LI Yuxue1,2,3, FENG Lirui1, LI Haiyun1,2,3, TIAN Yuji4
1.School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province, Shijiazhuang 050043, China;
3.Key Laboratory of Roads and Railway Engineering Safety Control of China Ministry of Education,Shijiazhuang Tiedao University, Shijiazhuang 050043, China；
4.Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing 100044, China
Abstract：Aiming at the problem of multiple target response need to be considered in the equivalent static wind load analysis for large-span roofs, corresponding to the wind-induced response of background component, resonance component and their coupling term(referred to as three-component),a stratified method for analyzing multiple target equivalent static wind load of large-span roofs is proposed. Firstly, based on energy equivalence and considering the all nodes response of the structure, the three-component multiple target equivalent static wind load expressions are deduced. Secondly, according to the contribution of the three-component response energy to the total response energy, the three-component energy contribution coefficient is defined, then, the three-component response hierarchical division of large-span roofs is realized, and for different hierarchical of the structure, the corresponding total equivalent static wind load combination method is formulated. Finally, taking the Beijing Olympic green tennis center stadium roof as an example, the three-component response hierarchical is divided. According to the division result, the total equivalent static wind load of the structure is combined, on this basis, the static response induced by the total equivalent static wind load is compared with the target response obtained from the frequency domain analysis, and founding the two are in good agreement, which indicate that the proposed method is effective and has engineering application value.
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