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?ijÁººÅ 1 2 3 4

Öµ ±í3-4 e£¨m£© 7.7 7.7 7.7 7.7 ?i1 0.415 0.332 0.249 0.1662 ?i8 -0.165 -0.082 -0.0075 -0.0836 ÁººÅ ÔÚÆû³µºÉÔØ×÷ÓÃϵķֲ¼ÏµÊý 1 2 3 4 0.37 0.3 0.23 0.146 0.302 0.25 0.2 0.12 0.253 0.216 0.18 0.095 0.185 0.168 0.15 0.065 0.136 0.133 0.129 0.0419 0.068 0.085 0.1 0.0141 ÈËȺ×÷ÓÃϵķֲ¼ÏµÊý -0.0195 -0.0482 0.423 0.05 0 0.3374 0.079 0.028 0.252 / / 0.17 13

mcq?0.5¡Á1ºÅÁº 1³µµÀ£º£¨0.37+0.302+0.253+0.185+0.136+0.068-0.0195-0.0482£©

¡Á0.67=0.44 2³µµÀ£ºmcq?0.555 ÈËȺmcr?0.423

mcq?0.5¡Á2ºÅÁº 1³µµÀ £º£¨0.3+0.25+0.216+0.168+0.133+0.085+0.05£©¡Á0.67=0.4

2³µµÀ£ºmcq?0.467 ÈËȺmcr?0.3374

3ºÅÁº 1³µµÀ £ºmcq?0.5¡Á£¨0.23+0.2+0.18+0.15+0.129+0.1+0.079+0.028£©¡Á

0.67=0.37 2³µµÀ mcq?0.386 ÈËȺmcr?0.252

mcq?0.5¡Á4ºÅÁº 1³µµÀ£º£¨0.146+0.12+0.095+0.065+0.0419+0.0141£©¡Á0.67=0.16

2³µµÀ£ºmcq?0.213 ÈËȺmcr?0.17

2) Ö§µãµÄºÉÔغáÏò·Ö²¼ÏµÊým

ÈçÉÏͼËùʾ £¬°´¸Ü¸ËÔ­Àí·¨»æÖƺÉÔغáÏòÓ°ÏìÏß²¢½øÐв¼ÔØ Ôò»îÔغáÏò·Ö²¼ÏµÊý¼ÆËãÈçÏÂ

1ºÅÁº moq?0.5¡Á0.9048=0.4524 mor?1.09

2ºÅÁº moq?0.5¡Á£¨0.545+0.6364+0.0454£©=0.6134 mor?0.091 3ºÅÁº moq?0.5¡Á£¨0.364+0.9545+0.227£©=0.77275 mor?0 4ºÅÁº moq?0.5¡Á£¨0.773+0.6364£©=0.7047 mor? 0

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ºáÏò·Ö²¼ÏµÊý»ã×Ü±í ±í3-5 ºÉÔØÀà±ð Æû³µ ÈËȺ 1ºÅÁº 2ºÅÁº 3ºÅÁº 4ºÅÁº mc 0.55 0.423 m0 0.601 1.09 mc 0.461 0.3374 m0 0.6134 0.09 mc 0.386 0.252 m0 0.773 0 mc 0.213 0.17 m0 0.705 0 3.2.3 ¼ÆËã»îÔØÄÚÁ¦

ÔÚ»îÔØÄÚÁ¦¼ÆËãÖУ¬±¾Éè¼Æ¶ÔÓÚºáÏò·Ö²¼ÏµÊýµÄÈ¡Öµ×÷ÈçÏ¿¼ÂÇ£º¼ÆËãÖ÷Áº»îÔØÍä¾Øʱ£¬¾ù²ÉÓÃÈ«¿çͳһµÄºáÏò·Ö²¼ÏµÊýµÄ½Ï´ó×ø±êλÓÚÇÅ¿çÖв¿£¬¹ÊÒ²°´²»±ä»¯µÄ

mc£¬¼øÓÚ¿çÖкÍËÄ·Öµã¼ôÁ¦Ó°ÏìÏß

mcÀ´¼ÆËã¡£ÇóÖ§µãºÍ±ä»¯µã½ØÃæ»îÔØ

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1) ¼ÆËã¿çÖнØÃæ×î´óÍä¾Ø, ÏÂͼʾ³ö¿çÖнØÃæÄÚÁ¦¼ÆËãͼʾ:

1+u =1.238 pk?280KN 1.2¡ÁPk?1.2*280?336KN Q=10.5 KN

¶ÔÓÚÆû³µºÉÔØ:

1ºÅÁº Qmax?(0.5¡Á0.5¡Á28.66¡Á0.5+1.2¡Á280¡Á0.5)¡Á0.555¡Á1.238=141.3KN

Mmax?(0.5¡Á28.66¡Á7.5¡Á10.5+280¡Á7.5)¡Á0.555¡Á1.238=2218.3 KN.M

2ºÅÁº Qmax?£¨0.5¡Á0.5¡Á28.66¡Á0.5¡Á10.5+1.2¡Á280¡Á0.5£©¡Á0.41.238

=118.88 KN

15

Mmax?(0.5¡Á28.66¡Á7.5¡Á10.5+280¡Á7.5)¡Á 1.238¡Á0.46

=1866.54 KN.M

3ºÅÁº Qmax?(0.5¡Á0.5¡Á28.66¡Á0.5+1.2¡Á280¡Á0.5)¡Á1.238¡Á0.386=98.26 KN

Mmax?(0.5¡Á28.66¡Á7.5¡Á10.5+280¡Á7.5)¡Á 1.238¡Á0.386=1542.8 KN.M

4ºÅÁº Qmax?(0.5¡Á0.5¡Á28.66¡Á0.5+1.2¡Á280¡Á0.5)¡Á1.238¡Á0.213=54.2 KN

Mmax?(0.5¡Á28.66¡Á7.5¡Á10.5+280¡Á7.5)¡Á 1.238¡Á0.213=851.33 KN.M

¶ÔÓÚÈËȺºÉÔØq=1.8¡Á3=5.4 KN/M

1ºÅÁº £º Mmax?0.125¡Á0.423¡Á5.4¡Á28.662=234.53KN.M

Qmax?0.5¡Á0.5¡Á28.66¡Á0.5¡Á0.423¡Á5.4=8.2KN

2ºÅÁº Mmax?0.125¡Á5.4¡Á28.662¡Á0.337=186.85

Qmax?0.5¡Á0.5¡Á28.66¡Á0.5¡Á5.4¡Á0.337=6.52

3ºÅÁº Mmax?0.125¡Á5.4¡Á28.662¡Á0.252=139.72

Qmax?0.5¡Á0.5¡Á28.66¡Á0.5¡Á5.4¡Á0.252=4.875

4ºÅÁº Mmax?0.125¡Á5.4¡Á28.662¡Á0.17=94.26

Qmax?0.5¡Á0.5¡Á28.66¡Á0.5¡Á5.4¡Á0.17=3.3

2) ÇóËÄ·Öµã½ØÃæµÄ×î´óÍä¾ØºÍ×î´ó¼ôÁ¦:

¶ÔÓÚ³µµÀºÉÔØ:

16