Transmission and reflection of waves on curtain wall breakwater

Subekti Subekti, Ahmad Shulhany

Abstract


Judul: Gelombang transmisi dan refleksi pada pemecah gelombang dinding tirai

Title: Transmission and reflection of waves on curtain wall breakwater

 

Pemecah gelombang sangat dibutuhkan pada kolam pelabuhan untuk mendapatkan perairan yang tenang sehingga kapal dapat naik/turunkan penumpang dan bongkar-muat barang secara aman dan nyaman. Pemecah gelombang dinding tirai merupakan salah satu pemecah gelombang yang hemat material jika dibandingkan dengan tipe pemecah gelombang tipe urugan. Tujuan penelitian ini adalah mengetahui pengaruh kedalaman dinding pada pemecah gelombang dinding tirai dan kecuraman gelombang datang terhadap nilai gelombang transmisi dan gelombang refleksi. Penelitian ini dilakukan dengan model fisik pada saluran gelombang. Berdasarkan hasil penelitian menunjukkan bahwa semakin dalam dinding terendam relative terhadap kedalaman (h/d) pemecah gelombang dinding tirai maka nilai koefisien gelombang transmisi (Kt)  semakin rendah dan semakin tinggi nilai wavestepness (Hi/L) dari gelombang datang makanilai koefisien transmisi gelombang semakin rendah juga. Adapun koefisien gelombang refleksi (Kr) berlaku sebaliknya.

 

Breakwaters are needed in harbour pools to get calm waters so that ships can board/unload passengers and load and unload goods safely and comfortably. The curtain wall breakwater is one of the material-efficient breakwaters when compared to the fill type breakwater. This research aimed to ascertain the influence of the wall's depth on the curtain wall breakwater and the steepness of the incident wave on the transmission and reflection wave values. This research was conducted with a physical model on the wave channel. Based on the results of the study indicate that the more profound the submerged wall relative to the depth (h/d) of the curtain wall breakwater, the lower the value of the wave transmission coefficient (Kt) and the higher the wave steepness (Hi/L) value of the incident wave, the lower the wave transmission coefficient value too. The reflection wave coefficient (Kr) is the opposite.


Keywords


Breakwater; Curtainwall; Transmission Wave; Reflection Wave; Wavesteepness;

Full Text:

PDF (English)

References


Dean, G. D., & Dalrymple, R. A. (1991). Water Wave Mechanics For Engineer and Scientists. Singapore: Word Scientific Publishing Company.

Sundar, V., & Subba-rao, B. V. V. (2002). Hydrodynamic pressures and forces on quadrant front face pile supported breakwater. Ocean Engineering, vol. 29, no. 2, pp.193-214.

Gotoh, H., Shao, S., & Memita, T. (2003). SPH-LES model for wave dissipation using curtainwall. Annual Jurnal of Hydraulic Engineering, vol. 47, pp. 397-402.

Suh, K. D., Shin, S., & Cox, D. T. (2005). Hydrodynamic characteristics of curtain-wall-pile breakwater, Proceedings of 31st IAHR Congress, pp. 11-16.

Suh, K.D., Shin, S., & Cox, D.T. (2006). Hydrodinamik charakteristics of pile supported vertical wall breakwaters. Journal of Waterway, Port, Coastal, and Ocean Engineering, vol. 132, no. 2, pp. 83-96.

Suh, K. D., Jung, H. Y., & Pyun, C. K. (2007). Wave reflection and transmission by curtainwall–pile breakwaters using circular piles. Ocean Engineering, vol. 34, no. 14-15, pp. 2100-2106

Ji, C. H., & Suh, K. D. (2008). Reflection and transmission of irregular waves by multiple-row curtainwall-pile breakwater. Proceedings of the Eighteenth International Offshore and Polar Engineering Conference, vol. 3, pp. 656-663.

Kouno, T., & Nakamura, T. (2009). Jacket-type breakwaters with water chambers in deep sea. Proceedings of the Nineteenth International Offshore and Polar Engineering Conference, vol. 3, pp. 1010-1016.

Rageh, O. S., Koraim, A. S., & Salem, T. N. (2009). Hydrodynamic efficiency of partially immersed caissons supported on piles. Ocean Engineering, vol. 36, no. 14, pp. 1112-1118.

Rageh, O. S., & Koraim, A. S. (2010). Hydraulic performance of vertical walls with horizontal slots used as breakwater. Coastal Engineering, vol. 57, no. 8, pp. 745-756.

Suh, K. D., Kim, Y. W., & Ji, C.H. (2011). An empirical formula for friction coefficient of a perforated wall with vertical slits. Ocean Engineering, vol. 58, no. 1, pp. 85–93.

Huang, Z., Li, Y., & Liu, Y., 2011. Hydraulic performance and wave loadings of perforated/slotted coastal structures: A review. Ocean Engineering, vol. 38, no. 1, pp. 618–626.

Laju, K., Sundar, V., & Sundaravadivelu, R. (2011). Hydrodynamic characteristics of pile supported skirt breakwater models. Applied Ocean Research, vol. 33, pp. 12-22.

He, F., & Huang, Z.. (2014). Hydrodynamic performance of pile-supported OWC-type structures as breakwaters: An experimental study. Ocean Engineering, vol. 88, pp. 618-626.

Nejadkazem, O., & Gharabaghi, A. R. M. (2012). Non-propagating waves and behavior of curtainwall-pile breakwaters. Jurnal of Persian Gulf (Marine Science), vol. 3, no. 7, pp. 11-26.

Ahmed, H., & Schlenkhoff, A. (2014). Numerical investigation of wave interaction with double vertical slotted walls. International Journall of Environment, Ecological and Maning Engineering, vol. 8, no. 8, pp. 536-543.

Koraim, A. S. (2014). Hydraulic characteristics of pile-supported l-shaped bars used as a screen breakwater. Ocean Engineering, vol. 83, pp. 36-51.

Zhang, S., & Li, X. (2014). Design formulas of transmission coefficients for permeable breakwaters. Water Science and Engineering, vol. 7, no. 4, pp.457-467.

Koraim, A. S. (2015). Mathematical study for analyzing caisson breakwater supported by two rows of piles. Ocean Engineering, vol. 104, pp. 89-106.

Somervell, L. T., Thampi, S. G., & Shashikala, A. P. (2018). Estimation of friction coefficient for double walled permeable vertical breakwater. Ocean Engineering, vol. 156, pp. 25–37.

Subekti, S., & Suseno, D., & Yuwono, N. (2019). Wave transmission through curtainwall pile breakwater (CPB). International Journal of Civil Engineering and Technology, Vol. 10, No. 6, pp. 389-398.




DOI: http://dx.doi.org/10.36055/tjst.v17i1.11026

Refbacks

  • There are currently no refbacks.


Copyright (c) 2021 Teknika: Jurnal Sains dan Teknologi

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Creative Commons License

Teknika: Jurnal Sains dan Teknologi is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.