摘要
采用适合大跨隔震结构的损伤模型,对四种不同跨度的大跨隔震及非隔震网架结构进行多维多点激励下基于损伤的IDA分析,研究大跨网架结构和大跨隔震网架结构在小震、大震及超设防烈度地震下的损伤发展状况及损伤概率。结果表明:对于大跨非隔震结构,随着地震动强度的增加,钢结构屋盖的损伤逐步增加,但一般小于下部结构;对于大跨隔震结构,地震动强度较小时隔震层损伤大于其他各部分,且此时钢屋架损伤很小,地震动强度较大时,网架损伤逐步增长并大于下部构件。在超设防烈度地震作用下,大跨隔震结构的损伤依然较小,表明大跨隔震结构具有较好的抗震性能。
Using the damage model of large-span isolated structure,multi-dimensional and multi-point excitation IDA analysis is applied for four different large-span isolated and non-isolated grid structure. Ultra fortification intensity earthquake probability and damage development at different intense earthquake are carried out. The results show that for non-isolated structure,the damage of the steel roof will increase with the increasing of ground motion intensity,but it still less than the lower part of the structure. For large span isolated structure,damage of seismic isolation layer in smaller intensity is larger than the rest components,and the damage of steel roof is small at this time. When the ground motion gets larger,the damage of steel roof grows gradually and gets larger than the lower columns and beams. Under super fortification intensity earthquake,the damage of large span isolated structure is still small,which means it has good seismic performance.
出处
《工程抗震与加固改造》
北大核心
2016年第4期87-93,共7页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金(51178219)
国家科技支撑计划(2012BAJ07B00)
关键词
大跨隔震
网架结构
多维多点
损伤模型
large-span isolated structure
grid structure
dimensional and multi-excitation
damage model
