The Xiushan Bridge in Zhoushan City is a three-span continuous suspension bridge with elastic bearing systems and with a main span of 926 m.The anchorages of the bridge on both the Guanshan and Xiushan sides are all the gravity anchorages that are provided with the anchor systems of distributive stress transmitting.The design of an anchorage above the ground takes on the triangle configuration that has the separated front toes (support piers) and back toe (anchor block) and the support piers of the left and right parts of the anchorage are located on the ground bases of different elevation.Between the front anchor chambers and the support piers, the arc stiffening slabs are arranged to connect the chambers and the piers and the part of the anchor block beyond the back anchor surface of the anchor system is transversely retracted.The top slab of the front anchor chambers is of the structural form of the integrally cast concrete and the concrete for the slab is to be cast in segments, using the precast hollow slab and steel shell as the bottom formwork.For the anchor system, the components of the steel anchor plates, positioning trusses and positioning supports are designed in standardization, are modularized in group and are assembled in the field by bolt connecting.The software ANSYS is used to carry out the solid element analysis of the anchorage and anchor system and the results of the analysis show that the maximum tensile stress of the concrete is controlled in 4.194 MPa and the maximum slip amount of the shear studs is controlled in 0.38 mm.%舟山市秀山大桥为主跨926 m的三跨连续弹性支承体系悬索桥,其官山侧和秀山侧均采用重力式锚碇、分布传力式锚固系统.锚体设计采用前、后趾分离的三角造型,左、右幅支墩采用不同的基底标高,前锚室与支墩之间设置弧形加劲板进行连接,锚块过锚固系统后锚面位置后横向进行回缩,前锚室顶板分段采用预制空心板和钢壳作为底模其上整体浇注混凝土的结构形式;锚固系统将锚固板、定位桁架、定位支架等构件进行标准化设计、模块化分组,采用螺栓连接的方式现场组拼成型;利用ANSYS软件对锚体及锚固系统进行实体有限元分析,结果表明:混凝土最大拉应力控制在4.194 MPa,剪力键最大滑移量控制在0.38 mm.
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