南宁大桥地锚内力性状分析

以南宁大桥的扣索地锚和缆索地锚为对象,研究扣索地锚和缆索地锚的内力性状.采用有限元计算软件ANSYS中的solid45和beam44对南宁大桥扣索地锚和缆索地锚的实际情况进行建模,分析和比较在不同工况条件下扣索地锚和缆索地锚的受力状况.结果表明:地锚分别采用实体单元与梁单元模型,其计算结果基本相同;承台顶部的配重对结构桩体的轴向力影响相对较大达到17%,但对弯矩的影响都很小,效应都小于1%;结构自身具有较好的抗拔性能.大桥吊装的顺利实施证明:采用合理的地锚结构比对结构施加配重更为经济合理.

Internal force characteristics of ground anchors for Nanning bridge

Based on the case of the but ton cable gro und anchor and the cable gr ound ancho r of Nanningbridge, it s the inter nal for ce characteristics w ere stndied. ANSYS so lid45 and beam44 w ere adopted tomodeling , analy zing and comparing the force status in dif ferent w orking co ndit ions. The g round anchorw hich adopted the model of solid element and the beam element separately got the same calculat ion result .The ef fect of the counterw eight of the top bearing plat form o n the axial of the pile body const ructionreached 17% relat iv ely , but on bending moment it w as less than 1%. Finally, the st ructur e it self had betterpullout behavior. T he successful case proves that suitable g round anchor stucture is more ecomomicthan apply ing counterw eight to the engineering ex ample.