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中文摘要：
随着我国经济的发展,大跨度空间钢结构的形式也日趋复杂,施工过程对结构的影响不能忽略.结构施工过程中的力学问题属于施工力学的范畴,是耦合了时间与空间的四维分析.采用施工力学方法对三个大跨度复杂钢结构工程进行施工过程跟踪模拟分析,同时将有限元计算结果同实际监测结果进行对比.研究表明：进行施工过程模拟分析不仅可以优化施工方案,而且可以保证施工过程中结构的安全并使成型结构的内力和变形满足设计要求.在此基础上,给出一些关于大跨度复杂钢结构施工的建议和意见,为施工力学学科的研究和发展提供了参考.
英文摘要：
Following the economic development, the large-span spatial structure tends to become more and more complex. The impact of construction process can not be neglected. The construction mechanic combined with structure mechanic and construction technology. It is necessary to analyze the internal force and deformation of three large-span complex steel structures in the construction process by using the method of construction mechanics. The result from theory and practice were compared. The analytical results show that construction mechanic can be used in selecting and guiding the construe tion to guarantee the construction safety. On this basis, the paper also gives some suggestions and comments about con struction of the large span complex structure. These results provide a reasonable basis for the further development of con- struction mechanics and engineering application.
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