Strong movement caused by the seismic event causes damage to the bridges under moving loads. Generally, bridges are designed for resisting vertical gravity load, that is, dead load, but when bridges experience a horizontal force (which is caused by the seismic event), they can damage the bridges and pier cap or decrease the life span of the bridges. Earthquake forces, wind and wave forces, and harmonic excitation forces are the horizontal forces because they oscillate the structure/building in the horizontal direction. Earthquake forces act similarly to sound waves and are produced at different frequencies and different amplitudes. The present investigation focuses on the different types of model prototype frames, which include C, T, H, I, and square-shaped cross sections, and performs their theoretical calculations and numerical simulations. The model frame consists of steel material with suitable spacing. The models are made with the same material column for the same stiffness of the bridge structures. The objective is to understand the response behavior of the frame of the pier cap under known input excitation while realizing the occurrence of the resonance phenomenon in multi-degree-of-freedom systems. Upon completion of the model, a free vibration test is performed over the model to determine the actual properties such as stiffness and natural frequencies. Damping ratio, mode shape. ANSYS (harmonic response) is used for excitation, and the corresponding response of the physical model is measured in terms of amplitude, natural frequency, resonance frequency, acceleration, and mode shape. The theoretical results are compared with the numerical analysis.