【摘要】 京雄高速京雄大桥为飞燕式中承系杆拱桥，主拱肋为对称内倾式提篮拱，采用空间异型变截面扭曲断面，该桥共设置48组吊杆，顺桥向间距9 m。受异型拱肋的影响，吊杆锚区构造各不相同，均为空间异型结构，受力较为复杂。为对吊杆锚区局部合理优化设计提供依据，基于3DEXPERIENCE平台进行锚区设计，分析拱肋节段尺寸、拱肋壁板厚度、吊杆横向偏角、钢锚箱腹板加劲肋刚度、锚腹板倒角高度及锚腹板高度对锚区受力的影响，并确定最优尺寸。结果表明：拱肋节段长度以及拱肋壁板厚度对锚区受力影响较小；吊杆横向偏角对钢锚箱腹板应力影响较大，随着吊杆横向偏角变小，钢锚箱腹板应力逐步减小；钢锚箱腹板水平加劲肋刚度对锚区应力影响明显，能显著改善锚区局部受力；锚腹板倒角高度及锚腹板高度对锚区应力影响较大，会对锚腹板角点受力产生重要影响。更多还原

【Abstract】 The Jingxiong Bridge Beijing-Xiong′an Expressway is a half-through tied-arch bridge, featuring the two inwardly-inclined basket-handle arch ribs which resemble flying birds. A total of 48 pairs of suspenders are installed at a spacing of 9 m along the bridge length. Anchorages in different locations are tailored to address the irregular cross-section of the arch ribs. The design of the suspender anchorage zones was carried out in the 3DEXPERIENCE Platform, to analyze the influences of multiple factors on the load bearing performance of the anchorage zones, including the dimension of arch rib segments, arch rib wall thickness, lateral deviation angles of suspenders, stiffness of stiffeners in webs of steel anchor boxes, as well as the height of the anchor plate chamfer and the height of the anchor plate itself. The optimal dimensions were determined. The results demonstrate that the arch segment length and wall thickness have minimal influence on the load bearing performance of the anchorage zones. The influence of the lateral deviation angles of suspenders on the webs of the steel anchor boxes is significant, as the lateral deviation angles decrease, the stresses in the webs of steel anchor boxes gradually reduce. The stiffness of the horizontal stiffeners in the webs of the steel anchor boxes is a critical influential factor, which can effectively improve the local load bearing performance of the anchorage zone. The influence of the height of the anchor plate chamfer and the height of the anchor plate itself is remarkable, which are closely related to the angular load bearing performance of the anchor plate.更多还原