中文摘要：

微型钢管桩具有布置灵活、施工速度快、适应性强以及对环境影响小等优点，因而在工程中的应用日益广泛。对9根微型钢管桩进行抗弯性能试验，分析其受弯破坏的3个阶段及抗弯性能的影响因素。采用光纤光栅传感器对部分试件进行全程应变监测，发现光纤光栅传感器适用于微型钢管桩的受力监测。

英文摘要：

The micro-steel-pipe pile has many advantages, such as flexible layout, rapid construction speed, well-adapted and little im- pact on environment, so it has been widely used in engineering projects.Basis on the flexural behavior test of 9 mini micro-steel-pipe piles, analyze the three stages of the bending destruction and the influence factors of the lexural behavior.optical fiber bragg grating sensors were used to monitor the strain of some specimens during the whole experiment progress and it has been found out that it is flexible to monitor the stress of micro-steel-pipe piles with optical fiber bragg grating sensor.