J Shanghai Jiaotong Univ Sci ›› 2024, Vol. 29 ›› Issue (5): 831-844.doi: 10.1007/s12204-022-2472-z
张翔宇1, 王沙沙1, 龚景海1 , 邱国志1, 纪腾飞2
接受日期:
2021-09-15
出版日期:
2024-09-28
发布日期:
2024-09-28
ZHANG Xiangyu1 (张翔宇), WANG Shasha1 (王沙沙), GONG Jinghai1* (龚景海),QIU Guozhi1(邱国志),JI Tengfei2(纪腾飞)
Accepted:
2021-09-15
Online:
2024-09-28
Published:
2024-09-28
摘要: 应力分布确定对于膜结构在工程实践中的安全使用至关重要,然而现有的测量方法和分析方法难以获得准确的应力分布。提出了一种刚性膜法来确定膜应力分布,该方法通过扩大膜刚度,将平衡状态下的膜荷载施加到平衡状态的膜形状上,并进行非线性有限元分析。刚性膜法仅基于水荷载作用下膜结构的平衡形状和荷载分布,通过数值模拟反向获取膜应力分布,并确定了刚化膜面所需的模量大小和网格尺寸。通过比较该方法获得的应力分布与数值模拟结果之间的微小差异,验证了刚性膜法的准确性。实际工程中的平衡膜形状可以通过激光扫描系统进行扫描和重建,无需任何预处理,而荷载则由水位、内压等因素决定。基于实际膜面形状和水荷载分布,刚性膜法确定了平面膜承受积水试验中的实际应力分布,证实了该方法是一种仅通过膜形状和外部荷载分布就能确定应力分布的实用方法。
中图分类号:
张翔宇1, 王沙沙1, 龚景海1, 邱国志1, 纪腾飞2. 基于激光扫描系统的刚性膜法测定膜结构应力分布[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(5): 831-844.
ZHANG Xiangyu1 (张翔宇), WANG Shasha1 (王沙沙), GONG Jinghai1 (龚景海), QIU Guozhi1(邱国志), JI Tengfei2(纪腾飞). Rigid-Membrane Method for Determining Stress Distribution of Membrane Structure Based on Laser Scanner System[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(5): 831-844.
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