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综合现有张弦梁结构工程实例,张弦梁结构存在一些不足,如跨中处撑杆低垂,室内空间减小,易使人产生压抑感;从结构受力角度来讲,撑杆是受压构件,长细比过大会影响其稳定性,因此考虑在张弦梁结构下弦布设两道索即形成双层弦张弦梁结构形式;在较大风荷载作用下,大跨度张弦梁结构的抗风性能较差。在双层弦张弦梁结构的基础上布设抗风索(即抗风索双层弦张弦梁结构)来提高结构的抗风性能,采用ANSYS有限元软件详细分析对比了抗风索双层弦张弦梁结构与未布设抗风索的双层弦张弦梁结构的稳定性能。通过对比发现,布设抗风索的结构稳定性能有一定的提高。
Based on the existing example of the beam string structure project, there are some shortcomings of the beam string structure, such as the lowering of the struts in the middle section and the reduction of the interior space, Slenderness than the general assembly affect its stability, so consider the formation of double-chord string chord under the string-string structure of the two-stringed beam string structure; under the effect of larger wind loads, the long-span beam string wind resistance performance is poor. On the basis of double-string chord beam structure, wind-resistant cables (ie wind-resistant double-chord string chord beam structure) are arranged to improve wind-resistant performance of the structure. ANSYS finite element software is used to analyze and compare the structure of double- Stability of double - string chord beam structure without wind resistant cables. The comparison shows that the structural stability of wind-resistant cables is improved to a certain extent.