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。

本文结合上海植物园展览温室屋顶铝合金网架工程，对铝合金压杆进行了试验研究，分析了材料特性、初始弯曲、初始偏心和截面形状等因素对铝合金压杆极限承载力的影响，最后在试验结果和数值计算的基础上得出了对称截面铝合金挤压型材压杆的稳定系数，并和欧洲建议、美国规范及上海市规程的稳定系数进行了比较。

阐明了斜拉索及塔柱的计算问题，数值计算、分析了斜拉网壳结构的动力性能问题，并与网壳结构计算结果进行了对比。计算分析表明，斜拉网壳结构频谱密集，与网壳结构的对应振型差别很大；斜拉索的存在大大提高了网壳结构的刚度，明显改变了网壳结构动力性能；作用于结构上的质量大小对结构的自振频率影响明显。

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。