Equivalent transform from the force-densities of cable nets to the stresses of membrane elements

Qi-Lin Zhang, Li-Xin Chen and Xiao-Qun Luo: College of Civil Engineering, Tongji University, 1239 Sipin Road, Shanghai 200092, P. R. China <br />Zong-Lin Yang: Architectural Design and Research Institute, Tongji University, 1239 Sipin Road, Shanghai 200092, P. R. China