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Load distribution characteristics of...

Witmer, Ray Wesley, Jr.

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Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components./
作者:	Witmer, Ray Wesley, Jr.
面頁冊數:	363 p.
附註:	Adviser: Harvey B. Manbeck.
Contained By:	Dissertation Abstracts International57-12B.
標題:	Agriculture, Wood Technology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9716337
ISBN:	9780591242515

Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components.
Witmer, Ray Wesley, Jr.

Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components. - 363 p.

Adviser: Harvey B. Manbeck.

Thesis (Ph.D.)--The Pennsylvania State University, 1996.

Experimental and analytical investigations were conducted to quantify the load response of longitudinal stringer-transverse deck hardwood glued laminated (glulam) bridges and bridge components for three hardwood species: red maple, red oak and yellow poplar. Experimental investigation included: (1) determining the material properties of red maple; (2) determining the dowel bearing strength, the shear and withdrawal load and stiffness of hardwood glulam lag screw and deck clip connections for the three hardwood species; (3) determining the relative and absolute deflection of red maple glulam bridge deck panels; and (4) determining the partial composite action of red maple glulam t-beams. Analytical investigations included predicting, using the finite element modeling (FEM) analysis, the partial composite action of hardwood glulam t-beams and the live load deflection of hardwood glulam longitudinal stringer-transverse deck bridge beams.

ISBN: 9780591242515Subjects--Topical Terms:

1031154
Agriculture, Wood Technology.

Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components.
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100 1 $a Witmer, Ray Wesley, Jr. $3 1271214
245 1 0 $a Load distribution characteristics of hardwood glued-laminated timber bridges and bridge components.
300 $a 363 p.
500 $a Adviser: Harvey B. Manbeck.
500 $a Source: Dissertation Abstracts International, Volume: 57-12, Section: B, page: 7298.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1996.
520 $a Experimental and analytical investigations were conducted to quantify the load response of longitudinal stringer-transverse deck hardwood glued laminated (glulam) bridges and bridge components for three hardwood species: red maple, red oak and yellow poplar. Experimental investigation included: (1) determining the material properties of red maple; (2) determining the dowel bearing strength, the shear and withdrawal load and stiffness of hardwood glulam lag screw and deck clip connections for the three hardwood species; (3) determining the relative and absolute deflection of red maple glulam bridge deck panels; and (4) determining the partial composite action of red maple glulam t-beams. Analytical investigations included predicting, using the finite element modeling (FEM) analysis, the partial composite action of hardwood glulam t-beams and the live load deflection of hardwood glulam longitudinal stringer-transverse deck bridge beams.
520 $a The experimental results indicate that: (1) the red maple material properties determined from published mixed maple species were acceptable for use in calculations involving only red maple; (2) dowel bearing strength for the three laminated hardwood species agree with published values for solid sawn lumber; (3) shear loads for lag screw connections were correctly predicted by Yield Theory equations while shear loads for deck clip connections were overpredicted; (4) withdrawal loads for lag screw and clip connections were correctly predicted by NDS (AFPA, 1991) design equations for the three hardwood species; (5) shear load fatigue rate (due to cyclic displacement) for hardwood glulam connection members was dependent upon initial load; (6) relative deflection of red maple deck panels was dependent upon deck-to-deck connector type (dowels or bars) while absolute panel deflection was independent of connector type; (7) a 6.5% beam stiffness increase is achieved with the addition of unabutted deck panels while a 9% to 16% beam stiffness increase is achieved with the addition of abutted deck panels. The finite element modeling (FEM) results indicate that the FEM method adequately predicted the partial composite behavior of red maple glulam t-beams and the live load deflection of hardwood glulam longitudinal stringer-transverse deck bridge beams.
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