局部位形约束生死单元法及其在施工力学分析中的应用

A method of element birth and death of local configuration constraint and its application in construction mechanics

借鉴桥梁工程中的3种安装定位原则,提出了适用于建筑工程安装的第4种定位原则。对现有的几种结构非线性施工力学分析方法的特点和适用性进行了研究分析,构造了一种改进的结构非线性施工力学分析方法——局部位形约束生死单元法,抑制了传统的直接生死单元法中"死"单元的"漂移"现象,能很好地控制施工力学模拟中新生单元的安装位形,符合工程安装的实际情况,适用范围广。将这种方法应用于实际工程"法门寺合十舍利塔主塔"的施工过程力学模拟中,理论计算结果和实测结果吻合较好,表明这种改进方法是结构施工力学分析的有效方法。

Based on the three positioning principles for installation in bridge engineering,the fourth positioning principle for installation which is suitable for the construction engineering is put forward.Based on the characteristics and applicability of a few existing analysis methods of construction mechanics for structure and according to the positioning principles of components of structure in actual projects,an improved nonlinear analysis method named element birth and death of local configuration constraint is put forward to solve the problem of death element’s ’floating’ in this paper.This method was applied in the mechanical emulation and analysis of the Heshi Stupa of Famen Temple during the construction process.The computation results by the improved method agreed with the measured values well in the project.This indicates that the improved method is an effective analysis method of construction mechanics for structure.