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中文摘要：
索张拉控制是预应力空间钢结构施工过程中的核心问题。该文首先讨论了基于控制索原长的倒装张拉控制基本原理,指出现有张拉控制理论存在不考虑实际施工过程中温度变化等不可预知因素影响的缺陷,分析了温度效应对索、杆、梁单元的影响,提出了考虑温差影响的索张拉控制修正过程。最后以某预应力柱面网壳索张拉控制为研究对象,研究温度变化对索张拉控制的影响。结果表明该结构的索张拉控制力修正值在±18度温差范围内大致呈线性变化,按该文方法修正索张力后张拉施工仍能达到设计目标。
英文摘要：
The control of cable tension is a critical issue during the construction of pre-stressed spatial steel structures. The theory of inverse analysis method based on controlling the initial cable length is discussed. Existing theories of tension control do not consider unpredictable factors like temperature changes. The effect of temperature changes on cable, link and beam element is analyzed. A procedure to adjust the cable tension according to temperature changes is proposed. Taking the construction process of a pre-stressed cylindrical latticed shell structure as an example to be investigated, it is found the adjusted cable tension varies linearly when temperature changes within ±18. It is indicated that the tension construction process could achieve the design goal when the cable tension is adjusted according to the proposed method.
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