形成搭接段。与现有技术相比，当发生火灾时，部分结构构件失效会引发预应力拉索出现大变形伸长时，两节第一防火材料随之同步变形并保持搭接，为预应力拉索提供封闭包裹作用，对关键构件提供有效的防火保护，延长关键构件的耐火极限，提高钢桁架悬挂结构抗倒塌的安全冗余度。
Fireproof structure of built-in inhaul cable steel truss suspension structure
内置拉索钢桁架悬挂结构的防火结构
YAN LIJUN (author)
2024-04-12
Patent
Electronic Resource
Chinese
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