2015/10/3 3.1.3 Load combinations 3.1.4 Nominal combination in tall building design Without earthquake action S=Sax+Suw+WcSox S=YoSak+Wol@S@+W.Y.S.x S<C S<R With earthquake action S=YaSae +YaSm +7pSm +W7.Su d limiting value under SLS S<RIYE eleration. stress and etc. 3.1.5 Quasi-permanent combination 3.2 Vertical loads S=Sax+Sou+∑y,S 3.2.1 Permanent loads (Dead loads) S<C 32 2 Variable loads (Live loads) 3.2.1 Dead loads Dead loads-weight of materials 3.2.1 Dead loads S.-SyaSu++.Su 1)Weight of bearing structure YS,SR (Units:kN or kN/m) Partial safety factor of gravity load oBeams .=12y=35 oColumns When dead loads are favor able Shear walls a=10a=0g Bracings Note:Every load item shall be considered,and dont over-l 本课件版权归作者所有，仅供个人学习使用，请勿转载。2015/10/3 2 3.1.3 Load combinations in tall building design  Without earthquake action  With earthquake action / G GE Eh EhK Ev EvK w w wK E S S S S S S R            RS SSSS G GK QQ QK ww wK    3.1.4 Nominal combination Applicable to SLS; C — stipulated limiting value under SLS， such as deflection、crack、amplitude of vibration、acceleration、stress and etc. CS SSS SQiK n i GK KQ Ci   2 1  3.1.5 Quasi-permanent combination CS SSS SQiK n i GK KQ qi   2 1  3.2 Vertical loads 3.2.1 Permanent loads （Dead loads） 3.2.2 Variable loads （Live loads） 3.2.1 Dead loads Dead loads —— weight of materials  Partial safety factor of gravity load  When dead loads are favorable: Note：Every load item shall be considered, and don’t over-loading . , . G G     1 2 1 35 . , . G G     1 0 0 9 j j 1 1 1 i 1 i m n d G G K Q L Q K Ci Q L Q K j 1 i 2 0 d d S S S S S R                3.2.1 Dead loads 1）Weight of bearing structure （Units：kN or kN/m )  Beams  Columns  Shear walls  Bracings 本课件版权归作者所有，仅供个人学习使用，请勿转载