膜结构在暴雨积水时材料模型研究  

Material Model of Membrane Structure in Rainstorm

作　　者：庞妍 卿强 王沙沙 张翔宇 龚景海[1] PANG Yan;QING Qiang;WANG Shasha;ZHANG Xiangyu;GONG Jinghai(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2023年第2期213-220,共8页Journal of Shanghai Jiaotong University

摘　　要：在遭遇暴雨时,坡度比较小的膜面容易积水,准确模拟出此时膜面的变形有助于保障结构安全,现有研究采用的膜材线性本构模型不适用于模拟膜结构在暴雨下的变形.通过在膜结构上进行均布荷载加载试验,模拟膜面遭遇暴雨作用下的力学行为,获得结构积水时的变形形态.采用膜材线性与双折线本构模型,分别建立膜结构有限元模型并进行荷载分析,通过对比有限元模型和实际结构的变形,选取适合模拟膜结构在暴雨下变形的膜材本构模型.数值模拟结果显示:与采用线性本构模型模拟的结构变形相比,采用膜材双折线本构模型模拟出的结构变形更接近试验测得的变形.研究成果可为膜结构在暴雨积水作用下的膜材本构模型选用和分析计算提供参考.When encountering heavy rain,the membrane surface with a relatively small slope is easy to accumulate water.Accurately simulating the deformation of the membrane surface at this time will help ensure the safety of the structure.The linear constitutive model of membrane material used in existing research is not suitable for simulating the deformation of membrane structure in rainstorm.This study conducts a uniform load test on a membrane structure to simulate the mechanical behavior of the membrane surface in rainstorm and obtains the deformation form of the structure when water is accumulated.The linear constitutive model and the double broken line constitutive model of membrane material are used in the finite element model of the membrane structure for load analysis.By comparing the deformation of the finite element model and the actual structure,it selects the constitutive model suitable for simulating the deformation of the membrane structure in heavy rain.The numerical simulation results show that the structural deformation simulated by the double broken line constitutive model is closer to the deformation measured in the experiment than the linear constitutive model.The research results can provide a reference for the selection of the membrane constitutive model and the analysis of membrane structure in rainstorm.

关 键 词：膜结构 积水 膜材材料模型 数值模拟 变形预测 

分 类 号：TU317[建筑科学—结构工程]