ṹêӹ̹
JSGF19-2000
    1÷Χ
    ڽṹӹ̡Ӳ㡢졢ϻᣬ磺¥塢ͨ¥ݡǽֲعԼ͸ֲϹ̽ճᡣռêλÿˮƽбǶȣôڸ״̬£>60棩ĸֽṹԼǿȵȼC20ĸֹʹãڳʪʩ
    2
    ṹһֳ¹̻ľԺܼ˫ݻ͸߷ӾۺṹСJGNETWSJJC͵Ʒ֣ڽṹзSIKADURʿHILTIƷ֡йϣê̼ĽṹܱﵽҪ
          ǿȡ18MPa                ǿ>32MPa
          ѹǿ>79MPa                 ǿ>30MPa
    ͻճ᲻ۿӦڻĿǿȣճ̻ˮˮõĿѧʴõĿϻ
    3
    4ʩ
    4.1ṹӹê̼ʩ
    ӹ̱ƲŸݽṹӹ̸ݣйؼ淶нṹƣṹӹê񣬲ʩͼָֽʩƿɲй̽׼Э׼ṹع̼淶CECS25 ?90ƣҲֳͨʵݼʽʩƲο
    4.2ê̼
    һҪṹӦйʽҪ󷽿ʩ
    ê̼Nyê̽ǿȱ׼ֵʱNy
           Ny = cu ??? d ?L ?K
           Ny = yk ? ?? d 2/4)
    cu ê̼ճǿȣɰṹӹ̼淶CECS25 ?901 ?2ʹáMpa
    d  ê̼êֱmm
    L  ê̼êȣmm
    K  ϵʵê̼Լ0.95 ~ 1.1֮䶯
    yk ê̼êǿȱ׼ֵɰֽṹƹ淶GBJ10-89ѡá
    4.3֤ͨâ򼶸ֽJGNṹêʱê̼Ũȿɲ±1ѡã
1  ͡JGNṹê̼Ʋѡò
ê̼êֱ	14	16	18	20	22	25	32	
KN	52.0	68.0	86.0	106.0	128.0	165.0	272.0	
ê̹ȣmm	200	225	250	280	310	350	450	
ê׵׾mm	20	22	24	26	28	31	38	
êճmm2	8796.48	11309.76	14137.20	17592.71	21425.71	247489.00	45239.04	
ҪճǿȣMPa	5.91	6.01		5.91	5.97	6.00	6.01	
    *ṹͻ֮ճǿȣֳͨԣӦڱҪճǿֵѡãӦṹƷֻ޸Ʋ
    5Ҫ
5.1
    ͼֽҪѡӦˣһҲê6mm˳ӦȣֽܿλãλλӦȷ׼಻С20֣׵ӦҪҪﴦȷêͻճ̻ǰľԸ׵ֱȡλõָպϸ󷽿ɽµ
5.2
    ɿ׺Ŀ׵ÿѹˢ׵ڵķ۳ڷ۳Ӱճ棬ÿѹĴ飬Ȼˢˢ׵ֱ޷۳Ϊֹ
    5.3ϴ
    մбͪˢϴ׵ܱڣԱ֤ױṹճᣬͪӷ󣬼ʱѿ׵ֽȾá
    5.4ê
    ê̽˲ø˿ˢг⣬ֱκΪֹĳӦêê᳤ȣêӦմбͪˢϴһ飬ڸɾĻϱá
    5.5佺
    ṹʩ¶15桫25棬ʩ¶ȵı仯ͨʵ̻佺Ӧþȷļ磺ƽС5̨ӣȳƽƹ̻Ӧɾ˹࣬ʱճʺӰʩճһһƵĽṹҪ3040ȫꡣ
    5.6׵ע
    עճעذѿųêռṹǿҲƽʵתêųڿṹ׵ѶṹɾˮƽêӦעʸõƬ赲ê̼û֮ǰӦê֧ܣֹλƣȷλУɵê̼Ӧ̬1~3죬ʩҪ1졣
    6Ҫ
    6.1ԭϼ
6.1.1ǿȼģ
    ͼ210mm?0mm?60mm8Լп飬ϺNAt, t=N/AtΪĿǿȻھۿǿȣӦӦǰ1/3θߵбE = ?ΪĿģ?
    6.1.2ѹǿ
    ͼ3æ2530mmԲ25mm?5mm?0mmԼпѹ飬e =N/AΪĿѹǿȻھۿѹǿȡ
    ṹӦгϸ֤ͲƷ鱨棬עָԽӦ俹ǿȣģѹǿȺϸ󷽿ʹá
    6.2ê̼
    6.2.1ʩǰ飺ʩǰӦͬģԼԼ3μ飬ﵽμ飬ﵽҪ󷽿ʩӦֻơ
    6.2.2ʩ飺ʩиݹСȡԼԼΪ1/100Уһƻ飬һƻ飬ÿ鲻ϸ󷽿գӦǿʩ
    6.2.3ʩм飺ʩбÿ׵ȡ׾ߡλõļ飬ƫλﵽŨȵêӦͨƣвǿʱ׺ûͽṹǷܶȣêǰ뱣־ֹ״̬̻ǰϽײê̼һ12~24Сʱ¶ȶʩ豣ֻʩ¶ȼ¼
    6.2.4ê̼鷽
    ûоı׼ɲþ궨׵ѹǧﶥê̼пüͱֵê̼Ŀճǿȣ㹫ʽʽ
                                         Nyê̼
    ê̼ճǿFjm =  Uêܳ1mêêȣ
    ê̼êӦרõļƬêêܺãʹý˷㣬ܷʹá
    7ʩ֯
    7.1ݹС䱸ʩ豸ͶгɿҪʩп䱸һ̨̨лףݿ׾ȡǿȡλáʩȲͬ乤ЧҲͬԶһ̨Ϊһ飬ÿ̨һɣֱ30~40ףˮƽ20~30ף10~20ס
    7.2佺ס⡢êרŵİӣһ䱸4~6ˣˮҵͳһȣ佺2ˣ2ˣƽṹרòͼײ̨ʹá
    8ȫʩ
    Աи߿աҵʹûе豸عҡʡейذȫ涨⣬ע⣺
    8.1Ա뾭רҵѵýṹê̼Ĳ
    8.2ԱݹƷ簲ȫñȫԵסԵЬ羵ֵȣо
    8.3ּӦι̿ɿΧӦзˡûо籣װãϽ߸죬ṹֽɴ¹ʣ
    8.4豸Ӧϰȫõ涨Ӧнӵش籣װãϽ߸죬ṹֽɴ¹ʣ
    8.5ṹͪӦȱܣзˮʩϴ㵹Ӧָص㼯д
    8.6Ӧͨ磬㹻ȡ
