基于上海某科研实验室的结构设计,对其超限情况进行分析判别,发现结构存在扭转不规则、楼板局部不连续、侧向刚度不规则、竖向抗侧力构件不连续和有效楼板宽度偏窄的不规则项。针对结构的不规则项,采取合理的加强措施,并用YJK 4.0和MIDA...基于上海某科研实验室的结构设计,对其超限情况进行分析判别,发现结构存在扭转不规则、楼板局部不连续、侧向刚度不规则、竖向抗侧力构件不连续和有效楼板宽度偏窄的不规则项。针对结构的不规则项,采取合理的加强措施,并用YJK 4.0和MIDAS Gen 2021对其进行计算分析,保证结构的主要指标满足规范的要求。同时,对因建筑功能要求形成的多处穿层柱以及西北角连桥薄弱部位进行针对性分析,发现均能满足规范要求,保证了结构的安全性和可靠性。展开更多
This paper summarizes the superiority of lead-rubber beating （LRB） continuous girder bridges. The research method for isolation performance is discussed when pile-soil interaction is considered. By the finite elemen...This paper summarizes the superiority of lead-rubber beating （LRB） continuous girder bridges. The research method for isolation performance is discussed when pile-soil interaction is considered. By the finite element method and self-compiling program, a systematic study of the reliability of LRB continuous girder bridges is given by the use of different indicators, including the riding comfort of the LRB system, the pounding and dynamic stability when the LRB system is subjected to seismic excitations, and the reliability of the LRB system when subjected to other common horizontal loads. The results show that the LRB system has obvious advantages over the traditional continuous girder structure. The LRB isolation effect remains good even when pile-soil interaction is considered; the vertical rigidity of the LRB guarantees desirable riding comfort. The LRB demonstrates good reliability when subjected to the effects of braking, wind loads and temperature. However, it is also pointed out that the pounding of the LRB system subjected to earthquakes must be avoided, and the dynamic stability may be reduced when the LRB system has higher piers and generates a larger displacement in a strong earthquake. Useful advice and guidance are proposed for engineering application.展开更多
Aim To develop a heterogeneous database united system(HDBUS)that combines the local database of Oracle, Sybase and SQL server distributed on different server into a global database,and supports the global transaction...Aim To develop a heterogeneous database united system(HDBUS)that combines the local database of Oracle, Sybase and SQL server distributed on different server into a global database,and supports the global transaction management and parallel query over the Intranet Methods In the designing and implementation of HDBUS two important concepts heterogeneous tables join. Results and Conclu- tion The first concept can be used to process the parallel query of multiple database server, the second one is the key technology of heterogeneous is the key technology of heterogeneous distribute database.展开更多
文摘基于上海某科研实验室的结构设计,对其超限情况进行分析判别,发现结构存在扭转不规则、楼板局部不连续、侧向刚度不规则、竖向抗侧力构件不连续和有效楼板宽度偏窄的不规则项。针对结构的不规则项,采取合理的加强措施,并用YJK 4.0和MIDAS Gen 2021对其进行计算分析,保证结构的主要指标满足规范的要求。同时,对因建筑功能要求形成的多处穿层柱以及西北角连桥薄弱部位进行针对性分析,发现均能满足规范要求,保证了结构的安全性和可靠性。
基金The National Natural Science Foundation of China(No.51008134)
文摘This paper summarizes the superiority of lead-rubber beating （LRB） continuous girder bridges. The research method for isolation performance is discussed when pile-soil interaction is considered. By the finite element method and self-compiling program, a systematic study of the reliability of LRB continuous girder bridges is given by the use of different indicators, including the riding comfort of the LRB system, the pounding and dynamic stability when the LRB system is subjected to seismic excitations, and the reliability of the LRB system when subjected to other common horizontal loads. The results show that the LRB system has obvious advantages over the traditional continuous girder structure. The LRB isolation effect remains good even when pile-soil interaction is considered; the vertical rigidity of the LRB guarantees desirable riding comfort. The LRB demonstrates good reliability when subjected to the effects of braking, wind loads and temperature. However, it is also pointed out that the pounding of the LRB system subjected to earthquakes must be avoided, and the dynamic stability may be reduced when the LRB system has higher piers and generates a larger displacement in a strong earthquake. Useful advice and guidance are proposed for engineering application.
文摘Aim To develop a heterogeneous database united system(HDBUS)that combines the local database of Oracle, Sybase and SQL server distributed on different server into a global database,and supports the global transaction management and parallel query over the Intranet Methods In the designing and implementation of HDBUS two important concepts heterogeneous tables join. Results and Conclu- tion The first concept can be used to process the parallel query of multiple database server, the second one is the key technology of heterogeneous is the key technology of heterogeneous distribute database.
