详情

原文传递 LRFD DESIGN CRITERIA FOR COTTON DUCK PAD BRIDGE BEARING.

题名：	LRFD DESIGN CRITERIA FOR COTTON DUCK PAD BRIDGE BEARING.
作者：	Roeder-CW
关键词：	American-Association-of-State-Highway-and-Transp-Officials; Bridge-bearing-pads; Cotton-duck-pads; Load-and-Resistance-Factor-Design; Recommendations-; Rotation-; Specifications-; Stiffness-
摘要：	Cotton duck pads (CDP) are preformed elastomeric pads consisting of thin layers of elastomer interlayered with layers of cotton duck fabric. CDP are known to be quite stiff and to have large compressive load capacity. Because of this great stiffness, the translational movement and rotational capacity of CDP have been severely limited. Very few tests have been performed on these pads to examine their behavior. Although CDP are permitted significant compressive load capacity in the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) and Standard Specifications, they are allowed virtually no translational movement or rotational capacity in these same specifications. The AASHTO limitation on rotation is very severe, because it makes difficult the accommodation of construction tolerances with CDP applications. The severity of this rotational limit is the primary focus of this research study. The study evaluated existing proprietary data and developed improved recommendations for the AASHTO Specifications. The recommended improvements in LRFD format are included in Appendices A and B.
总页数：	NCHRP Web Document 24. 2000/03. pp43 (13 Fig., 7 Ref., 2 App.)
报告类型：	科技报告