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对于给定的静定桁架,各只需满足强度和稳定条件,杆件截面面积为X_i≥N_i~p/[σ].其中N_j~p为杆件内力,[σ]为考虑了稳定条件的允许应力.
For a given statically determinate truss, each only needs to meet the strength and stability conditions, and the cross-sectional area of the bar is X_i ≥ N_i~p/[σ]. where N_j~p is the internal force of the bar, and [σ] is considered for the stability condition. Allow stress.