Single-Layer Reticulated Shells (SLRSs) have been widely used in the past few decades due to their attractive architectural shapes and good mechanical behavior. The stability of SI,RSs is often a dominant or control problem in structural design. In this paper, research on the stability of SLRSs carried out in the authors' research lab over the past two decades are described, emphasizing theoretical research work on nonlinear numerical techniques for stability analysis, numerical and experimental investigations of static and dynamic instability characteristics of SLRSs, and application of the achievements in practical engineering projects. Finally, additional topics regarding stability analysis and design of SLRSs are briefly discussed.

对两种几何特征的圆钢管空间相贯节点进行了静力单调和反复加载的实验研究，以作为进一步研究钢管桁架抗震性能的基础。设计了专用的加载装置以对试件中的杆件和节点施加较大内力。通过对5 试件的实验，得到了节点滞回特性曲线。研究揭示了这类节点塑性变形沿首次塑性开展方向累积的特点，并指出单调加载曲线可以基本包覆滞回曲线。实验表明，采用相贯节点的钢管结构，其滞回特性取决于节点的滞回行为。对给定节点在反复加载下的变形能力和耗能能力进行了量化评价。

基于钢材在反复荷载作用下的损伤累积力学模型（包括损伤变量D的计算公式,损伤对钢材屈服强度、弹性模量、强化系数的影响以及钢材考虑损伤累积效应的应力-应变滞回关系等）和损伤累积断裂准则,采用改进的数值积分方法对钢构件的滞回曲线进行了计算机仿真，并建立了实用的考虑损伤累积和断裂效应的钢构件恢复力模型。采用这一模型对具有损伤的空间钢框架结构的抗震反应进行分析，并得到了振动台模拟地震试验的验证。抗震分析方法的特点为：能够考虑损伤累积和裂纹效应的影响,能够计算构件的损伤程度，能够计算裂缝产生的时间、部位及其开展，以及能够对钢框架结构遭受多次地震时的情况作真实的反应分析。

In this paper, shaking table tests of two shallow reticulated shells under earthquake loading were described. Local and global dynamic instabilities were observed in the test and time-istory curves for stresses of members and nodal displacements were given respectively. It was shown that there were sudden changes in these curves, which were regarded as the signs of local and global dynamic instability. Based on test results, the law of structural dynamic instability was summarized, the definition of dynamic instability and several practical criteria proposed by the authors were illuminated. Finally, some calculation results from theoretical analyses of the two models under static and dynamic loading were given. By comparison of them, it can be seen that there are many common properties that reflect the stability behaviors and can be used to determine the state of static and dynamic stability of structures.

拱支网壳结构体系是在综合了网壳（网架）及拱结构等优点的基础上，构思出的一种新型大跨度空间杂交结构形式。在理论分析和模型试验研究的基础上，对该结构体系的力学性能进行了分析，并比较其经济性指标。研究结果表明，由于拱结构的参与，该杂交结构的受力性能得到明显改善，使得该结构体系具有更广阔的应用前景。