详情

原文传递 NONLINEAR FINITE ELEMENT ANALYSIS FOR THERMOPLASTIC PIPES.

题名：	NONLINEAR FINITE ELEMENT ANALYSIS FOR THERMOPLASTIC PIPES.
作者：	Zhang-C; Moore-ID
关键词：	THERMOPLASTICS-; BURIED-PIPES; LIMIT-STATES; DESIGN-; NONLINEAR-ANALYSIS; FINITE-ELEMENT-ANALYSIS; TIME-DEPENDENT-BEHAVIOR; HIGH-DENSITY-POLYETHYLENES; STRUCTURAL-ANALYSIS; PERFORMANCE-; PREDICTIONS-; STRUCTURAL-RESPONSE; COMPARISONS-; LABORATORY-TESTS; NONLINEARITY-; BACKFILLS-; SOIL-PROPERTIES; MATHEMATICAL-MODELS; FUTURE-RESEARCH
摘要：	Thermoplastic pipes are being used increasingly for water supply lines, storm sewers, and leachate collection systems in landfills. To facilitate limit states design for buried polymer pipes, nonlinear constitutive models have recently been developed to characterize the highly nonlinear and time-dependent material behavior of high-density polyethylene (HDPE). These models have been implemented in a finite element program to permit structural analysis for buried HDPE pipes and to provide information regarding performance limits of the structures. Predictions of HDPE pipe response under parallel plate loading and hoop compression in a soil cell are reported and compared with pipe response measured in laboratory tests. Effects on the structural performance of pipe material nonlinearity, geometrical nonlinearity, and backfill soil properties were investigated. Good correlations were found between the finite element predictions and the experimental measurements. The models can be used to predict pipe response under many different load histories (not just relaxation or creep). Work is ongoing to develop nonlinear constitutive models for polyvinylchloride and polypropylene to extend the predictive capability of the finite element model to these materials.
总页数：	Transportation Research Record. 1998. (1624) pp225-230 (1 Phot., 9 Fig., 12 Ref.)
报告类型：	科技报告