摘要
花都巴江河东风大桥是一座三跨连续梁桥,桥梁于2010年竣工,并进行了静动载试验。经过六年的运营,需要对桥梁再次进行静动载试验,以评定其承载能力与工作状态。通过对比两次试验结果发现:桥梁在相同试验荷载作用下,本次静载试验所得桥梁挠度及控制截面应变较2010年试验时均有增大,但仍然处于弹性范围内;桥梁竖向频率也略大于理论值;桥梁工作状态良好。本次试验对今后东风大桥的安全运营提供了必要的技术参数,也为同类型桥梁的鉴定提供重要的技术资料。
The Dongfeng bridge on Bajiang River in Huadu is a three span continuous girder bridge. The static and dynamic load tests of the bridge were carried out when it was completed in 2010. In order to assess the carrying ca- pacity and working status of the bridge, it is necessary to carry out the static and dynamic load tests again as it has operated for six years. The tested deflection and strain in control section of the bridge is larger than these in 2010, but are still in elastic range. The inherent vertical frequency of the bridge is slightly larger than its theoretical value. It can be concluded that bridge works well until now. This test data provide not only necessary technical parameters for the safety operation of the Dongfeng Bridge in the future, but also important technical information for the identifi- cation of similar bridge.
出处
《广州建筑》
2017年第1期16-20,共5页
GUANGZHOU ARCHITECTURE
基金
广州市科技计划项目
编号201508020045
关键词
静动载试验
挠度
应变
基频
static and dynamic load test
deflection
strain
fundamental frequency
