Hi all, I was modelling the volume expansion (due to temperature change) by inputting the volume strain of material directly. But when I consider the tunnel, I cannot input the volume strain value to the lining ( plate material), so it shows the wrong…

I give -20 kN/m (point load) on my shallow foundation but when i calculate it. there is no any Fy apllied to my project ps. I activate oint load already Thank you