鲁建¹，薛素铎¹，李雄彦¹，刘人杰²
AuthorsHTML:鲁建¹，薛素铎¹，李雄彦¹，刘人杰²
AuthorsListE:Lu Jian¹，Xue Suduo¹，Li Xiongyan¹，Liu Renjie²
AuthorsHTMLE:Lu Jian¹，Xue Suduo¹，Li Xiongyan¹，Liu Renjie²
Unit:1. 北京工业大学建筑工程学院，北京 100124；
2. 烟台大学土木工程学院，烟台 264000
Unit_EngLish:1. College of Architecture and Civil Engineering，Beijing University of Technology，Beijing 100124，China；
2. School of Civil Engineering，Yantai University，Yantai 264000，China
Abstract_Chinese:为研究环形交叉索桁结构(ACCTS)的施工关键技术，利用ANSYS有限元软件建立了直径为100m的ACCTS有限元模型．基于此模型，研究了环梁刚度、支撑柱形式、温度作用、构件制作温度误差对ACCTS的影响；分析了环梁-支撑柱对ACCTS动力性能的影响．此外，基于可靠度理论及非线性规划理论，提出了索长误差限值计算方法并给出了索长误差控制限值．研究结果表明：在一定范围内提高环梁刚度能够有效降低环梁变形，但超出该范围后其作用不明显；通过环梁预调值法可使调整后的环梁处于设计位形，消除了环梁变形对索力的影响，预调后所得预应力与初始预应力之间的误差范围为0.51%~1.12%，满足工程要求；支撑柱两端的约束形式对支撑柱的影响较小，但支撑柱的形状对结构的抗侧移刚度影响较大；满跨、半跨温度作用下的规律基本一致，环梁、拉索制作温度误差对ACCTS上弦索的索力影响较大，撑杆制作误差及整体温度作用对结构的影响较小；环梁-支撑柱对结构的频率和振型有一定的影响，但影响较小，并没有改变结构的基本动力特性；计算所得索长误差限值小于规范值，且分布均匀、利于加工控制．研究结果有助于推动ACCTS在工程中的应用．
Abstract_English:To study the key construction technology of the annular crossed cable-truss structure(ACCTS)，a finite element model of an ACCTS with a diameter of 100m was built using ANSYS finite element software. Based on this model，the effects of ring beam stiffness，support column type，temperature load，and temperature error in component fabrication on the ACCTS are studied. The effects of the ring beam and support column on ACCTS dynamic performance are analyzed. A calculation method for the cable length error limit is proposed based on reliability theory and nonlinear programming theory. The results revealed that improving the stiffness of the ring beam within a certain range can decrease its deformation，but the effects are small outside this range. The effect of deformation of the ring beam on cable forces can be eliminated using the ring beam pre-adjusting method to place the ring beam in the design position. The prestresses obtained after this adjustment are in error with the initial prestresses by 0.51%—1.12%，which meets the engineering requirements. The constraint types at both ends of the support column have a slight effect on the support column，but the shape of the support column has a large influence on structural lateral resisting stiffness. The laws under full-and half-span temperature loads are consistent. The temperature error in the ring beam and cable fabrication has the greatest influence on the internal force of the upper chord cable of the ACCTS，whereas the manufacturing error in the support column and the entire temperature load have less influence on the ACCTS. The ring beam and support column have a slight effect on the structural frequencies and vibrational modes and do not change the basic dynamic performance of the ACCTS. The calculated cable length error limits are less than the criteria values，and their distribution is uniform，which benefits manufacture and control. The research results promote the application of the ACCTS in practical engineering.
Keyword_Chinese:环形交叉索桁结构；环梁刚度；支撑柱形式；动力特性；温度作用；索长误差限值
Keywords_English:annular crossed cable-truss structure；stiffness of ring beam；type of support column；dynamic performance；temperature load；cable length error limit

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