?2?=VS/(I tw?=30000*402730/?110100000*6?=18.28 MPa?(10kN/m x 6m?/(119+0.5+0.5)?=0.5kN=500N?1.?1?2?3”?1232.?3.?S11?1?1?PKPM?PKPM?3 PKPM?6?+?1.2.?+1.4?
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