Material Model of Membrane Structure in Rainstorm

doi:10.16183/j.cnki.jsjtu.2021.365

Abstract

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

CLC Number:

TU317

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.

Figures/Tables 17

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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