详情

原文传递 METAL CULVERT RESPONSE TO LIVE LOADING: PERFORMANCE OF THREE-DIMENSIONAL ANALYSIS.

题名：	METAL CULVERT RESPONSE TO LIVE LOADING: PERFORMANCE OF THREE-DIMENSIONAL ANALYSIS.
作者：	Moore-ID; Taleb-B
关键词：	DEFORMATION-; FIELD-TESTS; FINITE-ELEMENT-METHOD; LIVE-LOADS; MATHEMATICAL-PREDICTION; METAL-ARCH-CULVERTS; METAL-CULVERTS; MOMENTS-MECHANICS; SHEAR-FAILURE; THREE-DIMENSIONAL-ANALYSIS; THRUST-
摘要：	A three-dimensional elastic procedure was used to examine the response of a 9.5-m span low-profile metal arch culvert to surface live load. Field tests featured a heavily loaded truck producing axle forces at conventional design limits. Culvert response was measured and analyzed at very low cover. The three-dimensional finite-element analysis for vehicle load provided good predictions of the magnitude and distribution of culvert deformations. Predictions of moment and thrust were reasonable, but the analysis neglects shear failure in the soil and this likely produced moments and thrusts directly under the wheel loads that were less than the field measurements. Three-dimensional analysis with backfill modulus reduced to compensate for the effect of shear failure in the soil below the vehicle produced thrust and moment values close to those measured in the field. A comparison with two-dimensional predictions of culvert response to live load revealed the importance of explicitly modeling the three-dimensional geometry of the vehicle. Plane-strain analysis with line-load equivalents, which give close to the correct crown deflection, produced thrust and moment estimates that were in error by factors of 9 and 3, respectively.
总页数：	Transportation Research Record. 1999. (1656) pp37-44 (7 Fig., 3 Tab., 9 Ref.)
报告类型：	科技报告