地下叠合墙接触面形式的设计研究

为解决地下工程中叠合结构接触面采用常规凿毛等方式进行预处理时存在的施工难度大、剪力槽设置参差不齐等难题，提出一种便于施工的预制叠合结构形式，然后运用ANSYS有限元软件对波浪形、三角形以及梯形波纹结构面进行受力对比分析，结果表明梯形结构面在结构应力、接触面压力以及接触面滑移方面更有优势，并确定梯形结构面作为静力荷载试验方案。通过静力荷载试验对比分析整体现浇梁和梯形结构面叠合梁在各级荷载作用下的挠度、水平位移以及裂缝开展形态，结合实测数据表明： 在受到相同荷载作用下，叠合梁的挠度增量小于整体现浇梁，同时叠合梁在裂缝开展阶段存在停滞现象，能够减缓裂缝穿过叠合面，从而提高结构的整体承载力。

Design of Contact Surface of Underground Composite Wall

The pretreatment for the contact surface of the composite structure in underground engineering by conventional roughening method is characterized by large construction difficulty and uneven shear groove setting. As a result, a prefabricated composite structure form is proposed. And then the finite element software ANSYS is used to analyze the forces of the wave, triangle and trapezoidal corrugated structure planes, and the results show that the trapezoidal structure plane is superior to the other two in terms of structural stress, interface pressure and contact surface slip; the trapezoidal structure plane is chosen for the static load test. The deflection, horizontal displacement and crack development of the cast beam and trapezoidal structure surface composite beam under different loading levels are analyzed by static load test; and the monitoring data show that: Under the same loads, the deflection increment of composite beam is less than the cast beam; and the composite beam stagnates during crack development stage, which can mitigate the crack go cross the composite surface, and further improve the bearing capacity of the structure.