波形钢腹板连续刚构桥极限跨度研究

发布时间：2018-04-20 05:16

本文选题：连续刚构桥 + 波形钢腹板　；参考：《桥梁建设》2017年04期

【摘要】：针对现有波形钢腹板连续刚构桥跨度偏小的情况,分析影响该类桥梁极限跨度的主要因素,并提出解决限制其跨度增长的关键问题的相应技术措施。分析表明:波形钢腹板的整体稳定性、箱梁的扭转及畸变会极大地限制波形钢腹板箱梁桥的跨度,其最大跨度应该能够达到甚至超过混凝土腹板箱梁桥的跨度。对于30mm厚的1600型波形钢腹板,当钢腹板整体屈曲失稳分别发生在屈服区和非弹性区时,波形钢腹板箱梁连续刚构桥的最大跨度可分别达到162m和238m;增大波高或采用复合波形钢腹板时,该类桥梁的跨度能超过300m。当波形钢腹板箱梁桥的跨度超过160m时,可以考虑采用复合波形钢腹板;当跨度超过230m时,应该采用复合波形钢腹板。设置适当数量的横隔板可以提高波形钢腹板箱梁的抗扭转及抗畸变能力,可采用钢桁架等轻型横隔板以减轻其自重。
[Abstract]:In view of the small span of the existing continuous rigid frame bridge with corrugated steel web, the main factors affecting the limit span of this kind of bridge are analyzed, and the corresponding technical measures to solve the key problem of limiting the span growth are put forward. The analysis shows that the overall stability of the corrugated steel web, the torsion and distortion of the box girder will greatly limit the span of the corrugated steel web box girder bridge, and the maximum span of the corrugated steel web box girder bridge should be able to reach or even exceed the span of the concrete web box girder bridge. For the 30mm thick 1600 type corrugated steel web, when the buckling instability of the whole steel web occurs in the yield zone and the inelastic zone, respectively, The maximum span of continuous rigid frame bridge with corrugated steel webs can reach 162m and 238m respectively, and the span of this kind of bridge can exceed 300m when the wave height is increased or the composite corrugated steel web is adopted. When the span of the corrugated steel web box girder bridge exceeds 160 m, the composite wave steel web can be considered, and when the span exceeds 230 m, the composite waveform steel web should be adopted. The anti-torsion and anti-distortion ability of the corrugated steel web box girder can be improved by setting a proper number of transverse divisions, and the weight of the box girder can be reduced by using light transverse diaphragm such as steel truss.
【作者单位】：中铁二院工程集团有限责任公司;
【分类号】：U448.23

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