1、高空自由落体16?8Vol.16?M6?9No.6?JournalofChongtingInstituteofTechnology2002?12?JDec.2002?;1671-0924(2002)06-0037-01?E?42?y?(?a?p?.I?400050)?:?t?=1?t?E?t?h.?.?:?t?.?E?,?J?.?:0314?N?:A?G?a?,.?u?K?%?4?:?%?G?%?,?0?H?.?a?G?9?R?a?;?C?a?E?=?=?o?=?,.?t?f?H?n?p?.?G?.?t?%?.?s?=6?%?=?V?.?G?=?V?e?G?n?a?9?R9?;?E?t?=?=
2、?(?n?%?a?f?=?V?=?=?)?a?n?x?t?t?t?.?E?G?=?V?E?G?7?t?(?.?124y?GR?GR(1)?E?t?=?V?9?x?%A?f.?h?,R*0M?x?=?V?H?To?Gf,G?x?N?u?e?8?.?a?C?.?q?E?n?a?0?(6)?h?q?=6(6)?h?*?/?K?a?v?q?;?h?x?.?G?5?a?x?(6)?h?q?F?a?x?G?=n1?a?.R?n?q?F?(?E?t?9?R9?;?ax=n1?f?g?).?=n1?a?f?(6)?h?,?/?v?.?B?,t=100,?(?h?(?33?f?r.?a(6)?h?T?r=2V?
3、V-?N,?x?%?(?h=62fR(r-R)(2)?=?a?t?a?9?;?r=2731.4.?E?f?x?a?t?0?w?.?E?.?X?v?drdt(3)?E?E?JdrV(4)?.(2)?h?(4)?h.?(5)?T(5)?h?a?f?a?r=aR(?x?t?G?f,?s?1)?a?7?2?.?=?=?V?Ilk?C?r?2V7=+1.(2?1+2,/m.)(6)?h?,?r=8Rat?=6.=6=1X1vt(7)J?1+=1366.2,?C?%?.?0?*?*?%?n?r?.R?8.7X101m,?%?n?x?J?=?(3.85X10.)?22.6?f4y?8?r?n?a?s?l?(
4、?h?f?F?n?F:r=2731.4,.?1362.2,r?8.68X10m?5?G3?=6?a?=?V?b?E?n?hy=?a:.?%?8?G?h?u?K?=64y?:-10s,?u?8?G?h?a?a?490.,?u?,?E?t?h?F?.?r?=6.0351?a?1.0000768,y?r-R=(x-1)R=489.?a?E?h?G?=?V?b?x?B?G?a?W?S?t?a?x?F?.(?n?M40?)?/?L?92002-04?01?l?:?y?(1934-),?m(?)?a?UI?a?z?a?U?p?.?s?xt,4;.?a?0?=?9?Gf?9?Gf1996,(3),25-26
5、.?*CJl.?=?9?a2000,(8),27-29.=s?.?t?E?9?7?u?K?N?=s?.?=e?H?0?9?g?v?CJI.?s?x?a?a1999,(10),16-19.TheCauseandControloftheFissuresinCommercialConcreteGENGBao-hua,TANGJian-li,LUJian(DepartmentofMaterialScienceandEngianering,ChongqingUniversity,Chongqing400044,China)Ahatrwt,Thispaperstudiesandanalysesthecha
6、racteristicsofcommercialconcreteinChongqingandthefissureproblemsresultingfrompresent-A.meatlevel.Itholdsthatmeasuresshouldbetakentopreventfissuresfromhappeningto=6?a=6thesafetyandtheutilizingperformanceofbuildings.%ywor?:cotmnercialconcrete;fissure;cause;control=r?+?T?4?)=r?r?M37?)?B?a?a?r?.?E?=?=?(
7、?a=36X10W,?0?u?,r?a+R=(36+6.371)X10m?a?6.4;.?f?r?5?.?F?,r=12.26,4y?R?9?h?42?.6?.?F?,r=15.46,;=12?h?14?.5?.?x?u?8?G?E?h?a?Jt=45?.10?.?s?/?x?M?a?=6?0?E?t?s?t?E?.?n?u?.?8?0?G?r?E?t?h?f?x?E?G?=?V?b?%?F;?f?a?.(7)?h?,?=?V?R,?=?V?GfM?,?9?V?Gt.?J?,?E?h?=?9?V?r?.FreeFallingBodyinUpperAirLIUHuai-?T(DepartmentofBasicSciences,ChongqingInstituteofTechnology,Chongqing400050,China)Abstract,BasedontheLawofEnergyConservation.tluspapereduces?moreaccurateandmoregeneralizedformulaoffreefalling?a.Keyword,lawofenergyconservation,freefallingbody1?b?T?.?)
