Research on the Artificial Acceleration Test System of Combined Environment and Loading Effect for the Bridge Structure

Proceedings

Li, Shiya¹  Huang, Peiyan²  Tan, Xicheng³  Yao, Guowen⁴ 

[1] Author to whom correspondence should be addressed.;Presented at the 18th International Conference on Experimental Mechanics (ICEM18), Brussels, Belgium, 1–5 July 2018;School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China;State Key Laboratory Breeding Base of the Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China

关键词: bridge structure;    combined environment;    loading effect;    artificial acceleration test system;    long term performance;   

DOI  :  10.3390/ICEM18-05282

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The bridges will be in service in a complex environment for over 100 years under the increasing traffic loading. So the long-term performance determines their safety and durability. Limited by the test condition and ability, present researches are mostly focused on the natural environment exposure tests and artificial environment acceleration tests for materials and components. According to the service conditions and load characteristics of the bridges, the accelerated test system was developed for bridge structure under combined environment and loading. This test system consists of three parts, including a large environment box, loading system and monitoring system. The environment box is 32 m long, 4 m wide and 3/10 m high. It is divided into 5 working bins which can be used alone or in combination. The simulation environment includes high temperature drying, low temperature freezing and thawing, damp cold, high temperature cycle, salt fog, rain, carbonation, temperature and humidity alternating and optical spectrum light aging environment. The servo static and dynamic loading system adopts Servotest actuators with loading tonnage from 400 tons to 50 tons. And the total tonnage is 1200 tons. Aided by the prestressed concrete reaction wall, steel structure frames and the anchor system, the external loading system can exert dynamic and static loads on the bridge structure in the environment box. And the non-contact nondestructive monitoring system can real-time monitor and measure their long-term deformation, internal force, cracking and other damage. This artificial acceleration test system can support the Chinese Long Term Bridge Program, and improve the safety, durability, reliability and long service life of bridges and other civil engineering.

【 授权许可】

CC BY