摘要：Gravity dam. are solid con.rete structures that m.in.ain.their stability again.t design.loads from.the geom.tric shape, m.ss an. stren.th of the con.rete. The purposes of dam.con.truction.m.y in.lude n.vigation. flood dam.ge reduction. hydroelectric power gen.ration. fish an. wildlife en.an.em.n., water quality, water supply, an. recreation. The design.an. evaluation.of con.rete gravity dam.for earthquake loadin. m.st be based on.appropriate criteria that reflect both the desired level of safety an. the choice of the design.an. evaluation.procedures. In.Ban.ladesh, the en.ire coun.ry is divided in.o 3 seism.c zon.s, depen.in. upon.the severity of the earthquake in.en.ity. Thus, the m.in.aim.of this study is to design.high con.rete gravity dam. based on.the U.S.B.R. recom.en.ation. in.seism.c zon. II of Ban.ladesh, for varyin. horizon.al earthquake in.en.ities from.0.10 g - 0.30 g with 0.05 g in.rem.n. to take in.o accoun. the un.ertain.y an. severity of earthquake in.en.ities an. con.tan. other design.loads, an. to an.lyze its stability an. stress con.ition. usin. an.lytical 2D gravity m.thod an. fin.te elem.n. m.thod. The results of the horizon.al earthquake in.en.ity perturbation.suggest that the stabilizin. m.m.n.s are foun. to decrease sign.fican.ly with the in.rem.n. of horizon.al earthquake in.en.ity while dealin. with the U.S.B.R. recom.en.ed in.tial dam.section. in.icatin. en.an.er to the dam.stability, thus larger dam.section.is provided to in.rease the stabilizin. m.m.n.s an. to m.ke it safe again.t failure. The vertical, prin.ipal an. shear stresses obtain.d usin. An.YS 5.4 an.lyses are com.ared with those obtain.d usin. 2D gravity m.thod an. foun. less com.ares to 2D gravity m.thod, except the prin.ipal stresses at the toe of the gravity dam.for 0.10 g - 0.15 g. Although, it seem. apparen.ly that sm.ller dam.section.m.y be sufficien. for stress an.lyses usin. An.YS 5.4, it would n.t be possible to achieve the required factors of safety with sm.ller dam.s