四分之三球穹顶单层网壳稳定性试验研究

本文对四分之三球体穹顶单层网壳进行了模型试验研究，网壳模型直径３ｍ，高２．３３ｍ，共有节点１５６个，杆件４４０根，荷载采用竖向荷载和水平荷载分级加荷，测得了在荷载作用下的节点位移及荷载与杆件轴力，杆件弯矩的关系。

A TEST STUDY ON THE STABILITY OF SINGLE LAYER BRACED DOME OF 3/4 SPHERE

A model of single layer braced dome of 3/4 sphere has been tested which is 3 m in diameter and 2.33 m in height,having 156 joints and 440 members and loaded by graded vertical and horizontal loads.The relationships of the loads with the axial forces of members or the bending moment of members,and the displacement of joints are measured.With a comparison made between the test results and the theoretical analysis,it is believed that the single layer braced dome has better stability,and the geodisic braced dome is of a rational grid form.On the other hand,a suggestion is made that the layers of the lower parts of the single layer braced dome of 3/4 sphere should be strengthened in design.Under the guidance of the theoretical analysis and the test results,this kind of structure has been used in the design of Tianjing Sicence and Technology Building with success.