Alele Uverstăţ d Orde Fsul: Proteţ Medulu Vol. XIII 00 THEORETICAL AND COMPARATIVE STUDY REGARDING THE MECHANICS DISPLASCEMENTS UNDER THE STATIC LOADINGS FOR THE SQUARE PLATE MADE BY WOOD REFUSE AND MASSIF WOOD Mrus Şer Fete Grel Chereg* *Uverst of Orde Fult of Evroetl Proteto 6 Ge. Mgheru St. 00 Orde; Ro Astrt I ths oprtve stud the oth plte hve the se retgulr surfe d thess g. Ths pper represets theoretl d oprtve stud de t to ot the pprote roots for the stt dspleet. Ke words: Sure refuse ssf plte spl supported ethod dspleet. INTRODUCTION For the plte de the refuse wood the lulus hve ee de slrl whh sotrop plte usg the vrtol Rtz ethod. The oth pltes hve spl supported ll the edges d re lodg wth uforl fores hvg the test. The Posso oeffets s for the oth plte 0 The Rtz ethods osst seletg sutle fte seres epresso of the defleto whh stsfes the geoetrl oudr odtos d stsfto of the dfferetl euto oto s ot reured. We use for the defleto epresso: w X Y Where: - X Y represets the uow oeffets oted fro the u totl eerg prple d the pproprte dspleet futos whh dvdull stsf t lest geoetrl oudr odtos. 6
MATERIALS AND METHODS We osder two retgulr pltes hvg the desos 000 000 loded uforl fores hvg the weght test.. The tls vlues for the ssf wood plte re: 6 dn E 0 00 5 dn G 00550 0 g 05 The tls vlues for the wood refuse plte re: 5 dn E 00 0 g 05 Where: E Youg s odulus. g thess. the Posso oeffets. The oudr odtos for the pltes wth ll sdes spl supported re: w 0 M 0 for 0 w 0 M 0 for 0 The vrtol Rtz ethods osst pplto of the u potetl eerg theor. the totl potetl eerg of the plte. We use for defleto the pprote epresso: Where: w f X f Y 69 X Y
X Y Represets futos who stsfes the geoetrl oudr odtos d losel pprotes the shpe. For the pltes wth ll sdes spl supported the shpe futos hve ee hoose le produt etwee two trgooetrll futos hvg dstt vrles. We represets the shpe futos s doule fte seres: w s s Usg the u eerg ethod t e deterted the uow oeffets. Solvg ler lger sste ot fro the u odtos 0 result the oeffets. 0 Solutos for the ssf wood plte d refuse wood plte The deforto eerg s gve the relto etwee totl eerg d ehl wor: W U W str eerg. U Ket eerg. D W A w w dd D W s s dd 0 0 The frst two dervtes of defleto gve the vrles re:\ w w w os s s s s os 70
7 w s s Wth the ssupto tht: 0 s s 0 s s the plte deforto eerg epresso s: D W d d dd dd dd w U A A 0 0 0 0 s s s s s s For: 35... 35... the epresso for ehl wor s: U Replg to the eerg epresso we ot: D D the plte rgdt. 3 g E D
Usg the odtos 0 results the eutos sste: D - 0 6 6 D For ssf wood plte the plte rgdt s: 0565 0 9 D dn d for the wood refuse plte D 03650 dn The lulus for the u defleto vlues the ddle of the pltes ws de for d t: 50 7 50 s s 6 w 6 D The oth pltes re loded uforl fores hvg the test. Also the weght wor le uforl fores o the volue of eh plte. w refuse wood plte defleto. w ssf wood plte defleto. refuse wood dest. ssf wood dest. Kg 600 3 Kg 900 3 I oorde wth superposto prple the defletos for eh pltes hvg uforl lodg re:
w 0 w 0 DISCUSSIONS AND CONCLUSIONS We ot for the dspleet the eter of the refuse wood plte dtted vlue whh t e lulted the efforts d the teso fro ross seto of the plte. Usg the plte de refuse wood the oluso re: - the pltes e use for the lght ostrutos to heve the floors. - redue the weght of the ostruto; - redue the pre of uldg; - e heve lot of sze d hve eoo effet. Hvg the u vlues for defletos the ddle of the pltes e estlsh the dgerous setos d lso the setols efforts edg oets. Ths oprtve studes represets thets ode to solve the plte defletos d gve us soe forto for the who help us to hoose the deute terls d the epted lodg thus to ressts wthout the posslt of the re. REFERENCES. Bors I 007 Aplt le prolee de vlor propr e ostrutlor Edtur U.T.Pres. Clu-Npo 73