倒T型导管墙桩基防波堤稳定性简化计算方法

倒T型导管墙桩基防波堤是一种重力式和桩基式混合而成的新型防波堤，具有复杂的承载机制和破坏模式。建立倒T型导管墙桩基防波堤稳定性分析的三维弹塑性有限元模型，分析极限状态下结构的位移场分布，得出其失稳模式为绕底板下且偏离桩基轴线一定距离的某点发生转动失稳。结合有限元法和极限平衡法，建立该新型防波堤的抗滑稳定性、抗倾稳定性计算的简化方法。与有限元计算结果的比较表明，建立的简化计算方法是可靠的。

A simplified calculation method for stability of inverted T-type breakwater with jackets and pile foundations

The inverted T-type breakwater with jackets and pile foundations which mixes gravity breakwater with pile is a new type of breakwater;its working mechanism and failure pattern are unclear.A 3D elastoplastic finite element model is established for its stability analysis.Based on the displacement field distribution of the structure in a critical state,the instability mode can be concluded as the inverted T-type breakwater with jackets and pile foundations rotates around a point that is below the top structure and deviates the axis of the pile foundations.For the purpose of engineering application,a simplified calculation method for anti-overturning and anti-sliding analyses is presented.In comparison with the finite element method,the simplified calculation method is reliable.