长江科学院院报2017，Vol.34Issue(12)：78-83,6.DOI:10.11988/ckyyb.20170437
横缝对地下厂房岩锚吊车梁承载力的影响研究
Influence of Horizontal Cracks on Bearing Capacity of Rock-Bolted Crane Girders in Underground Powerhouse
摘要
Abstract
The problem of horizontal cracks in rock-bolted crane girders in underground powerhouse of a hydropower station was very prominent with a lot of penetrating cracks even in construction period,posing safety risks on the long-term stable operation.According to the design and construction condition,the bearing behaviors of the girders with different horizontal cracks distribution were studied by numerical approach and the deformation and forces of crane girder were analyzed.Results show that the horizontal cracks could reduce the local stiffness of girders and increase the deformation.Tensile stress concentrated near the crack tip,and the distribution of tensile stress widened,with some exceeding the allowable range.Nevertheless,the horizontal crack has little effect on the safety factor of the anti-sliding stability.Since the rock-bolted crane girders must be in long-term safety,reinforcement in the horizontal crack concentrated area is needed.关键词
地下厂房/岩锚吊车梁/横向裂缝/数值计算/承载力Key words
underground powerhouse/rock-bolted crane girder/horizontal crack/numerical simulation/bearing capacity分类
建筑与水利引用本文复制引用
吴勇进,董志宏,张存慧,张练..横缝对地下厂房岩锚吊车梁承载力的影响研究[J].长江科学院院报,2017,34(12):78-83,6.基金项目
国家自然科学基金重点项目(51539002) （51539002）
国家自然科学基金面上项目(51379022) （51379022）
中央级公益性科研院所基本科研业务费项目(CKSF2017054/YT) （CKSF2017054/YT）
