On such a basis, a performance function based on the shear strength envelope curve in the shape of quadratic parabola was established.

在此基础上，建立了基于二次抛物线形抗剪强度包络线的功能函数。

The performance function was decomposed into disjoint sets of variables to address the combinatorial explosion challenge caused by configuration variations.

该方法通过将性能函数分解为互不相交的变量子集，解决了因配置多样性产生的组合问题。

According to this, the difference between reserved clearance between a TBM shield and a tunnel outline and tunnel radial deformation is used as performance function.

基于此，将TBM盾壳与开挖轮廊面之间预留的间隙和隧道径向变形之差作为功能函数；

Abstr: Earthquake damage of water supply unit is predicted on the basis of analyzing the pipeline seismic performance function and the limitation state equation.

文章摘要： 在分析地震条件下管线功能函数及极限状态方程基础上，对城市供水管单元体进行震害预测。