·¢²¼Ê±¼ä : ÐÇÆÚÁù ÎÄÕ¿ۼþʽ½ÅÊּܼÆËãÊé¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁ
µÚÒ»ÖÖÇé¿ö
Óɿɱä¿ØÖƵÄ×éºÏ£º
N5=1.2¡Á[G1k+(G2k+G3k)¡Áh]¡Ála¡Álb+1.2¡ÁH¡Ágk+1.4¡Á[(Qk+¦ÊQk)¡Ála¡Álb+0.6¡ÁNwk]
=1.2¡Á(0.2+(24+1.1)¡Á350¡Á0.001)¡Á0.9¡Á0.8+1.2¡Á3.3¡Á0.176+1.4¡Á((2+1.35¡Á0.5)¡Á0.9¡Á0.8+0.6¡Á0.134)=11.268kN
ÓÉÓÀ¾ÃºÉÔØ¿ØÖƵÄ×éºÏ£º
N6=1.35¡Á[G1k+(G2k+G3k)¡Áh]¡Ála¡Álb+1.35¡ÁH¡Ágk+1.4¡Á[0.7¡Á(Qk+¦ÊQk)¡Ála¡Álb+0.6¡ÁNwk]
=1.35¡Á(0.2+(24+1.1)¡Á350¡Á0.001)¡Á0.9¡Á0.8+1.35¡Á3.3¡Á0.176+1.4¡Á(0.7¡Á(2+1.35¡Á0.5)¡Á0.9¡Á0.8+0.6¡Á0.134)=11.517kN
N=max£¨N5£¬N6£©=max(11.268,11.517)=11.517kN ¦´0¡ÁN/(¦ÕA) f=205N/mm2
=1¡Á11.517¡Á1000/(0.231¡Á4.89¡Á100)=102.089N/mm2
¡Ü
Âú×ãÒªÇó
µÚ¶þÖÖÇé¿ö
Óɿɱä¿ØÖƵÄ×éºÏ£º
N7=1.2¡Á[G1k+(G2k+G3k)¡Áh]¡Ála¡Álb+1.2¡ÁH¡Ágk+1.4¡Á(Qk+¦ÊQk)¡Ála¡Álb =1.2¡Á(0.2+(24+1.1)¡Á350¡Á0.001)¡Á0.9¡Á0.8+1.2¡Á3.3¡Á0.176+1.4¡Á(2+1.35¡Á0.5)¡Á0.9¡Á0.8=11.156kN
ÓÉÓÀ¾ÃºÉÔØ¿ØÖƵÄ×éºÏ£º
N8=1.35¡Á[G1k+(G2k+G3k)¡Áh]¡Ála¡Álb+1.35¡ÁH¡Ágk+1.4¡Á0.7¡Á(Qk+¦ÊQk)¡Ála¡Álb =1.35¡Á(0.2+(24+1.1)¡Á350¡Á0.001)¡Á0.9¡Á0.8+1.35¡Á3.3¡Á0.176+1.4¡Á0.7¡Á(2+1.35¡Á0.5)¡Á0.9¡Á0.8=11.404kN
N=max£¨N7£¬N8£©=max(11.156,11.404)=11.404kN
¦´0¡ÁN/(¦ÕA)+¦´0¡ÁMw/W=1¡Á11.404¡Á1000/(0.231¡Á4.89¡Á100)+1¡Á0.002¡Á1000/5.08=101.472N/mm2¡Üf=205N/mm2
Ò³½Å
Âú×ãÒªÇó
Æß¡¢¿Éµ÷ÍÐ×ùÑéËã
°´ÉϽڼÆËã¿ÉÖª£¬¿Éµ÷ÍÐ×ùÊÜÁ¦N=12.164kN¡Ü[N]=30kN
Âú×ãÒªÇó
°Ë¡¢¼ÜÌ忹Ç㸲ÑéËã
¸ù¾Ý¡¶½¨ÖþÊ©¹¤½ÅÊּܰ²È«¼¼Êõͳһ±ê×¼¡·£¨GB51210£©ÖÐ6.2.17Ìõ¹æ¶¨£¬ÎÒÃǼÆË㿹Ç㸲ʱ°´×î²»Àû¹¤¿ö¿¼ÂÇ£¬¼´¼ÜÌåÉÏÎÞ¼¯ÖжѷÅÎïÁÏ£¬¿¹Ç㸲Á¦¾Ø½ö¿¼ÂÇÄ£°åÖ§¼Ü¼°¸½¼þ×ÔÖغͶ¥²¿Ä£°åµÈÎïÁÏ×ÔÖØ¡£
Ôò¿¹Ç㸲ÅжϹ«Ê½ÈçÏ£º
¼ÜÌå×ÔÖØ£ºGZ=H¡Ágk=3.3¡Á0.176=0.58kN
Òò£ºGZ /(la¡Álb)+G1k=0.58/(0.9¡Á0.8)+0.2=1.006kN/m2
3¦´0¡ÁMTk/[(n¡Álb)2¡Ála]=3¡Á1¡Á1.002/((6¡Á0.8)2¡Á0.9)=0.145kN/m2 ¹Ê£ºGZ/(la¡Álb)+G1k>3¦´0¡ÁMTk/[(n¡Álb)2¡Ála]
Âú×ãÒªÇó
Ò³½Å