膜结构在暴雨积水时材料模型研究

doi:10.16183/j.cnki.jsjtu.2021.365

摘要/Abstract

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.

关键词: 膜结构, 积水, 膜材材料模型, 数值模拟, 变形预测

Abstract:

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.

Key words: membrane structure, water accumulation, membrane material model, numerical simulation, deformation prediction

中图分类号:

TU317

庞妍, 卿强, 王沙沙, 张翔宇, 龚景海. 膜结构在暴雨积水时材料模型研究[J]. 上海交通大学学报, 2023, 57(2): 213-220.

PANG Yan, QING Qiang, WANG Shasha, ZHANG Xiangyu, GONG Jinghai. Material Model of Membrane Structure in Rainstorm[J]. Journal of Shanghai Jiao Tong University, 2023, 57(2): 213-220.

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参考文献 15

[1]	中国工程建设标准化协会. 膜结构技术规程: CECS 158—2015[S]. 北京: 中国计划出版社, 2016.
	China Association for Engineering Construction Standardization. Technical specification for membrane structures: CECS 158—2015[S]. Beijing: China Planning Press, 2016.
[2]	于沁灵, 龚景海, 郭晓, 等. 涂层织物类膜材的拉伸试验及力学参数研究[J]. 空间结构, 2020, 26(4): 64-69.
	YU Qinling, GONG Jinghai, GUO Xiao, et al. Tensile test and mechanical parameters of coated fabric membrane[J]. Spatial Structures, 2020, 26(4): 64-69.
[3]	SHI T B, HU J H, CHEN W J, et al. Biaxial tensile behavior and strength of architectural fabric membranes[J]. Polymer Testing, 2020, 82: 106230. doi: 10.1016/j.polymertesting.2019.106230 URL
[4]	GAO C J, CHEN W J, SHI T B, et al. Response surface characterization for biaxial tensile properties of envelope fabrics under multiple stress ratios[J]. Composite Structures, 2019, 230: 111482. doi: 10.1016/j.compstruct.2019.111482 URL
[5]	GAO C J, CHEN W J, HU J H, et al. A new constitutive model on biaxial tensile behavior of architectural fabrics[J]. Polymer Testing, 2020, 87: 106519. doi: 10.1016/j.polymertesting.2020.106519 URL
[6]	卫东, 王臣, 向阳, 等. 建筑膜材的材性试验研究[J]. 空间结构, 2002, 8(1): 37-43.
	WEI Dong, WANG Chen, XIANG Yang, et al. Experimental study on material properites of structural fabric[J]. Spatial Structures, 2002, 8(1): 37-43.
[7]	孙战金, 张其林, 杨宗林. 采用数值计算进行膜材预张力测量方法初探[J]. 振动、测试与诊断, 2005, 25(1): 31-35.
	SUN Zhanjin, ZHANG Qilin, YANG Zonglin. Preliminary study on membrane pretension measurement by numerical calculations[J]. Journal of Vibration, Measurement & Diagnosis, 2005, 25(1): 31-35.
[8]	张其林, 倪佳女. 涂层织物类膜材弹性模量试验研究及有限元分析[C]// 第十二届空间结构学术会议论文集. 北京: 中国土木工程学会桥梁及结构工程分会空间结构委员会, 2008: 275-279.
	ZHANG Qilin, NI Jianü. Experimental research and finite element analysis of elastic modulus of coated fabrics[C]// The 12th Space Structure Academic Conference. Beijing, China: Spatial structure committee of bridge and structural engineering branch of china civil engineering society, 2008: 275-279.
[9]	黄赛帅, 陈务军, 董石麟. 飞艇囊体膜材弹性常数双向拉伸测试与分析方法[J]. 空间结构, 2011, 17(2): 84-89.
	HUANG Saishuai, CHEN Wujun, DONG Shilin. Bi-axial tensile test method and analytical algorithm of elastic constants for the airship envelope fabric[J]. Spatial Structures, 2011, 17(2): 84-89.
[10]	YANG B, YU Z L, ZHANG Q L, et al. The nonlinear orthotropic material model describing biaxial tensile behavior of PVC coated fabrics[J]. Composite Structures, 2020, 236: 111850. doi: 10.1016/j.compstruct.2019.111850 URL
[11]	张丽, 陈务军, 董石麟. PVDF/PES建筑织物膜力学性能单双轴拉伸试验[J]. 空间结构, 2012, 18(3): 41-48.
	ZHANG Li, CHEN Wujun, DONG Shilin. Mechanical properties analysis of architectural PVDF/PES fabrics with uni-tensile and bi-axial test[J]. Spatial Structures, 2012, 18(3): 41-48.
[12]	XU J H, ZHANG Y Y, WU M, et al. A phenomenological material model for PTFE coated fabrics[J]. Construction and Building Materials, 2020, 237: 117667. doi: 10.1016/j.conbuildmat.2019.117667 URL
[13]	WAKEFIELD D S. Engineering analysis of tension structures: Theory and practice[J]. Engineering Structures, 1999, 21(8): 680-690. doi: 10.1016/S0141-0296(98)00023-6 URL
[14]	DINH T D, REZAEI A, PUYSTIENS S, et al. A study of tension fabric membrane structures under in-plane loading: Nonlinear finite element analysis and validation[J]. Composite Structures, 2015, 128: 10-20. doi: 10.1016/j.compstruct.2015.03.055 URL
[15]	COELHO M, ROEHL D. A finite-strain elastoplasticity material model for ETFE membrane structures[J]. Computers & Structures, 2019, 217: 36-44. doi: 10.1016/j.compstruc.2019.03.007 URL

材料模型		E_w/ (kN·m^-1)	E_f/ (kN·m^-1)	ν_w	ν_f	G/ (kN·m^-1)
模型1		428.0	513.0	0.150	0.179	21.4
模型2	第一阶段	498.2	601.4	0.391	0.472	24.9
	第二阶段	410.2	495.8	0.120	0.145	20.5