Basic Loads Cases
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The document defines various types of loads that should be considered in structural analysis, including dead loads, live loads, wind loads, and earthquake loads. It provides details on how to apply these loads in both positive and negative directions of the X and Z axes. It also lists load combinations that should be analyzed according to Indian standards, including combinations for limit states of collapse and serviceability. The load combinations include factors for dead, live, wind, and earthquake loads.
Basic Loads Cases
- 1. Basic Loads 1) EQX (Earthquake force in X direction) a. EQX (+) (in increasing direction of X axis) b. EQX (-) (in decreasing direction of X axis) 2) EQZ (Earthquake force in Z direction) a. EQZ (+) (in increasing direction of Z axis) b. EQZ (-) (in decreasing direction of Z axis) 3) Dead Load a. Nodal Load b. Line Load c. Floor Load d. UDL/ UVL etc. 4) Live Load a. Floor Load 5) WLX (+) a. WLX (+) (in increasing direction of X axis) 6) WLX (-) a. WLX (-) (in decreasing direction of X axis) 7) WLZ (+) a. WLZ (+) (in increasing direction of Z axis) 8) WLZ (-) a. WLZ (-) (in decreasing direction of Z axis) Load Combinations: (As per IS 456:2000 Table No. 18 (pg. No. 68)) Sr. No. Load combination FOR LIMIT STATE OF COLLAPSE FOR LIMIT STATE OF SERVICEABILITY DL LL WL/EQ DL LL WL/EQ 1 DL + LL 1.5 1.5 - 1.0 1.0 - 2 DL + WL/EQ 1) DL contributing to stability 0.9 - 1.5 1.0 - 1.0 2) DL assisting over turning 1.5 - 1.5 1.0 - 1.0 3 DL + LL + WL/EQ 1.2 1.2 1.2 1.0 0.8 0.8
- 2. FOR LIMIT STATE OF SERVICEABILITY (STAAD Pro.) FOR LIMIT STATE OF COLLAPSE 1) DL + LL 2) DL + WL a. DL + WLX (+) b. DL + WLX (-) c. DL + WLZ (+) d. DL + WLZ (-) 3) DL + EQ a. DL + EQX (+) b. DL + EQX (-) c. DL + EQZ (+) d. DL + EQZ (-) 4) DL + 0.8 LL + 0.8 WL a. DL + 0.8 LL + 0.8 WLX (+) b. DL + 0.8 LL + 0.8 WLX (-) c. DL + 0.8 LL + 0.8 WLZ (+) d. DL + 0.8 LL + 0.8 WLZ (-) 5) DL + 0.8 LL + 0.8 EQ a. DL + 0.8 LL + 0.8 EQ X (+) b. DL + 0.8 LL + 0.8 EQ X (-) c. DL + 0.8 LL + 0.8 EQ Z (+) d. DL + 0.8 LL + 0.8 EQ Z (-) 1) 1.5 DL + 1.5 LL 2) 0.9 DL + 0.9 WL a. 0.9 DL + 1.5 WLX (+) b. 0.9 DL + 1.5 WLX (-) c. 0.9 DL + 1.5 WLZ (+) d. 0.9 DL + 1.5 WLZ (-) 3) 0.9 DL + 0.9 EQ a. 0.9 DL + 1.5 EQ X (+) b. 0.9 DL + 1.5 EQ X (-) c. 0.9 DL + 1.5 EQ Z (+) d. 0.9 DL + 1.5 EQ Z (-) 4) 1.5 DL + 1.5 WL a. 1.5 DL + 1.5 WLX (+) b. 1.5 DL + 1.5 WLX (-) c. 1.5 DL + 1.5 WLZ (+) d. 1.5 DL + 1.5 WLZ (-) 5) 1.5 DL + 1.5 EQ a. 1.5 DL + 1.5 EQ X (+) b. 1.5 DL + 1.5 EQ X (-) c. 1.5 DL + 1.5 EQ Z (+) d. 1.5 DL + 1.5 EQ Z (-) 6) 1.2 DL + 1.2 LL + 1.2 WL a. 1.2 DL + 1.2 LL + 1.2 WLX (+) b. 1.2 DL + 1.2 LL + 1.2 WLZ (-) c. 1.2 DL + 1.2 LL + 1.2 WLX (+) d. 1.2 DL + 1.2 LL + 1.2 WLZ (-) 7) 1.2 DL + 1.2 LL + 1.2 EQ a. 1.2 DL + 1.2 LL + 1.2 EQ X (+) b. 1.2 DL + 1.2 LL + 1.2 EQ Z (-) c. 1.2 DL + 1.2 LL + 1.2 EQ X (+) d. 1.2 DL + 1.2 LL + 1.2 EQ Z (-)