Arch bridge: Arch ring is the main stress component, which mainly bears pressure, and there is huge horizontal thrust at the arch foot, which is a typical mechanical feature of arch bridge. The pier not only bears the pressure perpendicular to the ground, but also needs the horizontal thrust transmitted by the arch. Therefore, the pier of arch bridge is best built on solid rock foundation. Another way to solve the external thrust is to install tie rods at the two arch feet, and use the tension of the tie rods to offset the external thrust of the arch. This kind of arch is also called tied arch. Arch bridge is the most colorful and lively bridge type, and the deck can be under, above or through the arch.

Cable-stayed bridge: a bridge with cables as load-bearing members can be divided into suspension bridge and cable-stayed bridge according to the installation method of cables. The arc main cable of suspension bridge is erected by two pylons and becomes the main load-bearing component. The main cable is connected with the underground anchorages on both sides of the bridge, which transfers the relay in the main cable to the huge foundation anchorage. Suspension bridge has three main characteristics: first, it adopts towering towers. Secondly, its curved main cable has a beautiful curve, which forms a contrast between straight and curved, rigid and flexible with tall and straight towers and rigid-frame bridges. Thirdly, there is a huge anchor block on both sides of the bridge to fix the main cable connecting the shore. The weight of this anchor block should be moderate to resist the oblique upward tension formed by the main cable and ensure the safety of the bridge. Cable-stayed bridge is a kind of bridge invented only in modern times. It is hoisted by the cable-stayed bridge, and the tower of the cable-stayed bridge extends obliquely to both sides. Cable-stayed bridge does not need anchorage and is superior to suspension bridge in economic benefit.