longitudinal compressive force meaning in English

纵向压力

The author advances that the shear connector is simulated by two spring elements , which are vertical to each other and parallel to the interface between steel and concrete , and one multipoint constraint element , mpc element , which is vertical to the interface . the author also puts forward that the crack of the deck is simulated by the gap element which ca n ' t support longitudinal tensile force but can support longitudinal compressive force
提出了以正交的两个平行于钢和混凝土界面的弹簧单元及一个垂直于界面的多点约束( mpc )单元来模拟剪力键，以小间隙接触( gap )单元来模拟混凝土桥面板的开裂，模型中忽略了混凝土板与钢梁接触面间由摩阻而产生的粘着力。